{"id":1993,"date":"2023-04-01T11:26:33","date_gmt":"2023-04-01T03:26:33","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=1993"},"modified":"2023-04-22T07:40:56","modified_gmt":"2023-04-21T23:40:56","slug":"playing-redis-a-long-story-on-how-to-troubleshoot-redis-performance-issues","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/04\/01\/playing-redis-a-long-story-on-how-to-troubleshoot-redis-performance-issues\/","title":{"rendered":"\u73a9\u8f6cRedis-\u4e07\u5b57\u957f\u6587\u8bb2\u900f\u5982\u4f55\u6392\u67e5Redis\u6027\u80fd\u95ee\u9898"},"content":{"rendered":"<p>Redis \u4f5c\u4e3a\u4f18\u79c0\u7684\u5185\u5b58\u6570\u636e\u5e93\uff0c\u5176\u62e5\u6709\u975e\u5e38\u9ad8\u7684\u6027\u80fd\uff0c\u5355\u4e2a\u5b9e\u4f8b\u7684 OPS \u80fd\u591f\u8fbe\u5230 10W \u5de6\u53f3\u3002\u4f46\u4e5f\u6b63\u56e0\u6b64\u5982\u6b64\uff0c\u5f53\u6211\u4eec\u5728\u4f7f\u7528 Redis \u65f6\uff0c\u5982\u679c\u53d1\u73b0\u64cd\u4f5c\u5ef6\u8fdf\u53d8\u5927\u7684\u60c5\u51b5\uff0c\u5c31\u4f1a\u4e0e\u6211\u4eec\u7684\u9884\u671f\u4e0d\u7b26\u3002<\/p>\n<p>\u4f60\u4e5f\u8bb8\u6216\u591a\u6216\u5c11\u5730\uff0c\u4e5f\u9047\u5230\u8fc7\u4ee5\u4e0b\u8fd9\u4e9b\u573a\u666f\uff1a<\/p>\n<ul>\n<li>\u5728 Redis \u4e0a\u6267\u884c\u540c\u6837\u7684\u547d\u4ee4\uff0c\u4e3a\u4ec0\u4e48\u6709\u65f6\u54cd\u5e94\u5f88\u5feb\uff0c\u6709\u65f6\u5374\u5f88\u6162\uff1f<\/li>\n<li>\u4e3a\u4ec0\u4e48 Redis \u6267\u884c SET\u3001DEL \u547d\u4ee4\u8017\u65f6\u4e5f\u5f88\u4e45\uff1f<\/li>\n<li>\u4e3a\u4ec0\u4e48\u6211\u7684 Redis \u7a81\u7136\u6162\u4e86\u4e00\u6ce2\uff0c\u4e4b\u540e\u53c8\u6062\u590d\u6b63\u5e38\u4e86\uff1f<\/li>\n<li>\u4e3a\u4ec0\u4e48\u6211\u7684 Redis \u7a33\u5b9a\u8fd0\u884c\u4e86\u5f88\u4e45\uff0c\u7a81\u7136\u4ece\u67d0\u4e2a\u65f6\u95f4\u70b9\u5f00\u59cb\u53d8\u6162\u4e86\uff1f<\/li>\n<li>&#8230;<\/li>\n<\/ul>\n<p><!-- more --><\/p>\n<p>\u5982\u679c\u4f60\u5e76\u4e0d\u6e05\u695a Redis \u5185\u90e8\u7684\u5b9e\u73b0\u539f\u7406\uff0c\u90a3\u4e48\u5728\u6392\u67e5\u8fd9\u79cd\u5ef6\u8fdf\u95ee\u9898\u65f6\u5c31\u4f1a\u4e00\u5934\u96fe\u6c34\u3002<\/p>\n<p>\u5982\u679c\u4f60\u4e5f\u9047\u5230\u4e86\u4ee5\u4e0a\u60c5\u51b5\uff0c\u90a3\u4e48\uff0c\u8fd9\u7bc7\u6587\u7ae0\u5c06\u4f1a\u7ed9\u4f60\u4e00\u4e2a\u300c\u5168\u9762\u300d\u7684\u95ee\u9898\u6392\u67e5\u601d\u8def\uff0c\u5e76\u4e14\u9488\u5bf9\u8fd9\u4e9b\u5bfc\u81f4\u53d8\u6162\u7684\u573a\u666f\uff0c\u6211\u8fd8\u4f1a\u7ed9\u4f60\u4e00\u4e2a\u9ad8\u6548\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n<p>\u5728\u6b63\u6587\u5f00\u59cb\u4e4b\u524d\uff0c\u6211\u9700\u8981\u63d0\u9192\u4f60\u7684\u662f\uff0c\u8fd9\u7bc7\u6587\u7ae0\u5f88\u957f\uff0c\u6db5\u76d6\u7684 Redis \u77e5\u8bc6\u70b9\u4e5f\u975e\u5e38\u5e7f\uff0c\u5168\u7bc7\u6587\u7ae0\u63a5\u8fd1 2W \u5b57\uff0c\u5982\u679c\u6b64\u65f6\u4f60\u7684\u9605\u8bfb\u73af\u5883\u4e0d\u9002\u5408\u4e13\u6ce8\u9605\u8bfb\uff0c\u6211\u5efa\u8bae\u4f60\u5148\u6536\u85cf\u6b64\u6587\u7ae0\uff0c\u7136\u540e\u5728\u5408\u9002\u7684\u65f6\u95f4\u4e13\u6ce8\u9605\u8bfb\u8fd9\u7bc7\u6587\u7ae0\u3002<\/p>\n<p>\u5982\u679c\u4f60\u80fd\u8010\u5fc3\u4e14\u8ba4\u771f\u5730\u8bfb\u5b8c\u8fd9\u7bc7\u6587\u7ae0\uff0c\u6211\u53ef\u4ee5\u4fdd\u8bc1\uff0c\u4f60\u5bf9 Redis \u7684\u6027\u80fd\u8c03\u4f18\u5c06\u4f1a\u6709\u975e\u5e38\u5927\u7684\u6536\u83b7\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.yezhou.me\/AppBlog\/images\/\u8fd0\u7ef4\/\u6392\u67e5Redis\u6027\u80fd\u95ee\u9898.png\" alt=\"\u6392\u67e5Redis\u6027\u80fd\u95ee\u9898\" \/><\/p>\n<h2>Redis\u771f\u7684\u53d8\u6162\u4e86\u5417\uff1f<\/h2>\n<p>\u9996\u5148\uff0c\u5728\u5f00\u59cb\u4e4b\u524d\uff0c\u4f60\u9700\u8981\u5f04\u6e05\u695a Redis \u662f\u5426\u771f\u7684\u53d8\u6162\u4e86\uff1f<\/p>\n<p>\u5982\u679c\u4f60\u53d1\u73b0\u4f60\u7684\u4e1a\u52a1\u670d\u52a1 API \u54cd\u5e94\u5ef6\u8fdf\u53d8\u957f\uff0c\u9996\u5148\u4f60\u9700\u8981\u5148\u6392\u67e5\u670d\u52a1\u5185\u90e8\uff0c\u7a76\u7adf\u662f\u54ea\u4e2a\u73af\u8282\u62d6\u6162\u4e86\u6574\u4e2a\u670d\u52a1\u3002<\/p>\n<p>\u6bd4\u8f83\u9ad8\u6548\u7684\u505a\u6cd5\u662f\uff0c\u5728\u670d\u52a1\u5185\u90e8\u96c6\u6210<strong>\u94fe\u8def\u8ffd\u8e2a<\/strong>\uff0c\u4e5f\u5c31\u662f\u5728\u670d\u52a1\u8bbf\u95ee\u5916\u90e8\u4f9d\u8d56\u7684\u51fa\u5165\u53e3\uff0c\u8bb0\u5f55\u4e0b\u6bcf\u6b21\u8bf7\u6c42\u5916\u90e8\u4f9d\u8d56\u7684\u54cd\u5e94\u5ef6\u65f6\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.yezhou.me\/AppBlog\/images\/\u8fd0\u7ef4\/\u6392\u67e5Redis\u6027\u80fd\u95ee\u9898-\u94fe\u8def\u8ffd\u8e2a\u7edf\u8ba1\u5ef6\u65f6.png\" alt=\"\u6392\u67e5Redis\u6027\u80fd\u95ee\u9898-\u94fe\u8def\u8ffd\u8e2a\u7edf\u8ba1\u5ef6\u65f6\" \/><\/p>\n<p>\u5982\u679c\u4f60\u53d1\u73b0\u786e\u5b9e\u662f\u64cd\u4f5c Redis \u7684\u8fd9\u6761\u94fe\u8def\u8017\u65f6\u53d8\u957f\u4e86\uff0c\u90a3\u4e48\u6b64\u523b\u4f60\u9700\u8981\u628a\u7126\u70b9\u5173\u6ce8\u5728\u4e1a\u52a1\u670d\u52a1\u5230 Redis \u8fd9\u6761\u94fe\u8def\u4e0a\u3002<\/p>\n<p>\u4ece\u4f60\u7684\u4e1a\u52a1\u670d\u52a1\u5230 Redis \u8fd9\u6761\u94fe\u8def\u53d8\u6162\u7684\u539f\u56e0\u53ef\u80fd\u4e5f\u6709 2 \u4e2a\uff1a<\/p>\n<ul>\n<li>\u4e1a\u52a1\u670d\u52a1\u5668\u5230 Redis \u670d\u52a1\u5668\u4e4b\u95f4\u7684\u7f51\u7edc\u5b58\u5728\u95ee\u9898\uff0c\u4f8b\u5982\u7f51\u7edc\u7ebf\u8def\u8d28\u91cf\u4e0d\u4f73\uff0c\u7f51\u7edc\u6570\u636e\u5305\u5728\u4f20\u8f93\u65f6\u5b58\u5728\u5ef6\u8fdf\u3001\u4e22\u5305\u7b49\u60c5\u51b5<\/li>\n<li>Redis \u672c\u8eab\u5b58\u5728\u95ee\u9898\uff0c\u9700\u8981\u8fdb\u4e00\u6b65\u6392\u67e5\u662f\u4ec0\u4e48\u539f\u56e0\u5bfc\u81f4 Redis \u53d8\u6162<\/li>\n<\/ul>\n<p>\u901a\u5e38\u6765\u8bf4\uff0c\u7b2c\u4e00\u79cd\u60c5\u51b5\u53d1\u751f\u7684\u6982\u7387\u6bd4\u8f83\u5c0f\uff0c\u5982\u679c\u662f\u670d\u52a1\u5668\u4e4b\u95f4\u7f51\u7edc\u5b58\u5728\u95ee\u9898\uff0c\u90a3\u90e8\u7f72\u5728\u8fd9\u53f0\u4e1a\u52a1\u670d\u52a1\u5668\u4e0a\u7684\u6240\u6709\u670d\u52a1\u90fd\u4f1a\u53d1\u751f\u7f51\u7edc\u5ef6\u8fdf\u7684\u60c5\u51b5\uff0c\u6b64\u65f6\u4f60\u9700\u8981\u8054\u7cfb\u7f51\u7edc\u8fd0\u7ef4\u540c\u4e8b\uff0c\u8ba9\u5176\u534f\u52a9\u89e3\u51b3\u7f51\u7edc\u95ee\u9898\u3002<\/p>\n<p>\u6211\u4eec\u8fd9\u7bc7\u6587\u7ae0\uff0c\u91cd\u70b9\u5173\u6ce8\u7684\u662f\u7b2c\u4e8c\u79cd\u60c5\u51b5\u3002<\/p>\n<p>\u4e5f\u5c31\u662f\u4ece Redis \u89d2\u5ea6\u6765\u6392\u67e5\uff0c\u662f\u5426\u5b58\u5728\u5bfc\u81f4\u53d8\u6162\u7684\u573a\u666f\uff0c\u4ee5\u53ca\u90fd\u6709\u54ea\u4e9b\u56e0\u7d20\u4f1a\u5bfc\u81f4 Redis \u7684\u5ef6\u8fdf\u589e\u52a0\uff0c\u7136\u540e\u9488\u5bf9\u6027\u5730\u8fdb\u884c\u4f18\u5316\u3002<\/p>\n<p>\u6392\u9664\u7f51\u7edc\u539f\u56e0\uff0c\u5982\u4f55\u786e\u8ba4\u4f60\u7684 Redis \u662f\u5426\u771f\u7684\u53d8\u6162\u4e86\uff1f<\/p>\n<p>\u9996\u5148\uff0c\u4f60\u9700\u8981\u5bf9 Redis \u8fdb\u884c\u57fa\u51c6\u6027\u80fd\u6d4b\u8bd5\uff0c\u4e86\u89e3\u4f60\u7684 Redis \u5728\u751f\u4ea7\u73af\u5883\u670d\u52a1\u5668\u4e0a\u7684\u57fa\u51c6\u6027\u80fd\u3002<\/p>\n<p><strong>\u4ec0\u4e48\u662f\u57fa\u51c6\u6027\u80fd\uff1f<\/strong><\/p>\n<p>\u7b80\u5355\u6765\u8bb2\uff0c\u57fa\u51c6\u6027\u80fd\u5c31\u662f\u6307 Redis \u5728\u4e00\u53f0\u8d1f\u8f7d\u6b63\u5e38\u7684\u673a\u5668\u4e0a\uff0c\u5176\u6700\u5927\u7684\u54cd\u5e94\u5ef6\u8fdf\u548c\u5e73\u5747\u54cd\u5e94\u5ef6\u8fdf\u5206\u522b\u662f\u600e\u6837\u7684\uff1f<\/p>\n<p>\u4e3a\u4ec0\u4e48\u8981\u6d4b\u8bd5\u57fa\u51c6\u6027\u80fd\uff1f\u6211\u53c2\u8003\u522b\u4eba\u63d0\u4f9b\u7684\u54cd\u5e94\u5ef6\u8fdf\uff0c\u5224\u65ad\u81ea\u5df1\u7684 Redis \u662f\u5426\u53d8\u6162\u4e0d\u884c\u5417\uff1f<\/p>\n<p>\u7b54\u6848\u662f\u5426\u5b9a\u7684\u3002<\/p>\n<p>\u56e0\u4e3a Redis \u5728\u4e0d\u540c\u7684\u8f6f\u786c\u4ef6\u73af\u5883\u4e0b\uff0c\u5b83\u7684\u6027\u80fd\u662f\u5404\u4e0d\u76f8\u540c\u7684\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u6211\u7684\u673a\u5668\u914d\u7f6e\u6bd4\u8f83\u4f4e\uff0c\u5f53\u5ef6\u8fdf\u4e3a 2ms \u65f6\uff0c\u6211\u5c31\u8ba4\u4e3a Redis \u53d8\u6162\u4e86\uff0c\u4f46\u662f\u5982\u679c\u4f60\u7684\u786c\u4ef6\u914d\u7f6e\u6bd4\u8f83\u9ad8\uff0c\u90a3\u4e48\u5728\u4f60\u7684\u8fd0\u884c\u73af\u5883\u4e0b\uff0c\u53ef\u80fd\u5ef6\u8fdf\u662f 0.5ms \u65f6\u5c31\u53ef\u4ee5\u8ba4\u4e3a Redis \u53d8\u6162\u4e86\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u4f60\u53ea\u6709\u4e86\u89e3\u4e86\u4f60\u7684 Redis \u5728\u751f\u4ea7\u73af\u5883\u670d\u52a1\u5668\u4e0a\u7684\u57fa\u51c6\u6027\u80fd\uff0c\u624d\u80fd\u8fdb\u4e00\u6b65\u8bc4\u4f30\uff0c\u5f53\u5176\u5ef6\u8fdf\u8fbe\u5230\u4ec0\u4e48\u7a0b\u5ea6\u65f6\uff0c\u624d\u8ba4\u4e3a Redis \u786e\u5b9e\u53d8\u6162\u4e86\u3002<\/p>\n<p><strong>\u5177\u4f53\u5982\u4f55\u505a\uff1f<\/strong><\/p>\n<p>\u4e3a\u4e86\u907f\u514d\u4e1a\u52a1\u670d\u52a1\u5668\u5230 Redis \u670d\u52a1\u5668\u4e4b\u95f4\u7684\u7f51\u7edc\u5ef6\u8fdf\uff0c\u4f60\u9700\u8981\u76f4\u63a5\u5728 Redis \u670d\u52a1\u5668\u4e0a\u6d4b\u8bd5\u5b9e\u4f8b\u7684\u54cd\u5e94\u5ef6\u8fdf\u60c5\u51b5\u3002\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\uff0c\u5c31\u53ef\u4ee5\u6d4b\u8bd5\u51fa\u8fd9\u4e2a\u5b9e\u4f8b 60 \u79d2\u5185\u7684\u6700\u5927\u54cd\u5e94\u5ef6\u8fdf\uff1a<\/p>\n<pre><code class=\"language-bash\">$ redis-cli -h 127.0.0.1 -p 6379 --intrinsic-latency 60\nMax latency so far: 1 microseconds.\nMax latency so far: 15 microseconds.\nMax latency so far: 17 microseconds.\nMax latency so far: 18 microseconds.\nMax latency so far: 31 microseconds.\nMax latency so far: 32 microseconds.\nMax latency so far: 59 microseconds.\nMax latency so far: 72 microseconds.\n\n1428669267 total runs (avg latency: 0.0420 microseconds \/ 42.00 nanoseconds per run).\nWorst run took 1429x longer than the average latency.<\/code><\/pre>\n<p>\u4ece\u8f93\u51fa\u7ed3\u679c\u53ef\u4ee5\u770b\u5230\uff0c\u8fd9 60 \u79d2\u5185\u7684\u6700\u5927\u54cd\u5e94\u5ef6\u8fdf\u4e3a 72 \u5fae\u79d2\uff080.072\u6beb\u79d2\uff09\u3002<\/p>\n<p>\u4f60\u8fd8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff0c\u67e5\u770b\u4e00\u6bb5\u65f6\u95f4\u5185 Redis \u7684\u6700\u5c0f\u3001\u6700\u5927\u3001\u5e73\u5747\u8bbf\u95ee\u5ef6\u8fdf\uff1a<\/p>\n<pre><code class=\"language-bash\">$ redis-cli -h 127.0.0.1 -p 6379 --latency-history -i 1\nmin: 0, max: 1, avg: 0.13 (100 samples) -- 1.01 seconds range\nmin: 0, max: 1, avg: 0.12 (99 samples) -- 1.01 seconds range\nmin: 0, max: 1, avg: 0.13 (99 samples) -- 1.01 seconds range\nmin: 0, max: 1, avg: 0.10 (99 samples) -- 1.01 seconds range\nmin: 0, max: 1, avg: 0.13 (98 samples) -- 1.00 seconds range\nmin: 0, max: 1, avg: 0.08 (99 samples) -- 1.01 seconds range\n...<\/code><\/pre>\n<p>\u4ee5\u4e0a\u8f93\u51fa\u7ed3\u679c\u662f\uff0c\u6bcf\u95f4\u9694 1 \u79d2\uff0c\u91c7\u6837 Redis \u7684\u5e73\u5747\u64cd\u4f5c\u8017\u65f6\uff0c\u5176\u7ed3\u679c\u5206\u5e03\u5728 0.08 ~ 0.13 \u6beb\u79d2\u4e4b\u95f4\u3002<\/p>\n<p>\u4e86\u89e3\u4e86\u57fa\u51c6\u6027\u80fd\u6d4b\u8bd5\u65b9\u6cd5\uff0c\u90a3\u4e48\u4f60\u5c31\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u51e0\u6b65\uff0c\u6765\u5224\u65ad\u4f60\u7684 Redis \u662f\u5426\u771f\u7684\u53d8\u6162\u4e86\uff1a<\/p>\n<ol>\n<li>\u5728\u76f8\u540c\u914d\u7f6e\u7684\u670d\u52a1\u5668\u4e0a\uff0c\u6d4b\u8bd5\u4e00\u4e2a\u6b63\u5e38 Redis \u5b9e\u4f8b\u7684\u57fa\u51c6\u6027\u80fd<\/li>\n<li>\u627e\u5230\u4f60\u8ba4\u4e3a\u53ef\u80fd\u53d8\u6162\u7684 Redis \u5b9e\u4f8b\uff0c\u6d4b\u8bd5\u8fd9\u4e2a\u5b9e\u4f8b\u7684\u57fa\u51c6\u6027\u80fd<\/li>\n<li>\u5982\u679c\u4f60\u89c2\u5bdf\u5230\uff0c\u8fd9\u4e2a\u5b9e\u4f8b\u7684\u8fd0\u884c\u5ef6\u8fdf\u662f\u6b63\u5e38 Redis \u57fa\u51c6\u6027\u80fd\u7684 2 \u500d\u4ee5\u4e0a\uff0c\u5373\u53ef\u8ba4\u4e3a\u8fd9\u4e2a Redis \u5b9e\u4f8b\u786e\u5b9e\u53d8\u6162\u4e86<\/li>\n<\/ol>\n<p>\u786e\u8ba4\u662f Redis \u53d8\u6162\u4e86\uff0c\u90a3\u5982\u4f55\u6392\u67e5\u662f\u54ea\u91cc\u53d1\u751f\u4e86\u95ee\u9898\u5462\uff1f<\/p>\n<p>\u4e0b\u9762\u8ddf\u7740\u6211\u7684\u601d\u8def\uff0c\u6211\u4eec\u4ece\u6613\u5230\u96be\uff0c\u4e00\u6b65\u6b65\u6765\u5206\u6790\u53ef\u80fd\u5bfc\u81f4 Redis \u53d8\u6162\u7684\u56e0\u7d20\u3002<\/p>\n<h2>\u4f7f\u7528\u590d\u6742\u5ea6\u8fc7\u9ad8\u7684\u547d\u4ee4<\/h2>\n<p>\u9996\u5148\uff0c\u7b2c\u4e00\u6b65\uff0c\u4f60\u9700\u8981\u53bb\u67e5\u770b\u4e00\u4e0b Redis \u7684\u6162\u65e5\u5fd7\uff08slowlog\uff09\u3002<\/p>\n<p>Redis \u63d0\u4f9b\u4e86\u6162\u65e5\u5fd7\u547d\u4ee4\u7684\u7edf\u8ba1\u529f\u80fd\uff0c\u5b83\u8bb0\u5f55\u4e86\u6709\u54ea\u4e9b\u547d\u4ee4\u5728\u6267\u884c\u65f6\u8017\u65f6\u6bd4\u8f83\u4e45\u3002<\/p>\n<p>\u67e5\u770b Redis \u6162\u65e5\u5fd7\u4e4b\u524d\uff0c\u4f60\u9700\u8981\u8bbe\u7f6e\u6162\u65e5\u5fd7\u7684\u9608\u503c\u3002\u4f8b\u5982\uff0c\u8bbe\u7f6e\u6162\u65e5\u5fd7\u7684\u9608\u503c\u4e3a 5 \u6beb\u79d2\uff0c\u5e76\u4e14\u4fdd\u7559\u6700\u8fd1 500 \u6761\u6162\u65e5\u5fd7\u8bb0\u5f55\uff1a<\/p>\n<pre><code class=\"language-bash\"># \u547d\u4ee4\u6267\u884c\u8017\u65f6\u8d85\u8fc7 5 \u6beb\u79d2\uff0c\u8bb0\u5f55\u6162\u65e5\u5fd7\nCONFIG SET slowlog-log-slower-than 5000\n# \u53ea\u4fdd\u7559\u6700\u8fd1 500 \u6761\u6162\u65e5\u5fd7\nCONFIG SET slowlog-max-len 500<\/code><\/pre>\n<p>\u8bbe\u7f6e\u5b8c\u6210\u4e4b\u540e\uff0c\u6240\u6709\u6267\u884c\u7684\u547d\u4ee4\u5982\u679c\u64cd\u4f5c\u8017\u65f6\u8d85\u8fc7\u4e86 5 \u6beb\u79d2\uff0c\u90fd\u4f1a\u88ab Redis \u8bb0\u5f55\u4e0b\u6765\u3002<\/p>\n<p>\u6b64\u65f6\uff0c\u4f60\u53ef\u4ee5\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\uff0c\u5c31\u53ef\u4ee5\u67e5\u8be2\u5230\u6700\u8fd1\u8bb0\u5f55\u7684\u6162\u65e5\u5fd7\uff1a<\/p>\n<pre><code class=\"language-bash\">127.0.0.1:6379&gt; SLOWLOG get 5\n1) 1) (integer) 32693       # \u6162\u65e5\u5fd7ID\n   2) (integer) 1593763337  # \u6267\u884c\u65f6\u95f4\u6233\n   3) (integer) 5299        # \u6267\u884c\u8017\u65f6(\u5fae\u79d2)\n   4) 1) &quot;LRANGE&quot;           # \u5177\u4f53\u6267\u884c\u7684\u547d\u4ee4\u548c\u53c2\u6570\n      2) &quot;user_list:2000&quot;\n      3) &quot;0&quot;\n      4) &quot;-1&quot;\n2) 1) (integer) 32692\n   2) (integer) 1593763337\n   3) (integer) 5044\n   4) 1) &quot;GET&quot;\n      2) &quot;user_info:1000&quot;\n...<\/code><\/pre>\n<p>\u901a\u8fc7\u67e5\u770b\u6162\u65e5\u5fd7\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u77e5\u9053\u5728\u4ec0\u4e48\u65f6\u95f4\u70b9\uff0c\u6267\u884c\u4e86\u54ea\u4e9b\u547d\u4ee4\u6bd4\u8f83\u8017\u65f6\u3002<\/p>\n<p>\u5982\u679c\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u6267\u884c\u7684 Redis \u547d\u4ee4\u6709\u4ee5\u4e0b\u7279\u70b9\uff0c\u90a3\u4e48\u6709\u53ef\u80fd\u4f1a\u5bfc\u81f4\u64cd\u4f5c\u5ef6\u8fdf\u53d8\u5927\uff1a<\/p>\n<ul>\n<li>\u7ecf\u5e38\u4f7f\u7528<code>O(N)<\/code>\u4ee5\u4e0a\u590d\u6742\u5ea6\u7684\u547d\u4ee4\uff0c\u4f8b\u5982<code>SORT<\/code>\u3001<code>SUNION<\/code>\u3001<code>ZUNIONSTORE<\/code>\u805a\u5408\u7c7b\u547d\u4ee4<\/li>\n<li>\u4f7f\u7528<code>O(N)<\/code>\u590d\u6742\u5ea6\u7684\u547d\u4ee4\uff0c\u4f46 N \u7684\u503c\u975e\u5e38\u5927<\/li>\n<\/ul>\n<p>\u7b2c\u4e00\u79cd\u60c5\u51b5\u5bfc\u81f4\u53d8\u6162\u7684\u539f\u56e0\u5728\u4e8e\uff0cRedis \u5728\u64cd\u4f5c\u5185\u5b58\u6570\u636e\u65f6\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u8fc7\u9ad8\uff0c\u8981\u82b1\u8d39\u66f4\u591a\u7684 CPU \u8d44\u6e90\u3002<\/p>\n<p>\u7b2c\u4e8c\u79cd\u60c5\u51b5\u5bfc\u81f4\u53d8\u6162\u7684\u539f\u56e0\u5728\u4e8e\uff0cRedis \u4e00\u6b21\u9700\u8981\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u7684\u6570\u636e\u8fc7\u591a\uff0c\u66f4\u591a\u65f6\u95f4\u82b1\u8d39\u5728\u6570\u636e\u534f\u8bae\u7684\u7ec4\u88c5\u548c\u7f51\u7edc\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u4ece\u8d44\u6e90\u4f7f\u7528\u7387\u5c42\u9762\u6765\u5206\u6790\uff0c\u5982\u679c\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u64cd\u4f5c Redis \u7684 OPS \u4e0d\u662f\u5f88\u5927\uff0c\u4f46 Redis \u5b9e\u4f8b\u7684<strong>CPU \u4f7f\u7528\u7387\u5374\u5f88\u9ad8<\/strong>\uff0c\u90a3\u4e48\u5f88\u6709\u53ef\u80fd\u662f\u4f7f\u7528\u4e86\u590d\u6742\u5ea6\u8fc7\u9ad8\u7684\u547d\u4ee4\u5bfc\u81f4\u7684\u3002<\/p>\n<p>\u9664\u6b64\u4e4b\u5916\uff0c\u6211\u4eec\u90fd\u77e5\u9053\uff0cRedis \u662f\u5355\u7ebf\u7a0b\u5904\u7406\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\uff0c\u5982\u679c\u4f60\u7ecf\u5e38\u4f7f\u7528\u4ee5\u4e0a\u547d\u4ee4\uff0c\u90a3\u4e48\u5f53 Redis \u5904\u7406\u5ba2\u6237\u7aef\u8bf7\u6c42\u65f6\uff0c\u4e00\u65e6\u524d\u9762\u67d0\u4e2a\u547d\u4ee4\u53d1\u751f\u8017\u65f6\uff0c\u5c31\u4f1a\u5bfc\u81f4\u540e\u9762\u7684\u8bf7\u6c42\u53d1\u751f\u6392\u961f\uff0c\u5bf9\u4e8e\u5ba2\u6237\u7aef\u6765\u8bf4\uff0c\u54cd\u5e94\u5ef6\u8fdf\u4e5f\u4f1a\u53d8\u957f\u3002<\/p>\n<p>\u9488\u5bf9\u8fd9\u79cd\u60c5\u51b5\u5982\u4f55\u89e3\u51b3\u5462\uff1f<\/p>\n<p>\u7b54\u6848\u5f88\u7b80\u5355\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u4f18\u5316\u4f60\u7684\u4e1a\u52a1\uff1a<\/p>\n<ul>\n<li>\u5c3d\u91cf\u4e0d\u4f7f\u7528<code>O(N)<\/code>\u4ee5\u4e0a\u590d\u6742\u5ea6\u8fc7\u9ad8\u7684\u547d\u4ee4\uff0c\u5bf9\u4e8e\u6570\u636e\u7684\u805a\u5408\u64cd\u4f5c\uff0c\u653e\u5728\u5ba2\u6237\u7aef\u505a<\/li>\n<li>\u6267\u884c<code>O(N)<\/code>\u547d\u4ee4\uff0c\u4fdd\u8bc1 N \u5c3d\u91cf\u7684\u5c0f\uff08\u63a8\u8350 N &lt;= 300\uff09\uff0c\u6bcf\u6b21\u83b7\u53d6\u5c3d\u91cf\u5c11\u7684\u6570\u636e\uff0c\u8ba9 Redis \u53ef\u4ee5\u53ca\u65f6\u5904\u7406\u8fd4\u56de<\/li>\n<\/ul>\n<h2>\u64cd\u4f5cbigkey<\/h2>\n<p>\u5982\u679c\u4f60\u67e5\u8be2\u6162\u65e5\u5fd7\u53d1\u73b0\uff0c\u5e76\u4e0d\u662f\u590d\u6742\u5ea6\u8fc7\u9ad8\u7684\u547d\u4ee4\u5bfc\u81f4\u7684\uff0c\u800c\u90fd\u662f SET \/ DEL \u8fd9\u79cd\u7b80\u5355\u547d\u4ee4\u51fa\u73b0\u5728\u6162\u65e5\u5fd7\u4e2d\uff0c\u90a3\u4e48\u4f60\u5c31\u8981\u6000\u7591\u4f60\u7684\u5b9e\u4f8b\u5426\u5199\u5165\u4e86 bigkey\u3002<\/p>\n<p>Redis \u5728\u5199\u5165\u6570\u636e\u65f6\uff0c\u9700\u8981\u4e3a\u65b0\u7684\u6570\u636e\u5206\u914d\u5185\u5b58\uff0c\u76f8\u5bf9\u5e94\u7684\uff0c\u5f53\u4ece Redis \u4e2d\u5220\u9664\u6570\u636e\u65f6\uff0c\u5b83\u4f1a\u91ca\u653e\u5bf9\u5e94\u7684\u5185\u5b58\u7a7a\u95f4\u3002<\/p>\n<p>\u5982\u679c\u4e00\u4e2a key \u5199\u5165\u7684 value \u975e\u5e38\u5927\uff0c\u90a3\u4e48 Redis \u5728<strong>\u5206\u914d\u5185\u5b58\u65f6\u5c31\u4f1a\u6bd4\u8f83\u8017\u65f6<\/strong>\u3002\u540c\u6837\u7684\uff0c\u5f53\u5220\u9664\u8fd9\u4e2a key \u65f6\uff0c<strong>\u91ca\u653e\u5185\u5b58\u4e5f\u4f1a\u6bd4\u8f83\u8017\u65f6<\/strong>\uff0c\u8fd9\u79cd\u7c7b\u578b\u7684 key \u6211\u4eec\u4e00\u822c\u79f0\u4e4b\u4e3a bigkey\u3002<\/p>\n<p>\u6b64\u65f6\uff0c\u4f60\u9700\u8981\u68c0\u67e5\u4f60\u7684\u4e1a\u52a1\u4ee3\u7801\uff0c\u662f\u5426\u5b58\u5728\u5199\u5165 bigkey \u7684\u60c5\u51b5\u3002\u4f60\u9700\u8981\u8bc4\u4f30\u5199\u5165\u4e00\u4e2a key \u7684\u6570\u636e\u5927\u5c0f\uff0c\u5c3d\u91cf\u907f\u514d\u4e00\u4e2a key \u5b58\u5165\u8fc7\u5927\u7684\u6570\u636e\u3002<\/p>\n<p><strong>\u5982\u679c\u5df2\u7ecf\u5199\u5165\u4e86 bigkey\uff0c\u90a3\u6709\u6ca1\u6709\u4ec0\u4e48\u529e\u6cd5\u53ef\u4ee5\u626b\u63cf\u51fa\u5b9e\u4f8b\u4e2d bigkey \u7684\u5206\u5e03\u60c5\u51b5\u5462\uff1f<\/strong><\/p>\n<p>\u7b54\u6848\u662f\u53ef\u4ee5\u7684\u3002<\/p>\n<p>Redis \u63d0\u4f9b\u4e86\u626b\u63cf bigkey \u7684\u547d\u4ee4\uff0c\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\u5c31\u53ef\u4ee5\u626b\u63cf\u51fa\uff0c\u4e00\u4e2a\u5b9e\u4f8b\u4e2d bigkey \u7684\u5206\u5e03\u60c5\u51b5\uff0c\u8f93\u51fa\u7ed3\u679c\u662f\u4ee5\u7c7b\u578b\u7ef4\u5ea6\u5c55\u793a\u7684\uff1a<\/p>\n<pre><code class=\"language-bash\">$ redis-cli -h 127.0.0.1 -p 6379 --bigkeys -i 0.01\n\n...\n-------- summary -------\n\nSampled 829675 keys in the keyspace!\nTotal key length in bytes is 10059825 (avg len 12.13)\n\nBiggest string found &#039;key:291880&#039; has 10 bytes\nBiggest   list found &#039;mylist:004&#039; has 40 items\nBiggest    set found &#039;myset:2386&#039; has 38 members\nBiggest   hash found &#039;myhash:3574&#039; has 37 fields\nBiggest   zset found &#039;myzset:2704&#039; has 42 members\n\n36313 strings with 363130 bytes (04.38% of keys, avg size 10.00)\n787393 lists with 896540 items (94.90% of keys, avg size 1.14)\n1994 sets with 40052 members (00.24% of keys, avg size 20.09)\n1990 hashs with 39632 fields (00.24% of keys, avg size 19.92)\n1985 zsets with 39750 members (00.24% of keys, avg size 20.03)<\/code><\/pre>\n<p>\u4ece\u8f93\u51fa\u7ed3\u679c\u6211\u4eec\u53ef\u4ee5\u5f88\u6e05\u6670\u5730\u770b\u5230\uff0c\u6bcf\u79cd\u6570\u636e\u7c7b\u578b\u6240\u5360\u7528\u7684\u6700\u5927\u5185\u5b58 \/ \u62e5\u6709\u6700\u591a\u5143\u7d20\u7684 key \u662f\u54ea\u4e00\u4e2a\uff0c\u4ee5\u53ca\u6bcf\u79cd\u6570\u636e\u7c7b\u578b\u5728\u6574\u4e2a\u5b9e\u4f8b\u4e2d\u7684\u5360\u6bd4\u548c\u5e73\u5747\u5927\u5c0f \/ \u5143\u7d20\u6570\u91cf\u3002<\/p>\n<p>\u5176\u5b9e\uff0c\u4f7f\u7528\u8fd9\u4e2a\u547d\u4ee4\u7684\u539f\u7406\uff0c\u5c31\u662f Redis \u5728\u5185\u90e8\u6267\u884c\u4e86 SCAN \u547d\u4ee4\uff0c\u904d\u5386\u6574\u4e2a\u5b9e\u4f8b\u4e2d\u6240\u6709\u7684 key\uff0c\u7136\u540e\u9488\u5bf9 key \u7684\u7c7b\u578b\uff0c\u5206\u522b\u6267\u884c<code>STRLEN<\/code>\u3001<code>LLEN<\/code>\u3001<code>HLEN<\/code>\u3001<code>SCARD<\/code>\u3001<code>ZCARD<\/code>\u547d\u4ee4\uff0c\u6765\u83b7\u53d6 String \u7c7b\u578b\u7684\u957f\u5ea6\u3001\u5bb9\u5668\u7c7b\u578b\uff08List\u3001Hash\u3001Set\u3001ZSet\uff09\u7684\u5143\u7d20\u4e2a\u6570\u3002<\/p>\n<p>\u8fd9\u91cc\u6211\u9700\u8981\u63d0\u9192\u4f60\u7684\u662f\uff0c\u5f53\u6267\u884c\u8fd9\u4e2a\u547d\u4ee4\u65f6\uff0c\u8981\u6ce8\u610f 2 \u4e2a\u95ee\u9898\uff1a<\/p>\n<ul>\n<li>\u5bf9\u7ebf\u4e0a\u5b9e\u4f8b\u8fdb\u884c bigkey \u626b\u63cf\u65f6\uff0cRedis \u7684 OPS \u4f1a\u7a81\u589e\uff0c\u4e3a\u4e86\u964d\u4f4e\u626b\u63cf\u8fc7\u7a0b\u4e2d\u5bf9 Redis \u7684\u5f71\u54cd\uff0c\u6700\u597d\u63a7\u5236\u4e00\u4e0b\u626b\u63cf\u7684\u9891\u7387\uff0c\u6307\u5b9a<code>-i<\/code>\u53c2\u6570\u5373\u53ef\uff0c\u5b83\u8868\u793a\u626b\u63cf\u8fc7\u7a0b\u4e2d\u6bcf\u6b21\u626b\u63cf\u540e\u4f11\u606f\u7684\u65f6\u95f4\u95f4\u9694\uff0c\u5355\u4f4d\u662f\u79d2<\/li>\n<li>\u626b\u63cf\u7ed3\u679c\u4e2d\uff0c\u5bf9\u4e8e\u5bb9\u5668\u7c7b\u578b\uff08List\u3001Hash\u3001Set\u3001ZSet\uff09\u7684 key\uff0c\u53ea\u80fd\u626b\u63cf\u51fa\u5143\u7d20\u6700\u591a\u7684 key\u3002\u4f46\u4e00\u4e2a key \u7684\u5143\u7d20\u591a\uff0c\u4e0d\u4e00\u5b9a\u8868\u793a\u5360\u7528\u5185\u5b58\u4e5f\u591a\uff0c\u4f60\u8fd8\u9700\u8981\u6839\u636e\u4e1a\u52a1\u60c5\u51b5\uff0c\u8fdb\u4e00\u6b65\u8bc4\u4f30\u5185\u5b58\u5360\u7528\u60c5\u51b5<\/li>\n<\/ul>\n<p>\u90a3\u9488\u5bf9 bigkey \u5bfc\u81f4\u5ef6\u8fdf\u7684\u95ee\u9898\uff0c\u6709\u4ec0\u4e48\u597d\u7684\u89e3\u51b3\u65b9\u6848\u5462\uff1f<\/p>\n<p>\u8fd9\u91cc\u6709\u4e24\u70b9\u53ef\u4ee5\u4f18\u5316\uff1a<\/p>\n<ul>\n<li>\u4e1a\u52a1\u5e94\u7528\u5c3d\u91cf\u907f\u514d\u5199\u5165 bigkey<\/li>\n<li>\u5982\u679c\u4f60\u4f7f\u7528\u7684 Redis \u662f 4.0 \u4ee5\u4e0a\u7248\u672c\uff0c\u7528<code>UNLINK<\/code>\u547d\u4ee4\u66ff\u4ee3<code>DEL<\/code>\uff0c\u6b64\u547d\u4ee4\u53ef\u4ee5\u628a\u91ca\u653e key \u5185\u5b58\u7684\u64cd\u4f5c\uff0c\u653e\u5230\u540e\u53f0\u7ebf\u7a0b\u4e2d\u53bb\u6267\u884c\uff0c\u4ece\u800c\u964d\u4f4e\u5bf9 Redis \u7684\u5f71\u54cd<\/li>\n<li>\u5982\u679c\u4f60\u4f7f\u7528\u7684 Redis \u662f 6.0 \u4ee5\u4e0a\u7248\u672c\uff0c\u53ef\u4ee5\u5f00\u542f<code>lazy-free<\/code>\u673a\u5236\uff08<code>lazyfree-lazy-user-del = yes<\/code>\uff09\uff0c\u5728\u6267\u884c DEL \u547d\u4ee4\u65f6\uff0c\u91ca\u653e\u5185\u5b58\u4e5f\u4f1a\u653e\u5230\u540e\u53f0\u7ebf\u7a0b\u4e2d\u6267\u884c<\/li>\n<\/ul>\n<p>\u4f46\u5373\u4fbf\u53ef\u4ee5\u4f7f\u7528\u65b9\u6848 2\uff0c\u6211\u4e5f\u4e0d\u5efa\u8bae\u4f60\u5728\u5b9e\u4f8b\u4e2d\u5b58\u5165 bigkey\u3002<\/p>\n<p>\u8fd9\u662f\u56e0\u4e3a bigkey \u5728\u5f88\u591a\u573a\u666f\u4e0b\uff0c\u4f9d\u65e7\u4f1a\u4ea7\u751f\u6027\u80fd\u95ee\u9898\u3002\u4f8b\u5982\uff0cbigkey \u5728\u5206\u7247\u96c6\u7fa4\u6a21\u5f0f\u4e0b\uff0c\u5bf9\u4e8e\u6570\u636e\u7684\u8fc1\u79fb\u4e5f\u4f1a\u6709\u6027\u80fd\u5f71\u54cd\uff0c\u4ee5\u53ca\u6211\u540e\u9762\u5373\u5c06\u8bb2\u5230\u7684\u6570\u636e\u8fc7\u671f\u3001\u6570\u636e\u6dd8\u6c70\u3001\u900f\u660e\u5927\u9875\uff0c\u90fd\u4f1a\u53d7\u5230 bigkey \u7684\u5f71\u54cd\u3002<\/p>\n<h2>\u96c6\u4e2d\u8fc7\u671f<\/h2>\n<p>\u5982\u679c\u4f60\u53d1\u73b0\uff0c\u5e73\u65f6\u5728\u64cd\u4f5c Redis \u65f6\uff0c\u5e76\u6ca1\u6709\u5ef6\u8fdf\u5f88\u5927\u7684\u60c5\u51b5\u53d1\u751f\uff0c\u4f46\u5728\u67d0\u4e2a\u65f6\u95f4\u70b9\u7a81\u7136\u51fa\u73b0\u4e00\u6ce2\u5ef6\u65f6\uff0c\u5176\u73b0\u8c61\u8868\u73b0\u4e3a\uff1a<strong>\u53d8\u6162\u7684\u65f6\u95f4\u70b9\u5f88\u6709\u89c4\u5f8b\uff0c\u4f8b\u5982\u67d0\u4e2a\u6574\u70b9\uff0c\u6216\u8005\u6bcf\u95f4\u9694\u591a\u4e45\u5c31\u4f1a\u53d1\u751f\u4e00\u6ce2\u5ef6\u8fdf<\/strong>\u3002<\/p>\n<p>\u5982\u679c\u662f\u51fa\u73b0\u8fd9\u79cd\u60c5\u51b5\uff0c\u90a3\u4e48\u4f60\u9700\u8981\u6392\u67e5\u4e00\u4e0b\uff0c\u4e1a\u52a1\u4ee3\u7801\u4e2d\u662f\u5426\u5b58\u5728\u8bbe\u7f6e\u5927\u91cf key \u96c6\u4e2d\u8fc7\u671f\u7684\u60c5\u51b5\u3002<\/p>\n<p>\u5982\u679c\u6709\u5927\u91cf\u7684 key \u5728\u67d0\u4e2a\u56fa\u5b9a\u65f6\u95f4\u70b9\u96c6\u4e2d\u8fc7\u671f\uff0c\u5728\u8fd9\u4e2a\u65f6\u95f4\u70b9\u8bbf\u95ee Redis \u65f6\uff0c\u5c31\u6709\u53ef\u80fd\u5bfc\u81f4\u5ef6\u65f6\u53d8\u5927\u3002<\/p>\n<p><strong>\u4e3a\u4ec0\u4e48\u96c6\u4e2d\u8fc7\u671f\u4f1a\u5bfc\u81f4 Redis \u5ef6\u8fdf\u53d8\u5927\uff1f<\/strong><\/p>\n<p>\u8fd9\u5c31\u9700\u8981\u6211\u4eec\u4e86\u89e3 Redis \u7684\u8fc7\u671f\u7b56\u7565\u662f\u600e\u6837\u7684\u3002<\/p>\n<p>Redis \u7684\u8fc7\u671f\u6570\u636e\u91c7\u7528\u88ab\u52a8\u8fc7\u671f + \u4e3b\u52a8\u8fc7\u671f\u4e24\u79cd\u7b56\u7565\uff1a<\/p>\n<ul>\n<li>\u88ab\u52a8\u8fc7\u671f\uff1a\u53ea\u6709\u5f53\u8bbf\u95ee\u67d0\u4e2a key \u65f6\uff0c\u624d\u5224\u65ad\u8fd9\u4e2a key \u662f\u5426\u5df2\u8fc7\u671f\uff0c\u5982\u679c\u5df2\u8fc7\u671f\uff0c\u5219\u4ece\u5b9e\u4f8b\u4e2d\u5220\u9664<\/li>\n<li>\u4e3b\u52a8\u8fc7\u671f\uff1aRedis \u5185\u90e8\u7ef4\u62a4\u4e86\u4e00\u4e2a\u5b9a\u65f6\u4efb\u52a1\uff0c\u9ed8\u8ba4\u6bcf\u9694 100 \u6beb\u79d2\uff081\u79d210\u6b21\uff09\u5c31\u4f1a\u4ece\u5168\u5c40\u7684\u8fc7\u671f\u54c8\u5e0c\u8868\u4e2d\u968f\u673a\u53d6\u51fa 20 \u4e2a key\uff0c\u7136\u540e\u5220\u9664\u5176\u4e2d\u8fc7\u671f\u7684 key\uff0c\u5982\u679c\u8fc7\u671f key \u7684\u6bd4\u4f8b\u8d85\u8fc7\u4e86 25%\uff0c\u5219\u7ee7\u7eed\u91cd\u590d\u6b64\u8fc7\u7a0b\uff0c\u76f4\u5230\u8fc7\u671f key \u7684\u6bd4\u4f8b\u4e0b\u964d\u5230 25% \u4ee5\u4e0b\uff0c\u6216\u8005\u8fd9\u6b21\u4efb\u52a1\u7684\u6267\u884c\u8017\u65f6\u8d85\u8fc7\u4e86 25 \u6beb\u79d2\uff0c\u624d\u4f1a\u9000\u51fa\u5faa\u73af<\/li>\n<\/ul>\n<p>\u6ce8\u610f\uff0c<strong>\u8fd9\u4e2a\u4e3b\u52a8\u8fc7\u671f key \u7684\u5b9a\u65f6\u4efb\u52a1\uff0c\u662f\u5728 Redis \u4e3b\u7ebf\u7a0b\u4e2d\u6267\u884c\u7684<\/strong>\u3002<\/p>\n<p>\u4e5f\u5c31\u662f\u8bf4\u5982\u679c\u5728\u6267\u884c\u4e3b\u52a8\u8fc7\u671f\u7684\u8fc7\u7a0b\u4e2d\uff0c\u51fa\u73b0\u4e86\u9700\u8981\u5927\u91cf\u5220\u9664\u8fc7\u671f key \u7684\u60c5\u51b5\uff0c\u90a3\u4e48\u6b64\u65f6\u5e94\u7528\u7a0b\u5e8f\u5728\u8bbf\u95ee Redis \u65f6\uff0c\u5fc5\u987b\u8981\u7b49\u5f85\u8fd9\u4e2a\u8fc7\u671f\u4efb\u52a1\u6267\u884c\u7ed3\u675f\uff0cRedis \u624d\u53ef\u4ee5\u670d\u52a1\u8fd9\u4e2a\u5ba2\u6237\u7aef\u8bf7\u6c42\u3002<\/p>\n<p>\u6b64\u65f6\u5c31\u4f1a\u51fa\u73b0\uff0c\u5e94\u7528\u8bbf\u95ee Redis \u5ef6\u65f6\u53d8\u5927\u3002<\/p>\n<p>\u5982\u679c\u6b64\u65f6\u9700\u8981\u8fc7\u671f\u5220\u9664\u7684\u662f\u4e00\u4e2a bigkey\uff0c\u90a3\u4e48\u8fd9\u4e2a\u8017\u65f6\u4f1a\u66f4\u4e45\u3002\u800c\u4e14\uff0c<strong>\u8fd9\u4e2a\u64cd\u4f5c\u5ef6\u8fdf\u7684\u547d\u4ee4\u5e76\u4e0d\u4f1a\u8bb0\u5f55\u5728\u6162\u65e5\u5fd7\u4e2d<\/strong>\u3002<\/p>\n<p>\u56e0\u4e3a\u6162\u65e5\u5fd7\u4e2d\u53ea<strong>\u8bb0\u5f55\u4e00\u4e2a\u547d\u4ee4\u771f\u6b63\u64cd\u4f5c\u5185\u5b58\u6570\u636e\u7684\u8017\u65f6<\/strong>\uff0c\u800c Redis \u4e3b\u52a8\u5220\u9664\u8fc7\u671f key \u7684\u903b\u8f91\uff0c\u662f\u5728\u547d\u4ee4\u771f\u6b63\u6267\u884c\u4e4b\u524d\u6267\u884c\u7684\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u6b64\u65f6\u4f60\u4f1a\u770b\u5230\uff0c\u6162\u65e5\u5fd7\u4e2d\u6ca1\u6709\u64cd\u4f5c\u8017\u65f6\u7684\u547d\u4ee4\uff0c\u4f46\u6211\u4eec\u7684\u5e94\u7528\u7a0b\u5e8f\u5374\u611f\u77e5\u5230\u4e86\u5ef6\u8fdf\u53d8\u5927\uff0c\u5176\u5b9e\u65f6\u95f4\u90fd\u82b1\u8d39\u5728\u4e86\u5220\u9664\u8fc7\u671f key \u4e0a\uff0c\u8fd9\u79cd\u60c5\u51b5\u6211\u4eec\u9700\u8981\u5c24\u4e3a\u6ce8\u610f\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.yezhou.me\/AppBlog\/images\/\u8fd0\u7ef4\/\u6392\u67e5Redis\u6027\u80fd\u95ee\u9898-\u96c6\u4e2d\u8fc7\u671f.png\" alt=\"\u6392\u67e5Redis\u6027\u80fd\u95ee\u9898-\u96c6\u4e2d\u8fc7\u671f\" \/><\/p>\n<p><strong>\u90a3\u9047\u5230\u8fd9\u79cd\u60c5\u51b5\uff0c\u5982\u4f55\u5206\u6790\u548c\u6392\u67e5\uff1f<\/strong><\/p>\n<p>\u6b64\u65f6\uff0c\u4f60\u9700\u8981\u68c0\u67e5\u4f60\u7684\u4e1a\u52a1\u4ee3\u7801\uff0c\u662f\u5426\u5b58\u5728\u96c6\u4e2d\u8fc7\u671f key \u7684\u903b\u8f91\u3002<\/p>\n<p>\u4e00\u822c\u96c6\u4e2d\u8fc7\u671f\u4f7f\u7528\u7684\u662f<code>expireat<\/code> \/ <code>pexpireat<\/code> \u547d\u4ee4\uff0c\u4f60\u9700\u8981\u5728\u4ee3\u7801\u4e2d\u641c\u7d22\u8fd9\u4e2a\u5173\u952e\u5b57\u3002<\/p>\n<p>\u6392\u67e5\u4ee3\u7801\u540e\uff0c\u5982\u679c\u786e\u5b9e\u5b58\u5728\u96c6\u4e2d\u8fc7\u671f key \u7684\u903b\u8f91\u5b58\u5728\uff0c\u4f46\u8fd9\u79cd\u903b\u8f91\u53c8\u662f\u4e1a\u52a1\u6240\u5fc5\u987b\u7684\uff0c\u90a3\u6b64\u65f6\u5982\u4f55\u4f18\u5316\uff0c\u540c\u65f6\u53c8\u4e0d\u5bf9 Redis \u6709\u6027\u80fd\u5f71\u54cd\u5462\uff1f<\/p>\n<p>\u4e00\u822c\u6709\u4e24\u79cd\u65b9\u6848\u6765\u89c4\u907f\u8fd9\u4e2a\u95ee\u9898\uff1a<\/p>\n<ul>\n<li>\u96c6\u4e2d\u8fc7\u671f key \u589e\u52a0\u4e00\u4e2a\u968f\u673a\u8fc7\u671f\u65f6\u95f4\uff0c\u628a\u96c6\u4e2d\u8fc7\u671f\u7684\u65f6\u95f4\u6253\u6563\uff0c\u964d\u4f4e Redis \u6e05\u7406\u8fc7\u671f key \u7684\u538b\u529b<\/li>\n<li>\u5982\u679c\u4f60\u4f7f\u7528\u7684 Redis \u662f 4.0 \u4ee5\u4e0a\u7248\u672c\uff0c\u53ef\u4ee5\u5f00\u542f<code>lazy-free<\/code>\u673a\u5236\uff0c\u5f53\u5220\u9664\u8fc7\u671f key \u65f6\uff0c\u628a\u91ca\u653e\u5185\u5b58\u7684\u64cd\u4f5c\u653e\u5230\u540e\u53f0\u7ebf\u7a0b\u4e2d\u6267\u884c\uff0c\u907f\u514d\u963b\u585e\u4e3b\u7ebf\u7a0b<\/li>\n<\/ul>\n<p>\u7b2c\u4e00\u79cd\u65b9\u6848\uff0c\u5728\u8bbe\u7f6e key \u7684\u8fc7\u671f\u65f6\u95f4\u65f6\uff0c\u589e\u52a0\u4e00\u4e2a\u968f\u673a\u65f6\u95f4\uff0c\u4f2a\u4ee3\u7801\u53ef\u4ee5\u8fd9\u4e48\u5199\uff1a<\/p>\n<pre><code class=\"language-bash\"># \u5728\u8fc7\u671f\u65f6\u95f4\u70b9\u4e4b\u540e\u7684 5 \u5206\u949f\u5185\u968f\u673a\u8fc7\u671f\u6389\nredis.expireat(key, expire_time + random(300))<\/code><\/pre>\n<p>\u8fd9\u6837\u4e00\u6765\uff0cRedis \u5728\u5904\u7406\u8fc7\u671f\u65f6\uff0c\u4e0d\u4f1a\u56e0\u4e3a\u96c6\u4e2d\u5220\u9664\u8fc7\u591a\u7684 key \u5bfc\u81f4\u538b\u529b\u8fc7\u5927\uff0c\u4ece\u800c\u907f\u514d\u963b\u585e\u4e3b\u7ebf\u7a0b\u3002<\/p>\n<p>\u7b2c\u4e8c\u79cd\u65b9\u6848\uff0cRedis 4.0 \u4ee5\u4e0a\u7248\u672c\uff0c\u5f00\u542f<code>lazy-free<\/code>\u673a\u5236\uff1a<\/p>\n<pre><code class=\"language-bash\"># \u91ca\u653e\u8fc7\u671f key \u7684\u5185\u5b58\uff0c\u653e\u5230\u540e\u53f0\u7ebf\u7a0b\u6267\u884c\nlazyfree-lazy-expire yes<\/code><\/pre>\n<p>\u53e6\u5916\uff0c\u9664\u4e86\u4e1a\u52a1\u5c42\u9762\u7684\u4f18\u5316\u548c\u4fee\u6539\u914d\u7f6e\u4e4b\u5916\uff0c\u4f60\u8fd8\u53ef\u4ee5\u901a\u8fc7\u8fd0\u7ef4\u624b\u6bb5\u53ca\u65f6\u53d1\u73b0\u8fd9\u79cd\u60c5\u51b5\u3002<\/p>\n<p>\u8fd0\u7ef4\u5c42\u9762\uff0c\u4f60\u9700\u8981\u628a Redis \u7684\u5404\u9879\u8fd0\u884c\u72b6\u6001\u6570\u636e\u76d1\u63a7\u8d77\u6765\uff0c\u5728 Redis \u4e0a\u6267\u884c INFO \u547d\u4ee4\u5c31\u53ef\u4ee5\u62ff\u5230\u8fd9\u4e2a\u5b9e\u4f8b\u6240\u6709\u7684\u8fd0\u884c\u72b6\u6001\u6570\u636e\u3002<\/p>\n<p>\u5728\u8fd9\u91cc\u6211\u4eec\u9700\u8981\u91cd\u70b9\u5173\u6ce8<code>expired_keys<\/code>\u8fd9\u4e00\u9879\uff0c\u5b83\u4ee3\u8868\u6574\u4e2a\u5b9e\u4f8b\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u7d2f\u8ba1\u5220\u9664\u8fc7\u671f key \u7684\u6570\u91cf\u3002<\/p>\n<p>\u4f60\u9700\u8981\u628a\u8fd9\u4e2a\u6307\u6807\u76d1\u63a7\u8d77\u6765\uff0c<strong>\u5f53\u8fd9\u4e2a\u6307\u6807\u5728\u5f88\u77ed\u65f6\u95f4\u5185\u51fa\u73b0\u4e86\u7a81\u589e<\/strong>\uff0c\u9700\u8981\u53ca\u65f6\u62a5\u8b66\u51fa\u6765\uff0c\u7136\u540e\u4e0e\u4e1a\u52a1\u5e94\u7528\u62a5\u6162\u7684\u65f6\u95f4\u70b9\u8fdb\u884c\u5bf9\u6bd4\u5206\u6790\uff0c\u786e\u8ba4\u65f6\u95f4\u662f\u5426\u4e00\u81f4\uff0c\u5982\u679c\u4e00\u81f4\uff0c\u5219\u53ef\u4ee5\u786e\u8ba4\u786e\u5b9e\u662f\u56e0\u4e3a\u96c6\u4e2d\u8fc7\u671f key \u5bfc\u81f4\u7684\u5ef6\u8fdf\u53d8\u5927\u3002<\/p>\n<h2>\u5b9e\u4f8b\u5185\u5b58\u8fbe\u5230\u4e0a\u9650<\/h2>\n<p>\u5982\u679c\u4f60\u7684 Redis \u5b9e\u4f8b\u8bbe\u7f6e\u4e86\u5185\u5b58\u4e0a\u9650<code>maxmemory<\/code>\uff0c\u90a3\u4e48\u4e5f\u6709\u53ef\u80fd\u5bfc\u81f4 Redis \u53d8\u6162\u3002<\/p>\n<p>\u5f53\u6211\u4eec\u628a Redis \u5f53\u505a\u7eaf\u7f13\u5b58\u4f7f\u7528\u65f6\uff0c\u901a\u5e38\u4f1a\u7ed9\u8fd9\u4e2a\u5b9e\u4f8b\u8bbe\u7f6e\u4e00\u4e2a\u5185\u5b58\u4e0a\u9650<code>maxmemory<\/code>\uff0c\u7136\u540e\u8bbe\u7f6e\u4e00\u4e2a\u6570\u636e\u6dd8\u6c70\u7b56\u7565\u3002<\/p>\n<p>\u800c\u5f53\u5b9e\u4f8b\u7684\u5185\u5b58\u8fbe\u5230\u4e86<code>maxmemory<\/code>\u540e\uff0c\u4f60\u53ef\u80fd\u4f1a\u53d1\u73b0\uff0c\u5728\u6b64\u4e4b\u540e\u6bcf\u6b21\u5199\u5165\u65b0\u6570\u636e\uff0c\u64cd\u4f5c\u5ef6\u8fdf\u53d8\u5927\u4e86\u3002<\/p>\n<p>\u8fd9\u662f\u4e3a\u4ec0\u4e48\uff1f<\/p>\n<p>\u539f\u56e0\u5728\u4e8e\uff0c<strong>\u5f53 Redis \u5185\u5b58\u8fbe\u5230<code>maxmemory<\/code>\u540e\uff0c\u6bcf\u6b21\u5199\u5165\u65b0\u7684\u6570\u636e\u4e4b\u524d\uff0cRedis \u5fc5\u987b\u5148\u4ece\u5b9e\u4f8b\u4e2d\u8e22\u51fa\u4e00\u90e8\u5206\u6570\u636e\uff0c\u8ba9\u6574\u4e2a\u5b9e\u4f8b\u7684\u5185\u5b58\u7ef4\u6301\u5728 maxmemory \u4e4b\u4e0b\uff0c\u7136\u540e\u624d\u80fd\u628a\u65b0\u6570\u636e\u5199\u8fdb\u6765<\/strong>\u3002<\/p>\n<p>\u8fd9\u4e2a\u8e22\u51fa\u65e7\u6570\u636e\u7684\u903b\u8f91\u4e5f\u662f\u9700\u8981\u6d88\u8017\u65f6\u95f4\u7684\uff0c\u800c\u5177\u4f53\u8017\u65f6\u7684\u957f\u77ed\uff0c\u8981\u53d6\u51b3\u4e8e\u4f60\u914d\u7f6e\u7684\u6dd8\u6c70\u7b56\u7565\uff1a<\/p>\n<ul>\n<li><code>allkeys-lru<\/code>\uff1a\u4e0d\u7ba1 key \u662f\u5426\u8bbe\u7f6e\u4e86\u8fc7\u671f\uff0c\u6dd8\u6c70\u6700\u8fd1\u6700\u5c11\u8bbf\u95ee\u7684 key<\/li>\n<li><code>volatile-lru<\/code>\uff1a\u53ea\u6dd8\u6c70\u6700\u8fd1\u6700\u5c11\u8bbf\u95ee\u3001\u5e76\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684 key<\/li>\n<li><code>allkeys-random<\/code>\uff1a\u4e0d\u7ba1 key \u662f\u5426\u8bbe\u7f6e\u4e86\u8fc7\u671f\uff0c\u968f\u673a\u6dd8\u6c70 key<\/li>\n<li><code>volatile-random<\/code>\uff1a\u53ea\u968f\u673a\u6dd8\u6c70\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684 key<\/li>\n<li><code>allkeys-ttl<\/code>\uff1a\u4e0d\u7ba1 key \u662f\u5426\u8bbe\u7f6e\u4e86\u8fc7\u671f\uff0c\u6dd8\u6c70\u5373\u5c06\u8fc7\u671f\u7684 key<\/li>\n<li><code>noeviction<\/code>\uff1a\u4e0d\u6dd8\u6c70\u4efb\u4f55 key\uff0c\u5b9e\u4f8b\u5185\u5b58\u8fbe\u5230 maxmeory \u540e\uff0c\u518d\u5199\u5165\u65b0\u6570\u636e\u76f4\u63a5\u8fd4\u56de\u9519\u8bef<\/li>\n<li><code>allkeys-lfu<\/code>\uff1a\u4e0d\u7ba1 key \u662f\u5426\u8bbe\u7f6e\u4e86\u8fc7\u671f\uff0c\u6dd8\u6c70\u8bbf\u95ee\u9891\u7387\u6700\u4f4e\u7684 key\uff084.0+\u7248\u672c\u652f\u6301\uff09<\/li>\n<li><code>volatile-lfu<\/code>\uff1a\u53ea\u6dd8\u6c70\u8bbf\u95ee\u9891\u7387\u6700\u4f4e\u3001\u5e76\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4 key\uff084.0+\u7248\u672c\u652f\u6301\uff09<\/li>\n<\/ul>\n<p>\u5177\u4f53\u4f7f\u7528\u54ea\u79cd\u7b56\u7565\uff0c\u6211\u4eec\u9700\u8981\u6839\u636e\u5177\u4f53\u7684\u4e1a\u52a1\u573a\u666f\u6765\u914d\u7f6e\u3002<\/p>\n<p>\u4e00\u822c\u6700\u5e38\u4f7f\u7528\u7684\u662f<code>allkeys-lru<\/code> \/ <code>volatile-lru<\/code>\u6dd8\u6c70\u7b56\u7565\uff0c\u5b83\u4eec\u7684\u5904\u7406\u903b\u8f91\u662f\uff0c\u6bcf\u6b21\u4ece\u5b9e\u4f8b\u4e2d\u968f\u673a\u53d6\u51fa\u4e00\u6279 key\uff08\u8fd9\u4e2a\u6570\u91cf\u53ef\u914d\u7f6e\uff09\uff0c\u7136\u540e\u6dd8\u6c70\u4e00\u4e2a\u6700\u5c11\u8bbf\u95ee\u7684 key\uff0c\u4e4b\u540e\u628a\u5269\u4e0b\u7684 key \u6682\u5b58\u5230\u4e00\u4e2a\u6c60\u5b50\u4e2d\uff0c\u7ee7\u7eed\u968f\u673a\u53d6\u4e00\u6279 key\uff0c\u5e76\u4e0e\u4e4b\u524d\u6c60\u5b50\u4e2d\u7684 key \u6bd4\u8f83\uff0c\u518d\u6dd8\u6c70\u4e00\u4e2a\u6700\u5c11\u8bbf\u95ee\u7684 key\u3002\u4ee5\u6b64\u5f80\u590d\uff0c\u76f4\u5230\u5b9e\u4f8b\u5185\u5b58\u964d\u5230<code>maxmemory<\/code>\u4e4b\u4e0b\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cRedis \u7684\u6dd8\u6c70\u6570\u636e\u7684\u903b\u8f91\u4e0e\u5220\u9664\u8fc7\u671f key \u7684\u4e00\u6837\uff0c<strong>\u4e5f\u662f\u5728\u547d\u4ee4\u771f\u6b63\u6267\u884c\u4e4b\u524d\u6267\u884c\u7684<\/strong>\uff0c\u4e5f\u5c31\u662f\u8bf4\u5b83\u4e5f\u4f1a\u589e\u52a0\u6211\u4eec\u64cd\u4f5c Redis \u7684\u5ef6\u8fdf\uff0c\u800c\u4e14\uff0c\u5199 OPS \u8d8a\u9ad8\uff0c\u5ef6\u8fdf\u4e5f\u4f1a\u8d8a\u660e\u663e\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u5982\u679c\u6b64\u65f6\u4f60\u7684 Redis \u5b9e\u4f8b\u4e2d\u8fd8\u5b58\u50a8\u4e86 bigkey\uff0c\u90a3\u4e48<strong>\u5728\u6dd8\u6c70\u5220\u9664 bigkey \u91ca\u653e\u5185\u5b58\u65f6\uff0c\u4e5f\u4f1a\u8017\u65f6\u6bd4\u8f83\u4e45<\/strong>\u3002<\/p>\n<p>\u770b\u5230\u4e86\u4e48\uff1fbigkey \u7684\u5371\u5bb3\u5230\u5904\u90fd\u662f\uff0c\u8fd9\u4e5f\u662f\u524d\u9762\u6211\u63d0\u9192\u4f60\u5c3d\u91cf\u4e0d\u5b58\u50a8 bigkey \u7684\u539f\u56e0\u3002<\/p>\n<p>\u9488\u5bf9\u8fd9\u79cd\u60c5\u51b5\uff0c\u5982\u4f55\u89e3\u51b3\u5462\uff1f\u6211\u7ed9\u4f60 4 \u4e2a\u65b9\u9762\u7684\u4f18\u5316\u5efa\u8bae\uff1a<\/p>\n<ul>\n<li>\u907f\u514d\u5b58\u50a8 bigkey\uff0c\u964d\u4f4e\u91ca\u653e\u5185\u5b58\u7684\u8017\u65f6<\/li>\n<li>\u6dd8\u6c70\u7b56\u7565\u6539\u4e3a\u968f\u673a\u6dd8\u6c70\uff0c\u968f\u673a\u6dd8\u6c70\u6bd4 LRU \u8981\u5feb\u5f88\u591a\uff08\u89c6\u4e1a\u52a1\u60c5\u51b5\u8c03\u6574\uff09<\/li>\n<li>\u62c6\u5206\u5b9e\u4f8b\uff0c\u628a\u6dd8\u6c70 key \u7684\u538b\u529b\u5206\u644a\u5230\u591a\u4e2a\u5b9e\u4f8b\u4e0a<\/li>\n<li>\u5982\u679c\u4f7f\u7528\u7684\u662f Redis 4.0 \u4ee5\u4e0a\u7248\u672c\uff0c\u5f00\u542f<code>layz-free<\/code>\u673a\u5236\uff0c\u628a\u6dd8\u6c70 key \u91ca\u653e\u5185\u5b58\u7684\u64cd\u4f5c\u653e\u5230\u540e\u53f0\u7ebf\u7a0b\u4e2d\u6267\u884c\uff08\u914d\u7f6e<code>lazyfree-lazy-eviction = yes<\/code>\uff09<\/li>\n<\/ul>\n<h2>fork\u8017\u65f6\u4e25\u91cd<\/h2>\n<p>\u4e3a\u4e86\u4fdd\u8bc1 Redis \u6570\u636e\u7684\u5b89\u5168\u6027\uff0c\u6211\u4eec\u53ef\u80fd\u4f1a\u5f00\u542f\u540e\u53f0\u5b9a\u65f6 RDB \u548c AOF rewrite \u529f\u80fd\u3002<\/p>\n<p>\u4f46\u5982\u679c\u4f60\u53d1\u73b0\uff0c<strong>\u64cd\u4f5c Redis \u5ef6\u8fdf\u53d8\u5927\uff0c\u90fd\u53d1\u751f\u5728 Redis \u540e\u53f0 RDB \u548c AOF rewrite \u671f\u95f4<\/strong>\uff0c\u90a3\u4f60\u5c31\u9700\u8981\u6392\u67e5\uff0c\u5728\u8fd9\u671f\u95f4\u6709\u53ef\u80fd\u5bfc\u81f4\u53d8\u6162\u7684\u60c5\u51b5\u3002<\/p>\n<p>\u5f53 Redis \u5f00\u542f\u4e86\u540e\u53f0 RDB \u548c AOF rewrite \u540e\uff0c\u5728\u6267\u884c\u65f6\uff0c\u5b83\u4eec\u90fd\u9700\u8981\u4e3b\u8fdb\u7a0b\u521b\u5efa\u51fa\u4e00\u4e2a\u5b50\u8fdb\u7a0b\u8fdb\u884c\u6570\u636e\u7684\u6301\u4e45\u5316\u3002<\/p>\n<p>\u4e3b\u8fdb\u7a0b\u521b\u5efa\u5b50\u8fdb\u7a0b\uff0c\u4f1a\u8c03\u7528\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u7684 fork \u51fd\u6570\u3002<\/p>\n<p>\u800c fork \u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0c<strong>\u4e3b\u8fdb\u7a0b\u9700\u8981\u62f7\u8d1d\u81ea\u5df1\u7684\u5185\u5b58\u9875\u8868\u7ed9\u5b50\u8fdb\u7a0b<\/strong>\uff0c\u5982\u679c\u8fd9\u4e2a\u5b9e\u4f8b\u5f88\u5927\uff0c\u90a3\u4e48\u8fd9\u4e2a\u62f7\u8d1d\u7684\u8fc7\u7a0b\u4e5f\u4f1a\u6bd4\u8f83\u8017\u65f6\u3002<\/p>\n<p>\u800c\u4e14\u8fd9\u4e2a fork \u8fc7\u7a0b\u4f1a\u6d88\u8017\u5927\u91cf\u7684 CPU \u8d44\u6e90\uff0c\u5728\u5b8c\u6210 fork \u4e4b\u524d\uff0c\u6574\u4e2a Redis \u5b9e\u4f8b\u4f1a\u88ab\u963b\u585e\u4f4f\uff0c\u65e0\u6cd5\u5904\u7406\u4efb\u4f55\u5ba2\u6237\u7aef\u8bf7\u6c42\u3002<\/p>\n<p>\u5982\u679c\u6b64\u65f6\u4f60\u7684 CPU \u8d44\u6e90\u672c\u6765\u5c31\u5f88\u7d27\u5f20\uff0c\u90a3\u4e48 fork \u7684\u8017\u65f6\u4f1a\u66f4\u957f\uff0c\u751a\u81f3\u8fbe\u5230\u79d2\u7ea7\uff0c\u8fd9\u4f1a\u4e25\u91cd\u5f71\u54cd Redis \u7684\u6027\u80fd\u3002<\/p>\n<p>\u90a3\u5982\u4f55\u786e\u8ba4\u786e\u5b9e\u662f\u56e0\u4e3a fork \u8017\u65f6\u5bfc\u81f4\u7684 Redis \u5ef6\u8fdf\u53d8\u5927\u5462\uff1f<\/p>\n<p>\u4f60\u53ef\u4ee5\u5728 Redis \u4e0a\u6267\u884c INFO \u547d\u4ee4\uff0c\u67e5\u770b<code>latest_fork_usec<\/code>\u9879\uff0c\u5355\u4f4d\u5fae\u79d2\u3002<\/p>\n<pre><code class=\"language-bash\"># \u4e0a\u4e00\u6b21 fork \u8017\u65f6\uff0c\u5355\u4f4d\u5fae\u79d2\nlatest_fork_usec:59477<\/code><\/pre>\n<p>\u8fd9\u4e2a\u65f6\u95f4\u5c31\u662f\u4e3b\u8fdb\u7a0b\u5728 fork \u5b50\u8fdb\u7a0b\u671f\u95f4\uff0c\u6574\u4e2a\u5b9e\u4f8b\u963b\u585e\u65e0\u6cd5\u5904\u7406\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u65f6\u95f4\u3002<\/p>\n<p>\u5982\u679c\u4f60\u53d1\u73b0\u8fd9\u4e2a\u8017\u65f6\u5f88\u4e45\uff0c\u5c31\u8981\u8b66\u60d5\u8d77\u6765\u4e86\uff0c\u8fd9\u610f\u5473\u5728\u8fd9\u671f\u95f4\uff0c\u4f60\u7684\u6574\u4e2a Redis \u5b9e\u4f8b\u90fd\u5904\u4e8e\u4e0d\u53ef\u7528\u7684\u72b6\u6001\u3002<\/p>\n<p>\u9664\u4e86\u6570\u636e\u6301\u4e45\u5316\u4f1a\u751f\u6210 RDB \u4e4b\u5916\uff0c\u5f53\u4e3b\u4ece\u8282\u70b9\u7b2c\u4e00\u6b21\u5efa\u7acb\u6570\u636e\u540c\u6b65\u65f6\uff0c\u4e3b\u8282\u70b9\u4e5f\u521b\u5efa\u5b50\u8fdb\u7a0b\u751f\u6210 RDB\uff0c\u7136\u540e\u53d1\u7ed9\u4ece\u8282\u70b9\u8fdb\u884c\u4e00\u6b21\u5168\u91cf\u540c\u6b65\uff0c\u6240\u4ee5\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u4e5f\u4f1a\u5bf9 Redis \u4ea7\u751f\u6027\u80fd\u5f71\u54cd\u3002<\/p>\n<p>\u8981\u60f3\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u4f60\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u65b9\u6848\u8fdb\u884c\u4f18\u5316\uff1a<\/p>\n<ul>\n<li>\u63a7\u5236 Redis \u5b9e\u4f8b\u7684\u5185\u5b58\uff1a\u5c3d\u91cf\u5728 10G \u4ee5\u4e0b\uff0c\u6267\u884c fork \u7684\u8017\u65f6\u4e0e\u5b9e\u4f8b\u5927\u5c0f\u6709\u5173\uff0c\u5b9e\u4f8b\u8d8a\u5927\uff0c\u8017\u65f6\u8d8a\u4e45<\/li>\n<li>\u5408\u7406\u914d\u7f6e\u6570\u636e\u6301\u4e45\u5316\u7b56\u7565\uff1a\u5728<code>slave<\/code>\u8282\u70b9\u6267\u884c RDB \u5907\u4efd\uff0c\u63a8\u8350\u5728\u4f4e\u5cf0\u671f\u6267\u884c\uff0c\u800c\u5bf9\u4e8e\u4e22\u5931\u6570\u636e\u4e0d\u654f\u611f\u7684\u4e1a\u52a1\uff08\u4f8b\u5982\u628a Redis \u5f53\u505a\u7eaf\u7f13\u5b58\u4f7f\u7528\uff09\uff0c\u53ef\u4ee5\u5173\u95ed AOF \u548c AOF rewrite<\/li>\n<li>Redis \u5b9e\u4f8b\u4e0d\u8981\u90e8\u7f72\u5728\u865a\u62df\u673a\u4e0a\uff1afork \u7684\u8017\u65f6\u4e5f\u4e0e\u7cfb\u7edf\u4e5f\u6709\u5173\uff0c\u865a\u62df\u673a\u6bd4\u7269\u7406\u673a\u8017\u65f6\u66f4\u4e45<\/li>\n<li>\u964d\u4f4e\u4e3b\u4ece\u5e93\u5168\u91cf\u540c\u6b65\u7684\u6982\u7387\uff1a\u9002\u5f53\u8c03\u5927<code>repl-backlog-size<\/code>\u53c2\u6570\uff0c\u907f\u514d\u4e3b\u4ece\u5168\u91cf\u540c\u6b65<\/li>\n<\/ul>\n<h2>\u5f00\u542f\u5185\u5b58\u5927\u9875<\/h2>\n<p>\u9664\u4e86\u4e0a\u9762\u8bb2\u5230\u7684\u5b50\u8fdb\u7a0b RDB \u548c AOF rewrite \u671f\u95f4\uff0cfork \u8017\u65f6\u5bfc\u81f4\u7684\u5ef6\u65f6\u53d8\u5927\u4e4b\u5916\uff0c\u8fd9\u91cc\u8fd8\u6709\u4e00\u4e2a\u65b9\u9762\u4e5f\u4f1a\u5bfc\u81f4\u6027\u80fd\u95ee\u9898\uff0c\u8fd9\u5c31\u662f\u64cd\u4f5c\u7cfb\u7edf\u662f\u5426\u5f00\u542f\u4e86<strong>\u5185\u5b58\u5927\u9875\u673a\u5236<\/strong>\u3002<\/p>\n<p><strong>\u4ec0\u4e48\u662f\u5185\u5b58\u5927\u9875\uff1f<\/strong><\/p>\n<p>\u6211\u4eec\u90fd\u77e5\u9053\uff0c\u5e94\u7528\u7a0b\u5e8f\u5411\u64cd\u4f5c\u7cfb\u7edf\u7533\u8bf7\u5185\u5b58\u65f6\uff0c\u662f\u6309<strong>\u5185\u5b58\u9875<\/strong>\u8fdb\u884c\u7533\u8bf7\u7684\uff0c\u800c\u5e38\u89c4\u7684\u5185\u5b58\u9875\u5927\u5c0f\u662f 4KB\u3002<\/p>\n<p>Linux \u5185\u6838\u4ece 2.6.38 \u5f00\u59cb\uff0c\u652f\u6301\u4e86<strong>\u5185\u5b58\u5927\u9875\u673a\u5236<\/strong>\uff0c\u8be5\u673a\u5236\u5141\u8bb8\u5e94\u7528\u7a0b\u5e8f\u4ee5 2MB \u5927\u5c0f\u4e3a\u5355\u4f4d\uff0c\u5411\u64cd\u4f5c\u7cfb\u7edf\u7533\u8bf7\u5185\u5b58\u3002<\/p>\n<p>\u5e94\u7528\u7a0b\u5e8f\u6bcf\u6b21\u5411\u64cd\u4f5c\u7cfb\u7edf\u7533\u8bf7\u7684\u5185\u5b58\u5355\u4f4d\u53d8\u5927\u4e86\uff0c\u4f46\u8fd9\u4e5f\u610f\u5473\u7740\u7533\u8bf7\u5185\u5b58\u7684\u8017\u65f6\u53d8\u957f\u3002<\/p>\n<p><strong>\u8fd9\u5bf9 Redis \u4f1a\u6709\u4ec0\u4e48\u5f71\u54cd\u5462\uff1f<\/strong><\/p>\n<p>\u5f53 Redis \u5728\u6267\u884c\u540e\u53f0 RDB \u548c AOF rewrite \u65f6\uff0c\u91c7\u7528 fork \u5b50\u8fdb\u7a0b\u7684\u65b9\u5f0f\u6765\u5904\u7406\u3002\u4f46\u4e3b\u8fdb\u7a0b fork \u5b50\u8fdb\u7a0b\u540e\uff0c\u6b64\u65f6\u7684<strong>\u4e3b\u8fdb\u7a0b\u4f9d\u65e7\u662f\u53ef\u4ee5\u63a5\u6536\u5199\u8bf7\u6c42\u7684<\/strong>\uff0c\u800c\u8fdb\u6765\u7684\u5199\u8bf7\u6c42\uff0c\u4f1a\u91c7\u7528 Copy On Write\uff08\u5199\u65f6\u590d\u5236\uff09\u7684\u65b9\u5f0f\u64cd\u4f5c\u5185\u5b58\u6570\u636e\u3002<\/p>\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e3b\u8fdb\u7a0b\u4e00\u65e6\u6709\u6570\u636e\u9700\u8981\u4fee\u6539\uff0cRedis \u5e76\u4e0d\u4f1a\u76f4\u63a5\u4fee\u6539\u73b0\u6709\u5185\u5b58\u4e2d\u7684\u6570\u636e\uff0c\u800c\u662f<strong>\u5148\u5c06\u8fd9\u5757\u5185\u5b58\u6570\u636e\u62f7\u8d1d\u51fa\u6765\uff0c\u518d\u4fee\u6539\u8fd9\u5757\u65b0\u5185\u5b58\u7684\u6570\u636e<\/strong>\uff0c\u8fd9\u5c31\u662f\u6240\u8c13\u7684\u300c\u5199\u65f6\u590d\u5236\u300d\u3002<\/p>\n<p>\u5199\u65f6\u590d\u5236\u4f60\u4e5f\u53ef\u4ee5\u7406\u89e3\u6210\uff0c\u8c01\u9700\u8981\u53d1\u751f\u5199\u64cd\u4f5c\uff0c\u8c01\u5c31\u9700\u8981\u5148\u62f7\u8d1d\uff0c\u518d\u4fee\u6539\u3002<\/p>\n<p>\u8fd9\u6837\u505a\u7684\u597d\u5904\u662f\uff0c\u7236\u8fdb\u7a0b\u6709\u4efb\u4f55\u5199\u64cd\u4f5c\uff0c\u5e76\u4e0d\u4f1a\u5f71\u54cd\u5b50\u8fdb\u7a0b\u7684\u6570\u636e\u6301\u4e45\u5316\uff08\u5b50\u8fdb\u7a0b\u53ea\u6301\u4e45\u5316 fork \u8fd9\u4e00\u77ac\u95f4\u6574\u4e2a\u5b9e\u4f8b\u4e2d\u7684\u6240\u6709\u6570\u636e\u5373\u53ef\uff0c\u4e0d\u5173\u5fc3\u65b0\u7684\u6570\u636e\u53d8\u66f4\uff0c\u56e0\u4e3a\u5b50\u8fdb\u7a0b\u53ea\u9700\u8981\u4e00\u4efd\u5185\u5b58\u5feb\u7167\uff0c\u7136\u540e\u6301\u4e45\u5316\u5230\u78c1\u76d8\u4e0a\uff09\u3002<\/p>\n<p>\u4f46\u662f\u8bf7\u6ce8\u610f\uff0c\u4e3b\u8fdb\u7a0b\u5728\u62f7\u8d1d\u5185\u5b58\u6570\u636e\u65f6\uff0c\u8fd9\u4e2a\u9636\u6bb5\u5c31\u6d89\u53ca\u5230\u65b0\u5185\u5b58\u7684\u7533\u8bf7\uff0c\u5982\u679c\u6b64\u65f6\u64cd\u4f5c\u7cfb\u7edf\u5f00\u542f\u4e86\u5185\u5b58\u5927\u9875\uff0c\u90a3\u4e48\u5728\u6b64\u671f\u95f4\uff0c\u5ba2\u6237\u7aef\u5373\u4fbf\u53ea\u4fee\u6539 10B \u7684\u6570\u636e\uff0c<strong>Redis \u5728\u7533\u8bf7\u5185\u5b58\u65f6\u4e5f\u4f1a\u4ee5 2MB \u4e3a\u5355\u4f4d\u5411\u64cd\u4f5c\u7cfb\u7edf\u7533\u8bf7\uff0c\u7533\u8bf7\u5185\u5b58\u7684\u8017\u65f6\u53d8\u957f\uff0c\u8fdb\u800c\u5bfc\u81f4\u6bcf\u4e2a\u5199\u8bf7\u6c42\u7684\u5ef6\u8fdf\u589e\u52a0\uff0c\u5f71\u54cd\u5230 Redis \u6027\u80fd<\/strong>\u3002<\/p>\n<p>\u540c\u6837\u5730\uff0c\u5982\u679c\u8fd9\u4e2a\u5199\u8bf7\u6c42\u64cd\u4f5c\u7684\u662f\u4e00\u4e2a bigkey\uff0c\u90a3\u4e3b\u8fdb\u7a0b\u5728\u62f7\u8d1d\u8fd9\u4e2a bigkey \u5185\u5b58\u5757\u65f6\uff0c\u4e00\u6b21\u7533\u8bf7\u7684\u5185\u5b58\u4f1a\u66f4\u5927\uff0c\u65f6\u95f4\u4e5f\u4f1a\u66f4\u4e45\u3002\u53ef\u89c1\uff0cbigkey \u5728\u8fd9\u91cc\u53c8\u4e00\u6b21\u5f71\u54cd\u5230\u4e86\u6027\u80fd\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.yezhou.me\/AppBlog\/images\/\u8fd0\u7ef4\/\u6392\u67e5Redis\u6027\u80fd\u95ee\u9898-\u5f00\u542f\u5185\u5b58\u5927\u9875.png\" alt=\"\u6392\u67e5Redis\u6027\u80fd\u95ee\u9898-\u5f00\u542f\u5185\u5b58\u5927\u9875\" \/><\/p>\n<p><strong>\u90a3\u5982\u4f55\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff1f<\/strong><\/p>\n<p>\u5f88\u7b80\u5355\uff0c\u4f60\u53ea\u9700\u8981\u5173\u95ed\u5185\u5b58\u5927\u9875\u673a\u5236\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n<p>\u9996\u5148\uff0c\u4f60\u9700\u8981\u67e5\u770b Redis \u673a\u5668\u662f\u5426\u5f00\u542f\u4e86\u5185\u5b58\u5927\u9875\uff1a<\/p>\n<pre><code class=\"language-bash\">$ cat \/sys\/kernel\/mm\/transparent_hugepage\/enabled\n[always] madvise never<\/code><\/pre>\n<p>\u5982\u679c\u8f93\u51fa\u9009\u9879\u662f always\uff0c\u5c31\u8868\u793a\u76ee\u524d\u5f00\u542f\u4e86\u5185\u5b58\u5927\u9875\u673a\u5236\uff0c\u6211\u4eec\u9700\u8981\u5173\u6389\u5b83\uff1a<\/p>\n<pre><code class=\"language-bash\">$ echo never &gt; \/sys\/kernel\/mm\/transparent_hugepage\/enabled<\/code><\/pre>\n<p>\u5176\u5b9e\uff0c\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u7684\u5185\u5b58\u5927\u9875\u673a\u5236\uff0c\u5176\u4f18\u52bf\u662f\uff0c\u53ef\u4ee5\u5728\u4e00\u5b9a\u7a0b\u5e8f\u4e0a\u964d\u4f4e\u5e94\u7528\u7a0b\u5e8f\u7533\u8bf7\u5185\u5b58\u7684\u6b21\u6570\u3002<\/p>\n<p>\u4f46\u662f\u5bf9\u4e8e Redis \u8fd9\u79cd\u5bf9\u6027\u80fd\u548c\u5ef6\u8fdf\u6781\u5176\u654f\u611f\u7684\u6570\u636e\u5e93\u6765\u8bf4\uff0c\u6211\u4eec\u5e0c\u671b Redis \u5728\u6bcf\u6b21\u7533\u8bf7\u5185\u5b58\u65f6\uff0c\u8017\u65f6\u5c3d\u91cf\u77ed\uff0c\u6240\u4ee5\u6211\u4e0d\u5efa\u8bae\u4f60\u5728 Redis \u673a\u5668\u4e0a\u5f00\u542f\u8fd9\u4e2a\u673a\u5236\u3002<\/p>\n<h2>\u5f00\u542fAOF<\/h2>\n<p>\u524d\u9762\u6211\u4eec\u5206\u6790\u4e86 RDB \u548c AOF rewrite \u5bf9 Redis \u6027\u80fd\u7684\u5f71\u54cd\uff0c\u4e3b\u8981\u5173\u6ce8\u70b9\u5728 fork \u4e0a\u3002<\/p>\n<p>\u5176\u5b9e\uff0c\u5173\u4e8e\u6570\u636e\u6301\u4e45\u5316\u65b9\u9762\uff0c\u8fd8\u6709\u5f71\u54cd Redis \u6027\u80fd\u7684\u56e0\u7d20\uff0c\u8fd9\u6b21\u6211\u4eec\u91cd\u70b9\u6765\u770b AOF \u6570\u636e\u6301\u4e45\u5316\u3002<\/p>\n<p>\u5982\u679c\u4f60\u7684 AOF \u914d\u7f6e\u4e0d\u5408\u7406\uff0c\u8fd8\u662f\u6709\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6027\u80fd\u95ee\u9898\u3002<\/p>\n<p><strong>\u5f53 Redis \u5f00\u542f AOF \u540e\uff0c\u5176\u5de5\u4f5c\u539f\u7406\u5982\u4e0b<\/strong>\uff1a<\/p>\n<ul>\n<li>Redis \u6267\u884c\u5199\u547d\u4ee4\u540e\uff0c\u628a\u8fd9\u4e2a\u547d\u4ee4\u5199\u5165\u5230 AOF \u6587\u4ef6\u5185\u5b58\u4e2d\uff08write \u7cfb\u7edf\u8c03\u7528\uff09<\/li>\n<li>Redis \u6839\u636e\u914d\u7f6e\u7684 AOF \u5237\u76d8\u7b56\u7565\uff0c\u628a AOF \u5185\u5b58\u6570\u636e\u5237\u5230\u78c1\u76d8\u4e0a\uff08fsync \u7cfb\u7edf\u8c03\u7528\uff09<\/li>\n<\/ul>\n<p>\u4e3a\u4e86\u4fdd\u8bc1 AOF \u6587\u4ef6\u6570\u636e\u7684\u5b89\u5168\u6027\uff0cRedis \u63d0\u4f9b\u4e86 3 \u79cd\u5237\u76d8\u673a\u5236\uff1a<\/p>\n<ul>\n<li><code>appendfsync always<\/code>\uff1a\u4e3b\u7ebf\u7a0b\u6bcf\u6b21\u6267\u884c\u5199\u64cd\u4f5c\u540e\u7acb\u5373\u5237\u76d8\uff0c\u6b64\u65b9\u6848\u4f1a\u5360\u7528\u6bd4\u8f83\u5927\u7684\u78c1\u76d8 IO \u8d44\u6e90\uff0c\u4f46\u6570\u636e\u5b89\u5168\u6027\u6700\u9ad8<\/li>\n<li><code>appendfsync no<\/code>\uff1a\u4e3b\u7ebf\u7a0b\u6bcf\u6b21\u5199\u64cd\u4f5c\u53ea\u5199\u5185\u5b58\u5c31\u8fd4\u56de\uff0c\u5185\u5b58\u6570\u636e\u4ec0\u4e48\u65f6\u5019\u5237\u5230\u78c1\u76d8\uff0c\u4ea4\u7531\u64cd\u4f5c\u7cfb\u7edf\u51b3\u5b9a\uff0c\u6b64\u65b9\u6848\u5bf9\u6027\u80fd\u5f71\u54cd\u6700\u5c0f\uff0c\u4f46\u6570\u636e\u5b89\u5168\u6027\u4e5f\u6700\u4f4e\uff0cRedis \u5b95\u673a\u65f6\u4e22\u5931\u7684\u6570\u636e\u53d6\u51b3\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u5237\u76d8\u65f6\u673a<\/li>\n<li><code>appendfsync everysec<\/code>\uff1a\u4e3b\u7ebf\u7a0b\u6bcf\u6b21\u5199\u64cd\u4f5c\u53ea\u5199\u5185\u5b58\u5c31\u8fd4\u56de\uff0c\u7136\u540e\u7531\u540e\u53f0\u7ebf\u7a0b\u6bcf\u9694 1 \u79d2\u6267\u884c\u4e00\u6b21\u5237\u76d8\u64cd\u4f5c\uff08\u89e6\u53d1fsync\u7cfb\u7edf\u8c03\u7528\uff09\uff0c\u6b64\u65b9\u6848\u5bf9\u6027\u80fd\u5f71\u54cd\u76f8\u5bf9\u8f83\u5c0f\uff0c\u4f46\u5f53 Redis \u5b95\u673a\u65f6\u4f1a\u4e22\u5931 1 \u79d2\u7684\u6570\u636e<\/li>\n<\/ul>\n<p>\u4e0b\u9762\u6211\u4eec\u4f9d\u6b21\u6765\u5206\u6790\uff0c\u8fd9\u51e0\u4e2a\u673a\u5236\u5bf9\u6027\u80fd\u7684\u5f71\u54cd\u3002<\/p>\n<p>\u5982\u679c\u4f60\u7684 AOF \u914d\u7f6e\u4e3a<code>appendfsync always<\/code>\uff0c\u90a3\u4e48 Redis \u6bcf\u5904\u7406\u4e00\u6b21\u5199\u64cd\u4f5c\uff0c\u90fd\u4f1a\u628a\u8fd9\u4e2a\u547d\u4ee4\u5199\u5165\u5230\u78c1\u76d8\u4e2d\u624d\u8fd4\u56de\uff0c\u6574\u4e2a\u8fc7\u7a0b\u90fd\u662f\u5728\u4e3b\u7ebf\u7a0b\u6267\u884c\u7684\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u5fc5\u7136\u4f1a\u52a0\u91cd Redis \u5199\u8d1f\u62c5\u3002<\/p>\n<p>\u539f\u56e0\u4e5f\u5f88\u7b80\u5355\uff0c\u64cd\u4f5c\u78c1\u76d8\u8981\u6bd4\u64cd\u4f5c\u5185\u5b58\u6162\u51e0\u767e\u500d\uff0c\u91c7\u7528\u8fd9\u4e2a\u914d\u7f6e\u4f1a\u4e25\u91cd\u62d6\u6162 Redis \u7684\u6027\u80fd\uff0c\u56e0\u6b64\u6211<strong>\u4e0d\u5efa\u8bae\u4f60\u628a AOF \u5237\u76d8\u65b9\u5f0f\u914d\u7f6e\u4e3a always<\/strong>\u3002<\/p>\n<p>\u6211\u4eec\u63a5\u7740\u6765\u770b<code>appendfsync no<\/code>\u914d\u7f6e\u9879\u3002<\/p>\n<p>\u5728\u8fd9\u79cd\u914d\u7f6e\u4e0b\uff0cRedis \u6bcf\u6b21\u5199\u64cd\u4f5c\u53ea\u5199\u5185\u5b58\uff0c\u4ec0\u4e48\u65f6\u5019\u628a\u5185\u5b58\u4e2d\u7684\u6570\u636e\u5237\u5230\u78c1\u76d8\uff0c\u4ea4\u7ed9\u64cd\u4f5c\u7cfb\u7edf\u51b3\u5b9a\uff0c\u6b64\u65b9\u6848\u5bf9 Redis \u7684\u6027\u80fd\u5f71\u54cd\u6700\u5c0f\uff0c\u4f46\u5f53 Redis \u5b95\u673a\u65f6\uff0c\u4f1a\u4e22\u5931\u4e00\u90e8\u5206\u6570\u636e\uff0c\u4e3a\u4e86\u6570\u636e\u7684\u5b89\u5168\u6027\uff0c\u4e00\u822c\u6211\u4eec\u4e5f\u4e0d\u91c7\u53d6\u8fd9\u79cd\u914d\u7f6e\u3002<\/p>\n<blockquote>\n<p>\u5982\u679c\u4f60\u7684 Redis \u53ea\u7528\u4f5c\u7eaf\u7f13\u5b58\uff0c\u5bf9\u4e8e\u6570\u636e\u4e22\u5931\u4e0d\u654f\u611f\uff0c\u91c7\u7528\u914d\u7f6e<code>appendfsync no<\/code>\u4e5f\u662f\u53ef\u4ee5\u7684\u3002<\/p>\n<\/blockquote>\n<p>\u770b\u5230\u8fd9\u91cc\uff0c\u6211\u731c\u4f60\u80af\u5b9a\u548c\u5927\u591a\u6570\u4eba\u7684\u60f3\u6cd5\u4e00\u6837\uff0c\u9009\u6bd4\u8f83\u6298\u4e2d\u7684\u65b9\u6848<code>appendfsync everysec<\/code>\u5c31\u6ca1\u95ee\u9898\u4e86\u5427\uff1f<\/p>\n<p>\u8fd9\u4e2a\u65b9\u6848\u4f18\u52bf\u5728\u4e8e\uff0cRedis \u4e3b\u7ebf\u7a0b\u5199\u5b8c\u5185\u5b58\u540e\u5c31\u8fd4\u56de\uff0c\u5177\u4f53\u7684\u5237\u76d8\u64cd\u4f5c\u662f\u653e\u5230\u540e\u53f0\u7ebf\u7a0b\u4e2d\u6267\u884c\u7684\uff0c\u540e\u53f0\u7ebf\u7a0b\u6bcf\u9694 1 \u79d2\u628a\u5185\u5b58\u4e2d\u7684\u6570\u636e\u5237\u5230\u78c1\u76d8\u4e2d\u3002<\/p>\n<p>\u8fd9\u79cd\u65b9\u6848\u65e2\u517c\u987e\u4e86\u6027\u80fd\uff0c\u53c8\u5c3d\u53ef\u80fd\u5730\u4fdd\u8bc1\u4e86\u6570\u636e\u5b89\u5168\uff0c\u662f\u4e0d\u662f\u89c9\u5f97\u5f88\u5b8c\u7f8e\uff1f<\/p>\n<p><strong>\u4f46\u662f\uff0c\u8fd9\u91cc\u6211\u8981\u7ed9\u4f60\u6cfc\u4e00\u76c6\u51b7\u6c34\u4e86\uff0c\u91c7\u7528\u8fd9\u79cd\u65b9\u6848\u4f60\u4e5f\u8981\u8b66\u60d5\u4e00\u4e0b\uff0c\u56e0\u4e3a\u8fd9\u79cd\u65b9\u6848\u8fd8\u662f\u5b58\u5728\u5bfc\u81f4 Redis \u5ef6\u8fdf\u53d8\u5927\u7684\u60c5\u51b5\u53d1\u751f\uff0c\u751a\u81f3\u4f1a\u963b\u585e\u6574\u4e2a Redis<\/strong>\u3002<\/p>\n<p>\u8fd9\u662f\u4e3a\u4ec0\u4e48\uff1f\u6211\u628a AOF \u6700\u8017\u65f6\u7684\u5237\u76d8\u64cd\u4f5c\uff0c\u653e\u5230\u540e\u53f0\u7ebf\u7a0b\u4e2d\u4e5f\u4f1a\u5f71\u54cd\u5230 Redis \u4e3b\u7ebf\u7a0b\uff1f<\/p>\n<p>\u4f60\u8bd5\u60f3\u8fd9\u6837\u4e00\u79cd\u60c5\u51b5\uff1a\u5f53 Redis \u540e\u53f0\u7ebf\u7a0b\u5728\u6267\u884c AOF \u6587\u4ef6\u5237\u76d8\u65f6\uff0c\u5982\u679c\u6b64\u65f6\u78c1\u76d8\u7684 IO \u8d1f\u8f7d\u5f88\u9ad8\uff0c\u90a3\u8fd9\u4e2a\u540e\u53f0\u7ebf\u7a0b\u5728\u6267\u884c\u5237\u76d8\u64cd\u4f5c\uff08fsync\u7cfb\u7edf\u8c03\u7528\uff09\u65f6\u5c31\u4f1a\u88ab\u963b\u585e\u4f4f\u3002<\/p>\n<p>\u6b64\u65f6\u7684\u4e3b\u7ebf\u7a0b\u4f9d\u65e7\u4f1a\u63a5\u6536\u5199\u8bf7\u6c42\uff0c\u7d27\u63a5\u7740\uff0c\u4e3b\u7ebf\u7a0b\u53c8\u9700\u8981\u628a\u6570\u636e\u5199\u5230\u6587\u4ef6\u5185\u5b58\u4e2d\uff08write \u7cfb\u7edf\u8c03\u7528\uff09\uff0c\u4f46\u6b64\u65f6\u7684\u540e\u53f0\u5b50\u7ebf\u7a0b\u7531\u4e8e\u78c1\u76d8\u8d1f\u8f7d\u8fc7\u9ad8\uff0c\u5bfc\u81f4 fsync \u53d1\u751f\u963b\u585e\uff0c\u8fdf\u8fdf\u4e0d\u80fd\u8fd4\u56de\uff0c\u90a3\u4e3b\u7ebf\u7a0b\u5728\u6267\u884c write \u7cfb\u7edf\u8c03\u7528\u65f6\uff0c\u4e5f\u4f1a\u88ab\u963b\u585e\u4f4f\uff0c\u76f4\u5230\u540e\u53f0\u7ebf\u7a0b fsync \u6267\u884c\u5b8c\u6210\u540e\uff0c\u4e3b\u7ebf\u7a0b\u6267\u884c write \u624d\u80fd\u6210\u529f\u8fd4\u56de\u3002<\/p>\n<p>\u770b\u5230\u4e86\u4e48\uff1f\u5728\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\uff0c\u4e3b\u7ebf\u7a0b\u4f9d\u65e7\u6709\u963b\u585e\u7684\u98ce\u9669\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.yezhou.me\/AppBlog\/images\/\u8fd0\u7ef4\/\u6392\u67e5Redis\u6027\u80fd\u95ee\u9898-\u5f00\u542fAOF.png\" alt=\"\u6392\u67e5Redis\u6027\u80fd\u95ee\u9898-\u5f00\u542fAOF\" \/><\/p>\n<p>\u6240\u4ee5\uff0c\u5c3d\u7ba1\u4f60\u7684 AOF \u914d\u7f6e\u4e3a<code>appendfsync everysec<\/code>\uff0c\u4e5f\u4e0d\u80fd\u6389\u4ee5\u8f7b\u5fc3\uff0c\u8981\u8b66\u60d5\u78c1\u76d8\u538b\u529b\u8fc7\u5927\u5bfc\u81f4\u7684 Redis \u6709\u6027\u80fd\u95ee\u9898\u3002<\/p>\n<p>\u90a3\u4ec0\u4e48\u60c5\u51b5\u4e0b\u4f1a\u5bfc\u81f4\u78c1\u76d8 IO \u8d1f\u8f7d\u8fc7\u5927\uff1f\u4ee5\u53ca\u5982\u4f55\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u5462\uff1f<\/p>\n<p>\u6211\u603b\u7ed3\u4e86\u4ee5\u4e0b\u51e0\u79cd\u60c5\u51b5\uff0c\u4f60\u53ef\u4ee5\u53c2\u8003\u8fdb\u884c\u95ee\u9898\u6392\u67e5\uff1a<\/p>\n<ul>\n<li>\u5b50\u8fdb\u7a0b\u6b63\u5728\u6267\u884c AOF rewrite\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u4f1a\u5360\u7528\u5927\u91cf\u7684\u78c1\u76d8 IO \u8d44\u6e90<\/li>\n<li>\u6709\u5176\u4ed6\u5e94\u7528\u7a0b\u5e8f\u5728\u6267\u884c\u5927\u91cf\u7684\u5199\u6587\u4ef6\u64cd\u4f5c\uff0c\u4e5f\u4f1a\u5360\u7528\u78c1\u76d8 IO \u8d44\u6e90<\/li>\n<\/ul>\n<p>\u5bf9\u4e8e\u60c5\u51b51\uff0c\u8bf4\u767d\u4e86\u5c31\u662f\uff0cRedis \u7684 AOF \u540e\u53f0\u5b50\u7ebf\u7a0b\u5237\u76d8\u64cd\u4f5c\uff0c\u649e\u4e0a\u4e86\u5b50\u8fdb\u7a0b AOF rewrite\uff01<\/p>\n<p>\u8fd9\u600e\u4e48\u529e\uff1f\u96be\u9053\u8981\u5173\u95ed AOF rewrite \u624d\u884c\uff1f<\/p>\n<p>\u5e78\u8fd0\u7684\u662f\uff0cRedis \u63d0\u4f9b\u4e86\u4e00\u4e2a\u914d\u7f6e\u9879\uff0c\u5f53\u5b50\u8fdb\u7a0b\u5728 AOF rewrite \u671f\u95f4\uff0c\u53ef\u4ee5\u8ba9\u540e\u53f0\u5b50\u7ebf\u7a0b\u4e0d\u6267\u884c\u5237\u76d8\uff08\u4e0d\u89e6\u53d1 fsync \u7cfb\u7edf\u8c03\u7528\uff09\u64cd\u4f5c\u3002<\/p>\n<p>\u8fd9\u76f8\u5f53\u4e8e\u5728 AOF rewrite \u671f\u95f4\uff0c\u4e34\u65f6\u628a appendfsync \u8bbe\u7f6e\u4e3a\u4e86 none\uff0c\u914d\u7f6e\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-bash\"># AOF rewrite \u671f\u95f4\uff0cAOF \u540e\u53f0\u5b50\u7ebf\u7a0b\u4e0d\u8fdb\u884c\u5237\u76d8\u64cd\u4f5c\n# \u76f8\u5f53\u4e8e\u5728\u8fd9\u671f\u95f4\uff0c\u4e34\u65f6\u628a appendfsync \u8bbe\u7f6e\u4e3a\u4e86 none\nno-appendfsync-on-rewrite yes<\/code><\/pre>\n<p>\u5f53\u7136\uff0c\u5f00\u542f\u8fd9\u4e2a\u914d\u7f6e\u9879\uff0c\u5728 AOF rewrite \u671f\u95f4\uff0c\u5982\u679c\u5b9e\u4f8b\u53d1\u751f\u5b95\u673a\uff0c\u90a3\u4e48\u6b64\u65f6\u4f1a\u4e22\u5931\u66f4\u591a\u7684\u6570\u636e\uff0c\u6027\u80fd\u548c\u6570\u636e\u5b89\u5168\u6027\uff0c\u4f60\u9700\u8981\u6743\u8861\u540e\u8fdb\u884c\u9009\u62e9\u3002<\/p>\n<p>\u5982\u679c\u5360\u7528\u78c1\u76d8\u8d44\u6e90\u7684\u662f\u5176\u4ed6\u5e94\u7528\u7a0b\u5e8f\uff0c\u90a3\u5c31\u6bd4\u8f83\u7b80\u5355\u4e86\uff0c\u4f60\u9700\u8981\u5b9a\u4f4d\u5230\u662f\u54ea\u4e2a\u5e94\u7528\u7a0b\u5e8f\u5728\u5927\u91cf\u5199\u78c1\u76d8\uff0c\u7136\u540e\u628a\u8fd9\u4e2a\u5e94\u7528\u7a0b\u5e8f\u8fc1\u79fb\u5230\u5176\u4ed6\u673a\u5668\u4e0a\u6267\u884c\u5c31\u597d\u4e86\uff0c\u907f\u514d\u5bf9 Redis \u4ea7\u751f\u5f71\u54cd\u3002<\/p>\n<p>\u5f53\u7136\uff0c\u5982\u679c\u4f60\u5bf9 Redis \u7684\u6027\u80fd\u548c\u6570\u636e\u5b89\u5168\u90fd\u6709\u5f88\u9ad8\u7684\u8981\u6c42\uff0c\u90a3\u4e48\u6211\u5efa\u8bae\u4ece<strong>\u786c\u4ef6\u5c42\u9762<\/strong>\u6765\u4f18\u5316\uff0c\u66f4\u6362\u4e3a SSD \u78c1\u76d8\uff0c\u63d0\u9ad8\u78c1\u76d8\u7684 IO \u80fd\u529b\uff0c\u4fdd\u8bc1 AOF \u671f\u95f4\u6709\u5145\u8db3\u7684\u78c1\u76d8\u8d44\u6e90\u53ef\u4ee5\u4f7f\u7528\u3002<\/p>\n<h2>\u7ed1\u5b9aCPU<\/h2>\n<p>\u5f88\u591a\u65f6\u5019\uff0c\u6211\u4eec\u5728\u90e8\u7f72\u670d\u52a1\u65f6\uff0c\u4e3a\u4e86\u63d0\u9ad8\u670d\u52a1\u6027\u80fd\uff0c\u964d\u4f4e\u5e94\u7528\u7a0b\u5e8f\u5728\u591a\u4e2a CPU \u6838\u5fc3\u4e4b\u95f4\u7684\u4e0a\u4e0b\u6587\u5207\u6362\u5e26\u6765\u7684\u6027\u80fd\u635f\u8017\uff0c\u901a\u5e38\u91c7\u7528\u7684\u65b9\u6848\u662f\u8fdb\u7a0b\u7ed1\u5b9a CPU \u7684\u65b9\u5f0f\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<p>\u4f46\u5728\u90e8\u7f72 Redis \u65f6\uff0c\u5982\u679c\u4f60\u9700\u8981\u7ed1\u5b9a CPU \u6765\u63d0\u9ad8\u5176\u6027\u80fd\uff0c\u6211\u5efa\u8bae\u4f60\u4ed4\u7ec6\u659f\u914c\u540e\u518d\u505a\u64cd\u4f5c\u3002<\/p>\n<p>\u4e3a\u4ec0\u4e48\uff1f<\/p>\n<p>\u56e0\u4e3a Redis \u5728\u7ed1\u5b9a CPU \u65f6\uff0c\u662f\u6709\u5f88\u591a\u8003\u7a76\u7684\uff0c\u5982\u679c\u4f60\u4e0d\u4e86\u89e3 Redis \u7684\u8fd0\u884c\u539f\u7406\uff0c\u968f\u610f\u7ed1\u5b9a CPU \u4e0d\u4ec5\u4e0d\u4f1a\u63d0\u9ad8\u6027\u80fd\uff0c\u751a\u81f3\u6709\u53ef\u80fd\u4f1a\u5e26\u6765\u76f8\u53cd\u7684\u6548\u679c\u3002<\/p>\n<p>\u6211\u4eec\u90fd\u77e5\u9053\uff0c\u4e00\u822c\u73b0\u4ee3\u7684\u670d\u52a1\u5668\u4f1a\u6709\u591a\u4e2a CPU\uff0c\u800c\u6bcf\u4e2a CPU \u53c8\u5305\u542b\u591a\u4e2a\u7269\u7406\u6838\u5fc3\uff0c\u6bcf\u4e2a\u7269\u7406\u6838\u5fc3\u53c8\u5206\u4e3a\u591a\u4e2a\u903b\u8f91\u6838\u5fc3\uff0c\u6bcf\u4e2a\u7269\u7406\u6838\u4e0b\u7684\u903b\u8f91\u6838\u5171\u7528 L1\/L2 Cache\u3002<\/p>\n<p>\u800c Redis Server \u9664\u4e86\u4e3b\u7ebf\u7a0b\u670d\u52a1\u5ba2\u6237\u7aef\u8bf7\u6c42\u4e4b\u5916\uff0c\u8fd8\u4f1a\u521b\u5efa\u5b50\u8fdb\u7a0b\u3001\u5b50\u7ebf\u7a0b\u3002<\/p>\n<p><strong>\u5176\u4e2d\u5b50\u8fdb\u7a0b\u7528\u4e8e\u6570\u636e\u6301\u4e45\u5316\uff0c\u800c\u5b50\u7ebf\u7a0b\u7528\u4e8e\u6267\u884c\u4e00\u4e9b\u6bd4\u8f83\u8017\u65f6\u64cd\u4f5c\uff0c\u4f8b\u5982\u5f02\u6b65\u91ca\u653e fd\u3001\u5f02\u6b65 AOF \u5237\u76d8\u3001\u5f02\u6b65 lazy-free \u7b49\u7b49<\/strong>\u3002<\/p>\n<p>\u5982\u679c\u4f60\u628a Redis \u8fdb\u7a0b\u53ea\u7ed1\u5b9a\u4e86\u4e00\u4e2a CPU \u903b\u8f91\u6838\u5fc3\u4e0a\uff0c\u90a3\u4e48\u5f53 Redis \u5728\u8fdb\u884c\u6570\u636e\u6301\u4e45\u5316\u65f6\uff0cfork \u51fa\u7684\u5b50\u8fdb\u7a0b\u4f1a\u7ee7\u627f\u7236\u8fdb\u7a0b\u7684 CPU \u4f7f\u7528\u504f\u597d\u3002<\/p>\n<p><strong>\u800c\u6b64\u65f6\u7684\u5b50\u8fdb\u7a0b\u4f1a\u6d88\u8017\u5927\u91cf\u7684 CPU \u8d44\u6e90\u8fdb\u884c\u6570\u636e\u6301\u4e45\u5316\uff08\u628a\u5b9e\u4f8b\u6570\u636e\u5168\u90e8\u626b\u63cf\u51fa\u6765\u9700\u8981\u8017\u8d39CPU\uff09\uff0c\u8fd9\u5c31\u4f1a\u5bfc\u81f4\u5b50\u8fdb\u7a0b\u4f1a\u4e0e\u4e3b\u8fdb\u7a0b\u53d1\u751f CPU \u4e89\u62a2\uff0c\u8fdb\u800c\u5f71\u54cd\u5230\u4e3b\u8fdb\u7a0b\u670d\u52a1\u5ba2\u6237\u7aef\u8bf7\u6c42\uff0c\u8bbf\u95ee\u5ef6\u8fdf\u53d8\u5927<\/strong>\u3002<\/p>\n<p>\u8fd9\u5c31\u662f Redis \u7ed1\u5b9a CPU \u5e26\u6765\u7684\u6027\u80fd\u95ee\u9898\u3002<\/p>\n<p>\u90a3\u5982\u4f55\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u5462\uff1f<\/p>\n<p>\u5982\u679c\u4f60\u786e\u5b9e\u60f3\u8981\u7ed1\u5b9a CPU\uff0c\u53ef\u4ee5\u4f18\u5316\u7684\u65b9\u6848\u662f\uff0c\u4e0d\u8981\u8ba9 Redis \u8fdb\u7a0b\u53ea\u7ed1\u5b9a\u5728\u4e00\u4e2a CPU \u903b\u8f91\u6838\u4e0a\uff0c\u800c\u662f\u7ed1\u5b9a\u5728\u591a\u4e2a\u903b\u8f91\u6838\u5fc3\u4e0a\uff0c\u800c\u4e14\uff0c\u7ed1\u5b9a\u7684\u591a\u4e2a\u903b\u8f91\u6838\u5fc3\u6700\u597d\u662f\u540c\u4e00\u4e2a\u7269\u7406\u6838\u5fc3\uff0c\u8fd9\u6837\u5b83\u4eec\u8fd8\u53ef\u4ee5\u5171\u7528 L1\/L2 Cache\u3002<\/p>\n<p>\u5f53\u7136\uff0c\u5373\u4fbf\u6211\u4eec\u628a Redis \u7ed1\u5b9a\u5728\u591a\u4e2a\u903b\u8f91\u6838\u5fc3\u4e0a\uff0c\u4e5f\u53ea\u80fd\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u7f13\u89e3\u4e3b\u7ebf\u7a0b\u3001\u5b50\u8fdb\u7a0b\u3001\u540e\u53f0\u7ebf\u7a0b\u5728 CPU \u8d44\u6e90\u4e0a\u7684\u7ade\u4e89\u3002<\/p>\n<p>\u56e0\u4e3a\u8fd9\u4e9b\u5b50\u8fdb\u7a0b\u3001\u5b50\u7ebf\u7a0b\u8fd8\u662f\u4f1a\u5728\u8fd9\u591a\u4e2a\u903b\u8f91\u6838\u5fc3\u4e0a\u8fdb\u884c\u5207\u6362\uff0c\u5b58\u5728\u6027\u80fd\u635f\u8017\u3002<\/p>\n<p><strong>\u5982\u4f55\u518d\u8fdb\u4e00\u6b65\u4f18\u5316\uff1f<\/strong><\/p>\n<p>\u53ef\u80fd\u4f60\u5df2\u7ecf\u60f3\u5230\u4e86\uff0c\u6211\u4eec\u662f\u5426\u53ef\u4ee5\u8ba9\u4e3b\u7ebf\u7a0b\u3001\u5b50\u8fdb\u7a0b\u3001\u540e\u53f0\u7ebf\u7a0b\uff0c\u5206\u522b\u7ed1\u5b9a\u5728\u56fa\u5b9a\u7684 CPU \u6838\u5fc3\u4e0a\uff0c\u4e0d\u8ba9\u5b83\u4eec\u6765\u56de\u5207\u6362\uff0c\u8fd9\u6837\u4e00\u6765\uff0c\u4ed6\u4eec\u5404\u81ea\u4f7f\u7528\u7684 CPU \u8d44\u6e90\u4e92\u4e0d\u5f71\u54cd\u3002<\/p>\n<p>\u5176\u5b9e\uff0c\u8fd9\u4e2a\u65b9\u6848 Redis \u5b98\u65b9\u5df2\u7ecf\u60f3\u5230\u4e86\u3002<\/p>\n<p>Redis \u5728 6.0 \u7248\u672c\u5df2\u7ecf\u63a8\u51fa\u4e86\u8fd9\u4e2a\u529f\u80fd\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u914d\u7f6e\uff0c\u5bf9\u4e3b\u7ebf\u7a0b\u3001\u540e\u53f0\u7ebf\u7a0b\u3001\u540e\u53f0 RDB \u8fdb\u7a0b\u3001AOF rewrite \u8fdb\u7a0b\uff0c\u7ed1\u5b9a\u56fa\u5b9a\u7684 CPU \u903b\u8f91\u6838\u5fc3\uff1a<\/p>\n<pre><code class=\"language-bash\"># Redis Server \u548c IO \u7ebf\u7a0b\u7ed1\u5b9a\u5230 CPU\u6838\u5fc3 0,2,4,6\nserver_cpulist 0-7:2\n\n# \u540e\u53f0\u5b50\u7ebf\u7a0b\u7ed1\u5b9a\u5230 CPU\u6838\u5fc3 1,3\nbio_cpulist 1,3\n\n# \u540e\u53f0 AOF rewrite \u8fdb\u7a0b\u7ed1\u5b9a\u5230 CPU \u6838\u5fc3 8,9,10,11\naof_rewrite_cpulist 8-11\n\n# \u540e\u53f0 RDB \u8fdb\u7a0b\u7ed1\u5b9a\u5230 CPU \u6838\u5fc3 1,10,11\n# bgsave_cpulist 1,10-1<\/code><\/pre>\n<p>\u5982\u679c\u4f60\u4f7f\u7528\u7684\u6b63\u597d\u662f Redis 6.0 \u7248\u672c\uff0c\u5c31\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0a\u914d\u7f6e\uff0c\u6765\u8fdb\u4e00\u6b65\u63d0\u9ad8 Redis \u6027\u80fd\u3002<\/p>\n<p>\u8fd9\u91cc\u6211\u9700\u8981\u63d0\u9192\u4f60\u7684\u662f\uff0c\u4e00\u822c\u6765\u8bf4\uff0cRedis \u7684\u6027\u80fd\u5df2\u7ecf\u8db3\u591f\u4f18\u79c0\uff0c\u9664\u975e\u4f60\u5bf9 Redis \u7684\u6027\u80fd\u6709\u66f4\u52a0\u4e25\u82db\u7684\u8981\u6c42\uff0c\u5426\u5219\u4e0d\u5efa\u8bae\u4f60\u7ed1\u5b9a CPU\u3002<\/p>\n<p>\u4ece\u4e0a\u9762\u7684\u5206\u6790\u4f60\u4e5f\u80fd\u770b\u51fa\uff0c\u7ed1\u5b9a CPU \u9700\u8981\u4f60\u5bf9\u8ba1\u7b97\u673a\u4f53\u7cfb\u7ed3\u6784\u6709\u975e\u5e38\u6e05\u6670\u7684\u4e86\u89e3\uff0c\u5426\u5219\u8c28\u614e\u64cd\u4f5c\u3002<\/p>\n<p>\u6211\u4eec\u7ee7\u7eed\u5206\u6790\u8fd8\u6709\u4ec0\u4e48\u573a\u666f\u4f1a\u5bfc\u81f4 Redis \u53d8\u6162\u3002<\/p>\n<h2>\u4f7f\u7528Swap<\/h2>\n<p>\u5982\u679c\u4f60\u53d1\u73b0 Redis \u7a81\u7136\u53d8\u5f97\u975e\u5e38\u6162\uff0c<strong>\u6bcf\u6b21\u7684\u64cd\u4f5c\u8017\u65f6\u90fd\u8fbe\u5230\u4e86\u51e0\u767e\u6beb\u79d2\u751a\u81f3\u79d2\u7ea7<\/strong>\uff0c\u90a3\u6b64\u65f6\u4f60\u5c31\u9700\u8981\u68c0\u67e5 Redis \u662f\u5426\u4f7f\u7528\u5230\u4e86 Swap\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b Redis \u57fa\u672c\u4e0a\u5df2\u7ecf\u65e0\u6cd5\u63d0\u4f9b\u9ad8\u6027\u80fd\u7684\u670d\u52a1\u4e86\u3002<\/p>\n<p><strong>\u4ec0\u4e48\u662f Swap\uff1f\u4e3a\u4ec0\u4e48\u4f7f\u7528 Swap \u4f1a\u5bfc\u81f4 Redis \u7684\u6027\u80fd\u4e0b\u964d\uff1f<\/strong><\/p>\n<p>\u5982\u679c\u4f60\u5bf9\u64cd\u4f5c\u7cfb\u7edf\u6709\u4e9b\u4e86\u89e3\uff0c\u5c31\u4f1a\u77e5\u9053\u64cd\u4f5c\u7cfb\u7edf\u4e3a\u4e86\u7f13\u89e3\u5185\u5b58\u4e0d\u8db3\u5bf9\u5e94\u7528\u7a0b\u5e8f\u7684\u5f71\u54cd\uff0c\u5141\u8bb8\u628a\u4e00\u90e8\u5206\u5185\u5b58\u4e2d\u7684\u6570\u636e\u6362\u5230\u78c1\u76d8\u4e0a\uff0c\u4ee5\u8fbe\u5230\u5e94\u7528\u7a0b\u5e8f\u5bf9\u5185\u5b58\u4f7f\u7528\u7684\u7f13\u51b2\uff0c\u8fd9\u4e9b\u5185\u5b58\u6570\u636e\u88ab\u6362\u5230\u78c1\u76d8\u4e0a\u7684\u533a\u57df\uff0c\u5c31\u662f Swap\u3002<\/p>\n<p>\u95ee\u9898\u5c31\u5728\u4e8e\uff0c<strong>\u5f53\u5185\u5b58\u4e2d\u7684\u6570\u636e\u88ab\u6362\u5230\u78c1\u76d8\u4e0a\u540e\uff0cRedis \u518d\u8bbf\u95ee\u8fd9\u4e9b\u6570\u636e\u65f6\uff0c\u5c31\u9700\u8981\u4ece\u78c1\u76d8\u4e0a\u8bfb\u53d6\uff0c\u8bbf\u95ee\u78c1\u76d8\u7684\u901f\u5ea6\u8981\u6bd4\u8bbf\u95ee\u5185\u5b58\u6162\u51e0\u767e\u500d\uff01<\/strong><\/p>\n<p>\u5c24\u5176\u662f\u9488\u5bf9 Redis \u8fd9\u79cd\u5bf9\u6027\u80fd\u8981\u6c42\u6781\u9ad8\u3001\u6027\u80fd\u6781\u5176\u654f\u611f\u7684\u6570\u636e\u5e93\u6765\u8bf4\uff0c\u8fd9\u4e2a\u64cd\u4f5c\u5ef6\u65f6\u662f\u65e0\u6cd5\u63a5\u53d7\u7684\u3002<\/p>\n<p>\u6b64\u65f6\uff0c\u4f60\u9700\u8981\u68c0\u67e5 Redis \u673a\u5668\u7684\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff0c\u786e\u8ba4\u662f\u5426\u5b58\u5728\u4f7f\u7528\u4e86 Swap\u3002<\/p>\n<p>\u4f60\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u6765\u67e5\u770b Redis \u8fdb\u7a0b\u662f\u5426\u4f7f\u7528\u5230\u4e86 Swap\uff1a<\/p>\n<pre><code class=\"language-bash\"># \u5148\u627e\u5230 Redis \u7684\u8fdb\u7a0b ID\n$ ps -aux | grep redis-server\n\n# \u67e5\u770b Redis Swap \u4f7f\u7528\u60c5\u51b5\n$ cat \/proc\/$pid\/smaps | egrep &#039;^(Swap|Size)&#039;<\/code><\/pre>\n<p>\u8f93\u51fa\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-bash\">Size:               1256 kB\nSwap:                  0 kB\nSize:                  4 kB\nSwap:                  0 kB\nSize:                132 kB\nSwap:                  0 kB\nSize:              63488 kB\nSwap:                  0 kB\nSize:                132 kB\nSwap:                  0 kB\nSize:              65404 kB\nSwap:                  0 kB\nSize:            1921024 kB\nSwap:                  0 kB\n...<\/code><\/pre>\n<p>\u8fd9\u4e2a\u7ed3\u679c\u4f1a\u5217\u51fa Redis \u8fdb\u7a0b\u7684\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\u3002<\/p>\n<p>\u6bcf\u4e00\u884c Size \u8868\u793a Redis \u6240\u7528\u7684\u4e00\u5757\u5185\u5b58\u5927\u5c0f\uff0cSize \u4e0b\u9762\u7684 Swap \u5c31\u8868\u793a\u8fd9\u5757 Size \u5927\u5c0f\u7684\u5185\u5b58\uff0c\u6709\u591a\u5c11\u6570\u636e\u5df2\u7ecf\u88ab\u6362\u5230\u78c1\u76d8\u4e0a\u4e86\uff0c\u5982\u679c\u8fd9\u4e24\u4e2a\u503c\u76f8\u7b49\uff0c\u8bf4\u660e\u8fd9\u5757\u5185\u5b58\u7684\u6570\u636e\u90fd\u5df2\u7ecf\u5b8c\u5168\u88ab\u6362\u5230\u78c1\u76d8\u4e0a\u4e86\u3002<\/p>\n<p>\u5982\u679c\u53ea\u662f\u5c11\u91cf\u6570\u636e\u88ab\u6362\u5230\u78c1\u76d8\u4e0a\uff0c\u4f8b\u5982\u6bcf\u4e00\u5757 Swap \u5360\u5bf9\u5e94 Size \u7684\u6bd4\u4f8b\u5f88\u5c0f\uff0c\u90a3\u5f71\u54cd\u5e76\u4e0d\u662f\u5f88\u5927\u3002\u5982\u679c\u662f\u51e0\u767e\u5146\u751a\u81f3\u4e0a GB \u7684\u5185\u5b58\u88ab\u6362\u5230\u4e86\u78c1\u76d8\u4e0a\uff0c\u90a3\u4e48\u4f60\u5c31\u9700\u8981\u8b66\u60d5\u4e86\uff0c\u8fd9\u79cd\u60c5\u51b5 Redis \u7684\u6027\u80fd\u80af\u5b9a\u4f1a\u6025\u5267\u4e0b\u964d\u3002<\/p>\n<p>\u6b64\u65f6\u7684\u89e3\u51b3\u65b9\u6848\u662f\uff1a<\/p>\n<ul>\n<li>\u589e\u52a0\u673a\u5668\u7684\u5185\u5b58\uff0c\u8ba9 Redis \u6709\u8db3\u591f\u7684\u5185\u5b58\u53ef\u4ee5\u4f7f\u7528<\/li>\n<li>\u6574\u7406\u5185\u5b58\u7a7a\u95f4\uff0c\u91ca\u653e\u51fa\u8db3\u591f\u7684\u5185\u5b58\u4f9b Redis \u4f7f\u7528\uff0c\u7136\u540e\u91ca\u653e Redis \u7684 Swap\uff0c\u8ba9 Redis \u91cd\u65b0\u4f7f\u7528\u5185\u5b58<\/li>\n<\/ul>\n<p>\u91ca\u653e Redis \u7684 Swap \u8fc7\u7a0b\u901a\u5e38\u8981\u91cd\u542f\u5b9e\u4f8b\uff0c\u4e3a\u4e86\u907f\u514d\u91cd\u542f\u5b9e\u4f8b\u5bf9\u4e1a\u52a1\u7684\u5f71\u54cd\uff0c\u4e00\u822c\u4f1a\u5148\u8fdb\u884c\u4e3b\u4ece\u5207\u6362\uff0c\u7136\u540e\u91ca\u653e\u65e7\u4e3b\u8282\u70b9\u7684 Swap\uff0c\u91cd\u542f\u65e7\u4e3b\u8282\u70b9\u5b9e\u4f8b\uff0c\u5f85\u4ece\u5e93\u6570\u636e\u540c\u6b65\u5b8c\u6210\u540e\uff0c\u518d\u8fdb\u884c\u4e3b\u4ece\u5207\u6362\u5373\u53ef\u3002<\/p>\n<p>\u53ef\u89c1\uff0c\u5f53 Redis \u4f7f\u7528\u5230 Swap \u540e\uff0c\u6b64\u65f6\u7684 Redis \u6027\u80fd\u57fa\u672c\u5df2\u8fbe\u4e0d\u5230\u9ad8\u6027\u80fd\u7684\u8981\u6c42\uff08\u4f60\u53ef\u4ee5\u7406\u89e3\u4e3a\u6b66\u529f\u88ab\u5e9f\uff09\uff0c\u6240\u4ee5\u4f60\u4e5f\u9700\u8981\u63d0\u524d\u9884\u9632\u8fd9\u79cd\u60c5\u51b5\u3002<\/p>\n<p>\u9884\u9632\u7684\u529e\u6cd5\u5c31\u662f\uff0c\u4f60\u9700\u8981\u5bf9 Redis \u673a\u5668\u7684\u5185\u5b58\u548c Swap \u4f7f\u7528\u60c5\u51b5\u8fdb\u884c\u76d1\u63a7\uff0c\u5728\u5185\u5b58\u4e0d\u8db3\u6216\u4f7f\u7528\u5230 Swap \u65f6\u62a5\u8b66\u51fa\u6765\uff0c\u53ca\u65f6\u5904\u7406\u3002<\/p>\n<h2>\u788e\u7247\u6574\u7406<\/h2>\n<p>Redis \u7684\u6570\u636e\u90fd\u5b58\u50a8\u5728\u5185\u5b58\u4e2d\uff0c\u5f53\u6211\u4eec\u7684\u5e94\u7528\u7a0b\u5e8f\u9891\u7e41\u4fee\u6539 Redis \u4e2d\u7684\u6570\u636e\u65f6\uff0c\u5c31\u6709\u53ef\u80fd\u4f1a\u5bfc\u81f4 Redis \u4ea7\u751f\u5185\u5b58\u788e\u7247\u3002<\/p>\n<p>\u5185\u5b58\u788e\u7247\u4f1a\u964d\u4f4e Redis \u7684\u5185\u5b58\u4f7f\u7528\u7387\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u6267\u884c INFO \u547d\u4ee4\uff0c\u5f97\u5230\u8fd9\u4e2a\u5b9e\u4f8b\u7684\u5185\u5b58\u788e\u7247\u7387\uff1a<\/p>\n<pre><code class=\"language-bash\"># Memory\nused_memory:5709194824\nused_memory_human:5.32G\nused_memory_rss:8264855552\nused_memory_rss_human:7.70G\n...\nmem_fragmentation_ratio:1.45<\/code><\/pre>\n<p>\u8fd9\u4e2a\u5185\u5b58\u788e\u7247\u7387\u662f\u600e\u4e48\u8ba1\u7b97\u7684\uff1f<\/p>\n<p>\u5f88\u7b80\u5355\uff0c<code>mem_fragmentation_ratio = used_memory_rss \/ used_memory<\/code>\u3002<\/p>\n<p>\u5176\u4e2d<code>used_memory<\/code>\u8868\u793a Redis \u5b58\u50a8\u6570\u636e\u7684\u5185\u5b58\u5927\u5c0f\uff0c\u800c<code>used_memory_rss<\/code>\u8868\u793a\u64cd\u4f5c\u7cfb\u7edf\u5b9e\u9645\u5206\u914d\u7ed9 Redis \u8fdb\u7a0b\u7684\u5927\u5c0f\u3002<\/p>\n<p>\u5982\u679c<code>mem_fragmentation_ratio &gt; 1.5<\/code>\uff0c\u8bf4\u660e\u5185\u5b58\u788e\u7247\u7387\u5df2\u7ecf\u8d85\u8fc7\u4e86 50%\uff0c\u8fd9\u65f6\u6211\u4eec\u5c31\u9700\u8981\u91c7\u53d6\u4e00\u4e9b\u63aa\u65bd\u6765\u964d\u4f4e\u5185\u5b58\u788e\u7247\u4e86\u3002<\/p>\n<p>\u89e3\u51b3\u7684\u65b9\u6848\u4e00\u822c\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u5982\u679c\u4f60\u4f7f\u7528\u7684\u662f Redis 4.0 \u4ee5\u4e0b\u7248\u672c\uff0c\u53ea\u80fd\u901a\u8fc7\u91cd\u542f\u5b9e\u4f8b\u6765\u89e3\u51b3<\/li>\n<li>\u5982\u679c\u4f60\u4f7f\u7528\u7684\u662f Redis 4.0 \u7248\u672c\uff0c\u5b83\u6b63\u597d\u63d0\u4f9b\u4e86\u81ea\u52a8\u788e\u7247\u6574\u7406\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u901a\u8fc7\u914d\u7f6e\u5f00\u542f\u788e\u7247\u81ea\u52a8\u6574\u7406<\/li>\n<\/ul>\n<p>\u4f46\u662f\uff0c<strong>\u5f00\u542f\u5185\u5b58\u788e\u7247\u6574\u7406\uff0c\u5b83\u4e5f\u6709\u53ef\u80fd\u4f1a\u5bfc\u81f4 Redis \u6027\u80fd\u4e0b\u964d<\/strong>\u3002<\/p>\n<p>\u539f\u56e0\u5728\u4e8e\uff0cRedis \u7684\u788e\u7247\u6574\u7406\u5de5\u4f5c\u662f\u4e5f\u5728\u4e3b\u7ebf\u7a0b\u4e2d\u6267\u884c\u7684\uff0c\u5f53\u5176\u8fdb\u884c\u788e\u7247\u6574\u7406\u65f6\uff0c\u5fc5\u7136\u4f1a\u6d88\u8017 CPU \u8d44\u6e90\uff0c\u4ea7\u751f\u66f4\u591a\u7684\u8017\u65f6\uff0c\u4ece\u800c\u5f71\u54cd\u5230\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u5f53\u4f60\u9700\u8981\u5f00\u542f\u8fd9\u4e2a\u529f\u80fd\u65f6\uff0c\u6700\u597d\u63d0\u524d\u6d4b\u8bd5\u8bc4\u4f30\u5b83\u5bf9 Redis \u7684\u5f71\u54cd\u3002<\/p>\n<p>Redis \u788e\u7247\u6574\u7406\u7684\u53c2\u6570\u914d\u7f6e\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-bash\"># \u5f00\u542f\u81ea\u52a8\u5185\u5b58\u788e\u7247\u6574\u7406\uff08\u603b\u5f00\u5173\uff09\nactivedefrag yes\n\n# \u5185\u5b58\u4f7f\u7528 100MB \u4ee5\u4e0b\uff0c\u4e0d\u8fdb\u884c\u788e\u7247\u6574\u7406\nactive-defrag-ignore-bytes 100mb\n\n# \u5185\u5b58\u788e\u7247\u7387\u8d85\u8fc7 10%\uff0c\u5f00\u59cb\u788e\u7247\u6574\u7406\nactive-defrag-threshold-lower 10\n# \u5185\u5b58\u788e\u7247\u7387\u8d85\u8fc7 100%\uff0c\u5c3d\u6700\u5927\u52aa\u529b\u788e\u7247\u6574\u7406\nactive-defrag-threshold-upper 100\n\n# \u5185\u5b58\u788e\u7247\u6574\u7406\u5360\u7528 CPU \u8d44\u6e90\u6700\u5c0f\u767e\u5206\u6bd4\nactive-defrag-cycle-min 1\n# \u5185\u5b58\u788e\u7247\u6574\u7406\u5360\u7528 CPU \u8d44\u6e90\u6700\u5927\u767e\u5206\u6bd4\nactive-defrag-cycle-max 25\n\n# \u788e\u7247\u6574\u7406\u671f\u95f4\uff0c\u5bf9\u4e8e List\/Set\/Hash\/ZSet \u7c7b\u578b\u5143\u7d20\u4e00\u6b21 Scan \u7684\u6570\u91cf\nactive-defrag-max-scan-fields 1000<\/code><\/pre>\n<p>\u4f60\u9700\u8981\u7ed3\u5408 Redis \u673a\u5668\u7684\u8d1f\u8f7d\u60c5\u51b5\uff0c\u4ee5\u53ca\u5e94\u7528\u7a0b\u5e8f\u53ef\u63a5\u53d7\u7684\u5ef6\u8fdf\u8303\u56f4\u8fdb\u884c\u8bc4\u4f30\uff0c\u5408\u7406\u8c03\u6574\u788e\u7247\u6574\u7406\u7684\u53c2\u6570\uff0c\u5c3d\u53ef\u80fd\u964d\u4f4e\u788e\u7247\u6574\u7406\u671f\u95f4\u5bf9 Redis \u7684\u5f71\u54cd\u3002<\/p>\n<h2>\u7f51\u7edc\u5e26\u5bbd\u8fc7\u8f7d<\/h2>\n<p>\u5982\u679c\u4ee5\u4e0a\u4ea7\u751f\u6027\u80fd\u95ee\u9898\u7684\u573a\u666f\uff0c\u4f60\u90fd\u89c4\u907f\u6389\u4e86\uff0c\u800c\u4e14 Redis \u4e5f\u7a33\u5b9a\u8fd0\u884c\u4e86\u5f88\u957f\u65f6\u95f4\uff0c\u4f46\u5728\u67d0\u4e2a\u65f6\u95f4\u70b9\u4e4b\u540e\u5f00\u59cb\uff0c\u64cd\u4f5c Redis \u7a81\u7136\u5f00\u59cb\u53d8\u6162\u4e86\uff0c\u800c\u4e14\u4e00\u76f4\u6301\u7eed\u4e0b\u53bb\uff0c\u8fd9\u79cd\u60c5\u51b5\u53c8\u662f\u4ec0\u4e48\u539f\u56e0\u5bfc\u81f4\uff1f<\/p>\n<p>\u6b64\u65f6\u4f60\u9700\u8981\u6392\u67e5\u4e00\u4e0b Redis \u673a\u5668\u7684\u7f51\u7edc\u5e26\u5bbd\u662f\u5426\u8fc7\u8f7d\uff0c\u662f\u5426\u5b58\u5728\u67d0\u4e2a\u5b9e\u4f8b\u628a\u6574\u4e2a\u673a\u5668\u7684\u7f51\u8def\u5e26\u5bbd\u5360\u6ee1\u7684\u60c5\u51b5\u3002<\/p>\n<p>\u7f51\u7edc\u5e26\u5bbd\u8fc7\u8f7d\u7684\u60c5\u51b5\u4e0b\uff0c\u670d\u52a1\u5668\u5728 TCP \u5c42\u548c\u7f51\u7edc\u5c42\u5c31\u4f1a\u51fa\u73b0\u6570\u636e\u5305\u53d1\u9001\u5ef6\u8fdf\u3001\u4e22\u5305\u7b49\u60c5\u51b5\u3002<\/p>\n<p>Redis \u7684\u9ad8\u6027\u80fd\uff0c\u9664\u4e86\u64cd\u4f5c\u5185\u5b58\u4e4b\u5916\uff0c\u5c31\u5728\u4e8e\u7f51\u7edc IO \u4e86\uff0c\u5982\u679c\u7f51\u7edc IO \u5b58\u5728\u74f6\u9888\uff0c\u90a3\u4e48\u4e5f\u4f1a\u4e25\u91cd\u5f71\u54cd Redis \u7684\u6027\u80fd\u3002<\/p>\n<p>\u5982\u679c\u786e\u5b9e\u51fa\u73b0\u8fd9\u79cd\u60c5\u51b5\uff0c\u4f60\u9700\u8981\u53ca\u65f6\u786e\u8ba4\u5360\u6ee1\u7f51\u7edc\u5e26\u5bbd Redis \u5b9e\u4f8b\uff0c\u5982\u679c\u5c5e\u4e8e\u6b63\u5e38\u7684\u4e1a\u52a1\u8bbf\u95ee\uff0c\u90a3\u5c31\u9700\u8981\u53ca\u65f6\u6269\u5bb9\u6216\u8fc1\u79fb\u5b9e\u4f8b\u4e86\uff0c\u907f\u514d\u56e0\u4e3a\u8fd9\u4e2a\u5b9e\u4f8b\u6d41\u91cf\u8fc7\u5927\uff0c\u5f71\u54cd\u8fd9\u4e2a\u673a\u5668\u7684\u5176\u4ed6\u5b9e\u4f8b\u3002<\/p>\n<p>\u8fd0\u7ef4\u5c42\u9762\uff0c\u4f60\u9700\u8981\u5bf9 Redis \u673a\u5668\u7684\u5404\u9879\u6307\u6807\u589e\u52a0\u76d1\u63a7\uff0c\u5305\u62ec\u7f51\u7edc\u6d41\u91cf\uff0c\u5728\u7f51\u7edc\u6d41\u91cf\u8fbe\u5230\u4e00\u5b9a\u9608\u503c\u65f6\u63d0\u524d\u62a5\u8b66\uff0c\u53ca\u65f6\u786e\u8ba4\u548c\u6269\u5bb9\u3002<\/p>\n<h2>\u5176\u4ed6\u539f\u56e0<\/h2>\n<p>\u597d\u4e86\uff0c\u4ee5\u4e0a\u8fd9\u4e9b\u65b9\u9762\u5c31\u662f\u5982\u4f55\u6392\u67e5 Redis \u5ef6\u8fdf\u95ee\u9898\u7684\u601d\u8def\u548c\u8def\u5f84\u3002<\/p>\n<p>\u9664\u4e86\u4ee5\u4e0a\u8fd9\u4e9b\uff0c\u8fd8\u6709\u4e00\u4e9b\u6bd4\u8f83\u5c0f\u7684\u70b9\uff0c\u4f60\u4e5f\u9700\u8981\u6ce8\u610f\u4e00\u4e0b\uff1a<\/p>\n<p><strong>1) \u9891\u7e41\u77ed\u8fde\u63a5<\/strong><\/p>\n<p>\u4f60\u7684\u4e1a\u52a1\u5e94\u7528\uff0c\u5e94\u8be5\u4f7f\u7528\u957f\u8fde\u63a5\u64cd\u4f5c Redis\uff0c\u907f\u514d\u9891\u7e41\u7684\u77ed\u8fde\u63a5\u3002<\/p>\n<p>\u9891\u7e41\u7684\u77ed\u8fde\u63a5\u4f1a\u5bfc\u81f4 Redis \u5927\u91cf\u65f6\u95f4\u8017\u8d39\u5728\u8fde\u63a5\u7684\u5efa\u7acb\u548c\u91ca\u653e\u4e0a\uff0cTCP \u7684\u4e09\u6b21\u63e1\u624b\u548c\u56db\u6b21\u6325\u624b\u540c\u6837\u4e5f\u4f1a\u589e\u52a0\u8bbf\u95ee\u5ef6\u8fdf\u3002<\/p>\n<p><strong>2) \u8fd0\u7ef4\u76d1\u63a7<\/strong><\/p>\n<p>\u524d\u9762\u6211\u4e5f\u63d0\u5230\u4e86\uff0c\u8981\u60f3\u63d0\u524d\u9884\u77e5 Redis \u53d8\u6162\u7684\u60c5\u51b5\u53d1\u751f\uff0c\u5fc5\u4e0d\u53ef\u5c11\u7684\u5c31\u662f\u505a\u597d\u5b8c\u5584\u7684\u76d1\u63a7\u3002<\/p>\n<p>\u76d1\u63a7\u5176\u5b9e\u5c31\u662f\u5bf9\u91c7\u96c6 Redis \u7684\u5404\u9879\u8fd0\u884c\u65f6\u6307\u6807\uff0c\u901a\u5e38\u7684\u505a\u6cd5\u662f\u76d1\u63a7\u7a0b\u5e8f\u5b9a\u65f6\u91c7\u96c6 Redis \u7684 INFO \u4fe1\u606f\uff0c\u7136\u540e\u6839\u636e INFO \u4fe1\u606f\u4e2d\u7684\u72b6\u6001\u6570\u636e\u505a\u6570\u636e\u5c55\u793a\u548c\u62a5\u8b66\u3002<\/p>\n<p>\u8fd9\u91cc\u6211\u9700\u8981\u63d0\u9192\u4f60\u7684\u662f\uff0c\u5728\u5199\u4e00\u4e9b\u76d1\u63a7\u811a\u672c\uff0c\u6216\u4f7f\u7528\u5f00\u6e90\u7684\u76d1\u63a7\u7ec4\u4ef6\u65f6\uff0c\u4e5f\u4e0d\u80fd\u6389\u4ee5\u8f7b\u5fc3\u3002<\/p>\n<p>\u5728\u5199\u76d1\u63a7\u811a\u672c\u8bbf\u95ee Redis \u65f6\uff0c\u5c3d\u91cf\u91c7\u7528\u957f\u8fde\u63a5\u7684\u65b9\u5f0f\u91c7\u96c6\u72b6\u6001\u4fe1\u606f\uff0c\u907f\u514d\u9891\u7e41\u77ed\u8fde\u63a5\u3002\u540c\u65f6\uff0c\u4f60\u8fd8\u8981\u6ce8\u610f\u63a7\u5236\u8bbf\u95ee Redis \u7684\u9891\u7387\uff0c\u907f\u514d\u5f71\u54cd\u5230\u4e1a\u52a1\u8bf7\u6c42\u3002<\/p>\n<p>\u5728\u4f7f\u7528\u4e00\u4e9b\u5f00\u6e90\u7684\u76d1\u63a7\u7ec4\u4ef6\u65f6\uff0c\u6700\u597d\u4e86\u89e3\u4e00\u4e0b\u8fd9\u4e9b\u7ec4\u4ef6\u7684\u5b9e\u73b0\u539f\u7406\uff0c\u4ee5\u53ca\u6b63\u786e\u914d\u7f6e\u8fd9\u4e9b\u7ec4\u4ef6\uff0c\u9632\u6b62\u51fa\u73b0\u76d1\u63a7\u7ec4\u4ef6\u53d1\u751f Bug\uff0c\u5bfc\u81f4\u77ed\u65f6\u5927\u91cf\u64cd\u4f5c Redis\uff0c\u5f71\u54cd Redis \u6027\u80fd\u7684\u60c5\u51b5\u53d1\u751f\u3002<\/p>\n<p>\u6211\u4eec\u5f53\u65f6\u5c31\u53d1\u751f\u8fc7\uff0cDBA \u5728\u4f7f\u7528\u4e00\u4e9b\u5f00\u6e90\u7ec4\u4ef6\u65f6\uff0c\u56e0\u4e3a\u914d\u7f6e\u548c\u4f7f\u7528\u95ee\u9898\uff0c\u5bfc\u81f4\u76d1\u63a7\u7a0b\u5e8f\u9891\u7e41\u5730\u4e0e Redis \u5efa\u7acb\u548c\u65ad\u5f00\u8fde\u63a5\uff0c\u5bfc\u81f4 Redis \u54cd\u5e94\u53d8\u6162\u3002<\/p>\n<p><strong>3) \u5176\u5b83\u7a0b\u5e8f\u4e89\u62a2\u8d44\u6e90<\/strong><\/p>\n<p>\u6700\u540e\u9700\u8981\u63d0\u9192\u4f60\u7684\u662f\uff0c\u4f60\u7684 Redis \u673a\u5668\u6700\u597d\u4e13\u9879\u4e13\u7528\uff0c\u53ea\u7528\u6765\u90e8\u7f72 Redis \u5b9e\u4f8b\uff0c\u4e0d\u8981\u90e8\u7f72\u5176\u4ed6\u5e94\u7528\u7a0b\u5e8f\uff0c\u5c3d\u91cf\u7ed9 Redis \u63d0\u4f9b\u4e00\u4e2a\u76f8\u5bf9\u300c\u5b89\u9759\u300d\u7684\u73af\u5883\uff0c\u907f\u514d\u5176\u5b83\u7a0b\u5e8f\u5360\u7528 CPU\u3001\u5185\u5b58\u3001\u78c1\u76d8\u8d44\u6e90\uff0c\u5bfc\u81f4\u5206\u914d\u7ed9 Redis \u7684\u8d44\u6e90\u4e0d\u8db3\u800c\u53d7\u5230\u5f71\u54cd\u3002<\/p>\n<h2>\u603b\u7ed3<\/h2>\n<p>\u597d\u4e86\uff0c\u4ee5\u4e0a\u5c31\u662f\u6211\u603b\u7ed3\u7684\u5728\u4f7f\u7528 Redis \u8fc7\u7a0b\u4e2d\uff0c\u5e38\u89c1\u7684\u53ef\u80fd\u5bfc\u81f4\u5ef6\u8fdf\u3001\u751a\u81f3\u963b\u585e\u7684\u95ee\u9898\u573a\u666f\uff0c\u4ee5\u53ca\u5982\u4f55\u5feb\u901f\u5b9a\u4f4d\u548c\u5206\u6790\u8fd9\u4e9b\u95ee\u9898\uff0c\u5e76\u4e14\u9488\u5bf9\u6027\u5730\u63d0\u4f9b\u4e86\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n<p>\u8fd9\u91cc\u6211\u4e5f\u6c47\u603b\u6210\u4e86\u601d\u7ef4\u5bfc\u56fe\uff0c\u65b9\u4fbf\u4f60\u5728\u6392\u67e5 Redis \u6027\u80fd\u95ee\u9898\u65f6\uff0c\u5feb\u901f\u5730\u53bb\u5206\u6790\u548c\u5b9a\u4f4d\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.yezhou.me\/AppBlog\/images\/\u8fd0\u7ef4\/\u6392\u67e5Redis\u6027\u80fd\u95ee\u9898-\u603b\u7ed3.png\" alt=\"\u6392\u67e5Redis\u6027\u80fd\u95ee\u9898-\u603b\u7ed3\" \/><\/p>\n<p>\u8fd9\u91cc\u518d\u7b80\u5355\u603b\u7ed3\u4e00\u4e0b\uff0cRedis \u7684\u6027\u80fd\u95ee\u9898\uff0c\u65e2\u6d89\u53ca\u5230\u4e86\u4e1a\u52a1\u5f00\u53d1\u4eba\u5458\u7684\u4f7f\u7528\u65b9\u9762\uff0c\u4e5f\u6d89\u53ca\u5230\u4e86 DBA \u7684\u8fd0\u7ef4\u65b9\u9762\u3002<\/p>\n<p>\u4f5c\u4e3a\u4e1a\u52a1\u5f00\u53d1\u4eba\u5458\uff0c\u6211\u4eec\u9700\u8981\u4e86\u89e3 Redis \u7684\u57fa\u672c\u539f\u7406\uff0c\u4f8b\u5982\u5404\u4e2a\u547d\u4ee4\u6267\u884c\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u3001\u6570\u636e\u8fc7\u671f\u7b56\u7565\u3001\u6570\u636e\u6dd8\u6c70\u7b56\u7565\u7b49\uff0c\u4ece\u800c\u66f4\u5408\u7406\u5730\u4f7f\u7528 Redis \u547d\u4ee4\uff0c\u5e76\u4e14\u7ed3\u5408\u4e1a\u52a1\u573a\u666f\u8fdb\u884c\u4f18\u5316\u3002<\/p>\n<p>\u4f5c\u4e3a DBA \u548c\u8fd0\u7ef4\u4eba\u5458\uff0c\u9700\u8981\u4e86\u89e3 Redis \u8fd0\u884c\u673a\u5236\uff0c\u4f8b\u5982\u6570\u636e\u6301\u4e45\u5316\u3001\u5185\u5b58\u788e\u7247\u6574\u7406\u3001\u8fdb\u7a0b\u7ed1\u6838\u914d\u7f6e\u3002\u9664\u6b64\u4e4b\u5916\uff0c\u8fd8\u9700\u8981\u4e86\u89e3\u64cd\u4f5c\u7cfb\u7edf\u76f8\u5173\u77e5\u8bc6\uff0c\u4f8b\u5982\u5199\u65f6\u590d\u5236\u3001\u5185\u5b58\u5927\u9875\u3001Swap \u673a\u5236\u7b49\u7b49\u3002<\/p>\n<p>\u540c\u65f6\uff0cDBA \u5728\u90e8\u7f72 Redis \u65f6\uff0c\u9700\u8981\u63d0\u524d\u5bf9\u8fdb\u884c\u5bb9\u91cf\u89c4\u5212\uff0c\u9884\u7559\u8db3\u591f\u7684\u673a\u5668\u8d44\u6e90\uff0c\u8fd8\u8981\u5bf9 Redis \u673a\u5668\u548c\u5b9e\u4f8b\u505a\u597d\u5b8c\u5584\u7684\u76d1\u63a7\uff0c\u8fd9\u6837\u624d\u80fd\u5c3d\u53ef\u80fd\u5730\u4fdd\u8bc1 Redis \u7684\u7a33\u5b9a\u8fd0\u884c\u3002<\/p>\n<h2>\u540e\u8bb0<\/h2>\n<p>\u5982\u679c\u4f60\u80fd\u8010\u5fc3\u5730\u770b\u5230\u8fd9\u91cc\uff0c\u60f3\u5fc5\u4f60\u80af\u5b9a\u5df2\u7ecf\u5bf9 Redis \u7684\u6027\u80fd\u8c03\u4f18\u6709\u4e86\u5f88\u5927\u7684\u6536\u83b7\u3002<\/p>\n<p>\u4f60\u5e94\u8be5\u4e5f\u53d1\u73b0\u4e86\uff0cRedis \u7684\u6027\u80fd\u95ee\u9898\uff0c\u6d89\u53ca\u5230\u7684\u77e5\u8bc6\u70b9\u975e\u5e38\u5e7f\uff0c\u51e0\u4e4e\u6db5\u76d6\u4e86 CPU\u3001\u5185\u5b58\u3001\u7f51\u7edc\u3001\u751a\u81f3\u78c1\u76d8\u7684\u65b9\u65b9\u9762\u9762\uff0c\u540c\u65f6\uff0c\u4f60\u8fd8\u9700\u8981\u4e86\u89e3\u8ba1\u7b97\u673a\u7684\u4f53\u7cfb\u7ed3\u6784\uff0c\u4ee5\u53ca\u64cd\u4f5c\u7cfb\u7edf\u7684\u5404\u79cd\u673a\u5236\u3002<\/p>\n<p>\u4ece\u8d44\u6e90\u4f7f\u7528\u89d2\u5ea6\u6765\u770b\uff0c\u5305\u542b\u7684\u77e5\u8bc6\u70b9\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>CPU \u76f8\u5173\uff1a\u4f7f\u7528\u590d\u6742\u5ea6\u8fc7\u9ad8\u547d\u4ee4\u3001\u6570\u636e\u7684\u6301\u4e45\u5316\uff0c\u90fd\u4e0e\u8017\u8d39\u8fc7\u591a\u7684 CPU \u8d44\u6e90\u6709\u5173<\/li>\n<li>\u5185\u5b58\u76f8\u5173\uff1abigkey \u5185\u5b58\u7684\u7533\u8bf7\u548c\u91ca\u653e\u3001\u6570\u636e\u8fc7\u671f\u3001\u6570\u636e\u6dd8\u6c70\u3001\u788e\u7247\u6574\u7406\u3001\u5185\u5b58\u5927\u9875\u3001\u5185\u5b58\u5199\u65f6\u590d\u5236\u90fd\u4e0e\u5185\u5b58\u606f\u606f\u76f8\u5173<\/li>\n<li>\u78c1\u76d8\u76f8\u5173\uff1a\u6570\u636e\u6301\u4e45\u5316\u3001AOF \u5237\u76d8\u7b56\u7565\uff0c\u4e5f\u4f1a\u53d7\u5230\u78c1\u76d8\u7684\u5f71\u54cd<\/li>\n<li>\u7f51\u7edc\u76f8\u5173\uff1a\u77ed\u8fde\u63a5\u3001\u5b9e\u4f8b\u6d41\u91cf\u8fc7\u8f7d\u3001\u7f51\u7edc\u6d41\u91cf\u8fc7\u8f7d\uff0c\u4e5f\u4f1a\u964d\u4f4e Redis \u6027\u80fd<\/li>\n<li>\u8ba1\u7b97\u673a\u7cfb\u7edf\uff1aCPU \u7ed3\u6784\u3001\u5185\u5b58\u5206\u914d\uff0c\u90fd\u5c5e\u4e8e\u6700\u57fa\u7840\u7684\u8ba1\u7b97\u673a\u7cfb\u7edf\u77e5\u8bc6<\/li>\n<li>\u64cd\u4f5c\u7cfb\u7edf\uff1a\u5199\u65f6\u590d\u5236\u3001\u5185\u5b58\u5927\u9875\u3001Swap\u3001CPU \u7ed1\u5b9a\uff0c\u90fd\u5c5e\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u5c42\u9762\u7684\u77e5\u8bc6<\/li>\n<\/ul>\n<p>\u6ca1\u60f3\u5230\u5427\uff1fRedis \u4e3a\u4e86\u628a\u6027\u80fd\u505a\u5230\u6781\u81f4\uff0c\u6d89\u53ca\u5230\u4e86\u8fd9\u4e48\u591a\u9879\u4f18\u5316\u3002<\/p>\n<p>\u5982\u679c\u8fd9\u7bc7\u6587\u7ae0\u5185\u5bb9\uff0c\u4f60\u80fd\u5438\u6536 90% \u4ee5\u4e0a\uff0c\u8bf4\u660e\u4f60\u5bf9 Redis \u539f\u7406\u3001\u8ba1\u7b97\u673a\u57fa\u7840\u3001\u64cd\u4f5c\u7cfb\u7edf\u90fd\u5df2\u7ecf\u6709\u4e86\u8f83\u4e3a\u6df1\u523b\u7684\u7406\u89e3\u3002<\/p>\n<p>\u5982\u679c\u4f60\u80fd\u5438\u6536 50% \u5de6\u53f3\uff0c\u90a3\u4f60\u53ef\u4ee5\u597d\u597d\u68b3\u7406\u4e00\u4e0b\uff0c\u54ea\u4e9b\u65b9\u9762\u662f\u81ea\u5df1\u7684\u77e5\u8bc6\u76f2\u533a\uff0c\u8fd9\u6837\u53ef\u4ee5\u9488\u5bf9\u6027\u5730\u53bb\u5b66\u4e60\u3002<\/p>\n<p>\u5982\u679c\u4f60\u5438\u6536\u7684\u53ea\u5728 30% \u4ee5\u4e0b\uff0c\u90a3\u4e48\u4f60\u53ef\u4ee5\u5148\u4ece Redis \u7684\u57fa\u672c\u539f\u7406\u51fa\u53d1\uff0c\u5148\u4e86\u89e3 Redis \u7684\u5404\u79cd\u673a\u5236\uff0c\u8fdb\u800c\u601d\u8003 Redis \u4e3a\u4e86\u63d0\u9ad8\u6027\u80fd\uff0c\u4e3a\u4ec0\u4e48\u4f7f\u7528\u8fd9\u4e9b\u673a\u5236\uff1f\u8fd9\u4e9b\u673a\u5236\u53c8\u662f\u5229\u7528\u4e86\u8ba1\u7b97\u673a\u548c\u64cd\u4f5c\u7cfb\u7edf\u7684\u54ea\u4e9b\u7279\u6027\u53bb\u505a\u7684\uff1f\u8fdb\u800c\u4e00\u6b65\u6b65\u5730\u53bb\u6269\u5145\u4f60\u7684\u77e5\u8bc6\u4f53\u7cfb\uff0c\u8fd9\u662f\u4e00\u4e2a\u975e\u5e38\u9ad8\u6548\u7684\u5b66\u4e60\u8def\u5f84\u3002<\/p>\n<p>\u7531\u4e8e\u7bc7\u5e45\u9650\u5236\uff0c\u5173\u4e8e Redis \u7684\u5f88\u591a\u7ec6\u8282\u65e0\u6cd5\u5168\u90e8\u5c55\u5f00\uff0c\u5176\u5b9e\uff0c\u8fd9\u7bc7\u6587\u7ae0\u63d0\u5230\u7684\u6bcf\u4e00\u4e2a\u5bfc\u81f4 Redis \u6027\u80fd\u95ee\u9898\u7684\u573a\u666f\uff0c\u5982\u679c\u5c55\u5f00\u6765\u8bb2\uff0c\u90fd\u53ef\u4ee5\u5199\u51fa\u4e00\u7bc7\u6587\u7ae0\u51fa\u6765\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5173\u4e8e Redis \u8fdb\u7a0b\u7ed1\u5b9a CPU\uff0c\u4ee5\u53ca\u64cd\u4f5c\u7cfb\u7edf\u4f7f\u7528 Swap\uff0c\u5176\u5b9e\u8fd9\u4e9b\u8fd8\u6d89\u53ca\u5230\u4e86\u975e\u4e00\u81f4\u6027\u5185\u5b58\u8bbf\u95ee NUMA \u67b6\u6784\u7684\u5f71\u54cd\uff0c\u5176\u4e2d\u4e5f\u6709\u5f88\u591a\u7ec6\u8282\u6ca1\u6709\u5c55\u5f00\u6765\u8bb2\u3002<\/p>\n<blockquote>\n<p>\u8f6c\u8f7d\u81f3\uff1a<a target=\"_blank\" rel=\"noopener\" href=\"https:\/\/zxiaofan.blog.csdn.net\/article\/details\/113417890\">https:\/\/zxiaofan.blog.csdn.net\/article\/details\/113417890<\/a><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>Redis \u4f5c\u4e3a\u4f18\u79c0\u7684\u5185\u5b58\u6570\u636e\u5e93\uff0c\u5176\u62e5\u6709\u975e\u5e38\u9ad8\u7684\u6027\u80fd\uff0c\u5355\u4e2a\u5b9e\u4f8b\u7684 OPS \u80fd\u591f\u8fbe\u5230 10W \u5de6\u53f3\u3002\u4f46\u4e5f\u6b63\u56e0\u6b64\u5982 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-1993","post","type-post","status-publish","format-standard","hentry","category-redis"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1993","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1993"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1993\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1993"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}