{"id":201559,"date":"2025-05-10T08:39:18","date_gmt":"2025-05-10T00:39:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201559\/"},"modified":"2025-05-10T08:39:18","modified_gmt":"2025-05-10T00:39:18","slug":"redis%e5%87%a0%e4%b8%aa%e9%87%8d%e8%a6%81%e7%9a%84%e5%81%a5%e5%ba%b7%e6%8c%87%e6%a0%87","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201559\/","title":{"rendered":"Redis\u51e0\u4e2a\u91cd\u8981\u7684\u5065\u5eb7\u6307\u6807"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>Redis\u51e0\u4e2a\u91cd\u8981\u7684\u5065\u5eb7\u6307\u6807<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u600e\u4e48\u5165\u95e8\u6570\u636e\u5e93\u7f16\u7a0b\uff1f\u9700\u8981\u5b66\u4e60\u54ea\u4e9b\u77e5\u8bc6\u70b9\uff1f\u8fd9\u662f\u65b0\u624b\u4eec\u521a\u63a5\u89e6\u7f16\u7a0b\u65f6\u5e38\u89c1\u7684\u95ee\u9898\uff1b\u4e0b\u9762golang\u5b66\u4e60\u7f51\u5c31\u6765\u7ed9\u5927\u5bb6\u6574\u7406\u5206\u4eab\u4e00\u4e9b\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u591f\u7ed9\u521d\u5b66\u8005\u4e00\u4e9b\u5e2e\u52a9\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u4ecb\u7ecd\u300aRedis\u51e0\u4e2a\u91cd\u8981\u7684\u5065\u5eb7\u6307\u6807\u300b\uff0c\u6d89\u53ca\u5230\u547d\u4ee4\u3001\u5185\u5b58\u3001Redis\u3001\u5ba2\u6237\u7aef\uff0c\u6709\u9700\u8981\u7684\u53ef\u4ee5\u6536\u85cf\u4e00\u4e0b<\/p>\n<p><strong>\u5b58\u6d3b\u60c5\u51b5<\/strong><\/p>\n<p>\u6240\u6709\u6307\u6807\u4e2d\u6700\u91cd\u8981\u7684\u5f53\u7136\u662f\u68c0\u67e5redis\u662f\u5426\u8fd8\u6d3b\u7740\uff0c\u53ef\u4ee5\u901a\u8fc7\u547d\u4ee4PING\u7684\u54cd\u5e94\u662f\u5426\u662fPONG\u6765\u5224\u65ad\u3002<\/p>\n<p><strong>\u8fde\u63a5\u6570<\/strong><\/p>\n<p>\u8fde\u63a5\u7684\u5ba2\u6237\u7aef\u6570\u91cf\uff0c\u53ef\u901a\u8fc7\u547d\u4ee4src\/redis-cli info Clients | grep connected_clients\u5f97\u5230\uff0c\u8fd9\u4e2a\u503c\u8ddf\u4f7f\u7528redis\u7684\u670d\u52a1\u7684\u8fde\u63a5\u6c60\u914d\u7f6e\u5173\u7cfb\u6bd4\u8f83\u5927\uff0c\u6240\u4ee5\u5728\u76d1\u63a7\u8fd9\u4e2a\u5b57\u6bb5\u7684\u503c\u65f6\u9700\u8981\u6ce8\u610f\u3002\u53e6\u5916\u8fd9\u4e2a\u503c\u4e5f\u4e0d\u80fd\u592a\u5927\uff0c\u5efa\u8bae\u4e0d\u8981\u8d85\u8fc75000\uff0c\u5982\u679c\u592a\u5927\u53ef\u80fd\u662fredis\u5904\u7406\u592a\u6162\uff0c\u90a3\u4e48\u9700\u8981\u6392\u9664\u95ee\u9898\u627e\u51fa\u539f\u56e0\u3002<\/p>\n<\/p>\n<p>\u53e6\u5916\u8fd8\u6709\u4e00\u4e2a\u62d2\u7edd\u8fde\u63a5\u6570(rejected_connections)\u4e5f\u9700\u8981\u5173\u6ce8\uff0c\u8fd9\u4e2a\u503c\u7406\u60f3\u72b6\u6001\u662f0\u3002\u5982\u679c\u5927\u4e8e0\uff0c\u8bf4\u660e\u521b\u5efa\u7684\u8fde\u63a5\u6570\u8d85\u8fc7\u4e86maxclients\uff0c\u9700\u8981\u6392\u67e5\u539f\u56e0\u3002\u662fredis\u8fde\u63a5\u6c60\u914d\u7f6e\u4e0d\u5408\u7406\u8fd8\u662f\u8fde\u63a5\u8fd9\u4e2aredis\u5b9e\u4f8b\u7684\u670d\u52a1\u8fc7\u591a\u7b49\u3002<\/p>\n<p><strong>\u963b\u585e\u5ba2\u6237\u7aef\u6570\u91cf<\/strong><\/p>\n<p>blocked_clients\uff0c\u4e00\u822c\u662f\u6267\u884c\u4e86list\u6570\u636e\u7c7b\u578b\u7684BLPOP\u6216\u8005BRPOP\u547d\u4ee4\u5f15\u8d77\u7684\uff0c\u53ef\u901a\u8fc7\u547d\u4ee4src\/redis-cli info Clients | grep blocked_clients\u5f97\u5230\uff0c\u5f88\u660e\u663e\uff0c\u8fd9\u4e2a\u503c***\u5e94\u8be5\u4e3a0\u3002<\/p>\n<p><strong>\u4f7f\u7528\u5185\u5b58\u5cf0\u503c<\/strong><\/p>\n<p>\u76d1\u63a7redis\u4f7f\u7528\u5185\u5b58\u7684\u5cf0\u503c\uff0c\u6211\u4eec\u90fd\u77e5\u9053Redis\u53ef\u4ee5\u901a\u8fc7\u547d\u4ee4config set maxmemory 10737418240\u8bbe\u7f6e\u5141\u8bb8\u4f7f\u7528\u7684***\u5185\u5b58(\u5f3a\u70c8\u5efa\u8bae\u4e0d\u8981\u8d85\u8fc720G)\uff0c\u4e3a\u4e86\u9632\u6b62\u53d1\u751fswap\u5bfc\u81f4Redis\u6027\u80fd\u9aa4\u964d\uff0c\u751a\u81f3\u7531\u4e8e\u4f7f\u7528\u5185\u5b58\u8d85\u6807\u5bfc\u81f4\u88ab\u7cfb\u7edfkill\uff0c\u5efa\u8baeused_memory_peak\u7684\u503c\u4e0emaxmemory\u7684\u503c\u6709\u4e2a\u5b89\u5168\u533a\u95f4\uff0c\u4f8b\u59821G\uff0c\u90a3\u4e48used_memory_peak\u7684\u503c\u4e0d\u80fd\u8d85\u8fc79663676416(9G)\u3002\u53e6\u5916\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u76d1\u63a7maxmemory\u4e0d\u80fd\u5c11\u4e8e\u591a\u5c11G\uff0c\u6bd4\u59825G\u3002\u56e0\u4e3a\u6211\u4eec\u4ee5\u524d\u751f\u4ea7\u73af\u5883\u51fa\u8fc7\u8fd9\u6837\u7684\u95ee\u9898\uff0c\u8fd0\u7ef4\u4e0d\u5c0f\u5fc3\u628a10G\u914d\u7f6e\u6210\u4e861G\uff0c\u4ece\u800c\u5bfc\u81f4\u670d\u52a1\u5668\u6709\u8db3\u591f\u5185\u5b58\u5374\u4e0d\u80fd\u4f7f\u7528\u7684\u60b2\u5267\u3002<\/p>\n<p><strong>\u5185\u5b58\u788e\u7247\u7387<\/strong><\/p>\n<p>mem_fragmentation_ratio=used_memory_rss\/used_memory\uff0c\u8fd9\u4e5f\u662f\u4e00\u4e2a\u975e\u5e38\u9700\u8981\u5173\u5fc3\u7684\u6307\u6807\u3002\u5982\u679c\u662fredis4.0\u4e4b\u524d\u7684\u7248\u672c\uff0c\u8fd9\u4e2a\u95ee\u9898\u9664\u4e86\u91cd\u542f\u4e5f\u6ca1\u4ec0\u4e48\u5f88\u597d\u7684\u4f18\u5316\u529e\u6cd5\u3002\u800credis4.0\u6709\u4e00\u4e2a\u4e3b\u8981\u7279\u6027\u5c31\u662f\u4f18\u5316\u5185\u5b58\u788e\u7247\u7387\u95ee\u9898(Memory de-fragmentation)\u3002\u5728redis.conf\u914d\u7f6e\u6587\u4ef6\u4e2d\u6709\u4ecb\u7ecd\u5373ACTIVE DEFRAGMENTATION\uff1a\u788e\u7247\u6574\u7406\u5141\u8bb8Redis\u538b\u7f29\u5185\u5b58\u7a7a\u95f4\uff0c\u4ece\u800c\u56de\u6536\u5185\u5b58\u3002\u8fd9\u4e2a\u7279\u6027\u9ed8\u8ba4\u662f\u5173\u95ed\u7684\uff0c\u53ef\u4ee5\u901a\u8fc7\u547d\u4ee4CONFIG SET activedefrag yes\u70ed\u542f\u52a8\u8fd9\u4e2a\u7279\u6027\u3002<\/p>\n<ul>\n<li>\u5f53\u8fd9\u4e2a\u503c\u5927\u4e8e1\u65f6\uff0c\u8868\u793a\u5206\u914d\u7684\u5185\u5b58\u8d85\u8fc7\u5b9e\u9645\u4f7f\u7528\u7684\u5185\u5b58\uff0c\u6570\u503c\u8d8a\u5927\uff0c\u788e\u7247\u7387\u8d8a\u4e25\u91cd\u3002<\/li>\n<li>\u5f53\u8fd9\u4e2a\u503c\u5c0f\u4e8e1\u65f6\uff0c\u8868\u793a\u53d1\u751f\u4e86swap\uff0c\u5373\u53ef\u7528\u5185\u5b58\u4e0d\u591f\u3002<\/li>\n<\/ul>\n<p>\u53e6\u5916\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5f53\u5185\u5b58\u4f7f\u7528\u91cf(used_memory)\u5f88\u5c0f\u7684\u65f6\u5019\uff0c\u8fd9\u4e2a\u503c\u53c2\u8003\u4ef7\u503c\u4e0d\u5927\u3002\u6240\u4ee5\uff0c\u5efa\u8baeused_memory\u81f3\u5c111G\u4ee5\u4e0a\u624d\u8003\u8651\u5bf9\u5185\u5b58\u788e\u7247\u7387\u8fdb\u884c\u76d1\u63a7\u3002<\/p>\n<p><strong>\u7f13\u5b58***\u7387<\/strong><\/p>\n<p>keyspace_misses\/keyspace_hits\u8fd9\u4e24\u4e2a\u6307\u6807\u7528\u6765\u7edf\u8ba1\u7f13\u5b58\u7684\u547d\u4ee4\u7387\uff0ckeyspace_misses\u6307\u672a***\u6b21\u6570\uff0ckeyspace_hits\u8868\u793a***\u6b21\u6570\u3002keyspace_hits\/(keyspace_hits+keyspace_misses)\u5c31\u662f\u7f13\u5b58***\u7387\u3002\u89c6\u60c5\u51b5\u800c\u5b9a\uff0c\u5efa\u8bae0.9\u4ee5\u4e0a\uff0c\u5373\u7f13\u5b58***\u7387\u8981\u8d85\u8fc790%\u3002\u5982\u679c\u7f13\u5b58***\u7387\u8fc7\u4f4e\uff0c\u90a3\u4e48\u8981\u6392\u67e5\u5bf9\u7f13\u5b58\u7684\u7528\u6cd5\u662f\u5426\u6709\u95ee\u9898!<\/p>\n<p><strong>OPS<\/strong><\/p>\n<p>instantaneous_ops_per_sec\u8fd9\u4e2a\u6307\u6807\u8868\u793a\u7f13\u5b58\u7684OPS\uff0c\u5982\u679c\u4e1a\u52a1\u6bd4\u8f83\u5e73\u7a33\uff0c\u90a3\u4e48\u8fd9\u4e2a\u503c\u4e5f\u4e0d\u4f1a\u6ce2\u52a8\u5f88\u5927\uff0c\u4e0d\u8fc7\u56fd\u5185\u7684\u4e1a\u52a1\u6bd4\u8f83\u7279\u6027\uff0c\u5982\u679c\u4e0d\u662f\u5168\u7403\u5316\u7684\u4ea7\u54c1\uff0c\u591c\u95f4\u662f\u57fa\u672c\u4e0a\u6ca1\u6709\u4ec0\u4e48\u8bbf\u95ee\u91cf\u7684\uff0c\u6240\u4ee5\u8fd9\u4e2a\u5b57\u6bb5\u7684\u76d1\u63a7\u8981\u7ed3\u5408\u81ea\u5df1\u7684\u5177\u4f53\u4e1a\u52a1\uff0c\u4e0d\u540c\u65f6\u95f4\u6bb5\u6ce2\u52a8\u8303\u56f4\u53ef\u80fd\u6709\u6240\u4e0d\u540c\u3002<\/p>\n<p><strong>\u6301\u4e45\u5316<\/strong><\/p>\n<p>rdb_last_bgsave_status\/aof_last_bgrewrite_status\uff0c\u5373\u6700\u8fd1\u4e00\u6b21\u6216\u8005\u8bf4***\u4e00\u6b21RDB\/AOF\u6301\u4e45\u5316\u662f\u5426\u6709\u95ee\u9898\uff0c\u8fd9\u4e24\u4e2a\u503c\u90fd\u5e94\u8be5\u662f&#8221;ok&#8221;\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u7531\u4e8eredis\u6301\u4e45\u5316\u65f6\u4f1afork\u5b50\u8fdb\u7a0b\uff0c\u4e14fork\u662f\u4e00\u4e2a\u5b8c\u5168\u963b\u585e\u7684\u8fc7\u7a0b\uff0c\u6240\u4ee5\u53ef\u4ee5\u76d1\u63a7fork\u8017\u65f6\u5373latest_fork_usec\uff0c\u5355\u4f4d\u662f\u5fae\u5999\uff0c\u5982\u679c\u8fd9\u4e2a\u503c\u6bd4\u8f83\u5927\u4f1a\u5f71\u54cd\u4e1a\u52a1\uff0c\u751a\u81f3\u51fa\u73b0timeout\u3002<\/p>\n<p><strong>\u5931\u6548KEY<\/strong><\/p>\n<p>\u5982\u679c\u628aRedis\u5f53\u7f13\u5b58\u4f7f\u7528\uff0c\u90a3\u4e48\u5efa\u8bae\u6240\u6709\u7684key\u90fd\u8bbe\u7f6e\u4e86expire\u5c5e\u6027\uff0c\u901a\u8fc7\u547d\u4ee4src\/redis-cli info Keyspace\u5f97\u5230\u6bcf\u4e2adb\u4e2dkey\u7684\u6570\u91cf\u548c\u8bbe\u7f6e\u4e86expire\u5c5e\u6027\u7684key\u7684\u5c5e\u6027\uff0c\u4e14expires\u9700\u8981\u7b49\u4e8ekeys\uff1a&nbsp;<\/p>\n<\/p>\n<pre>#&nbsp;Keyspace&nbsp;\r\ndb0:keys=30,expires=30,avg_ttl=0&nbsp;\r\ndb0:keys=23,expires=22,avg_ttl=0&nbsp;\r\n<\/pre>\n<p><strong>\u6162\u65e5\u5fd7<\/strong><\/p>\n<p>\u901a\u8fc7\u547d\u4ee4slowlog get\u5f97\u5230Redis\u6267\u884c\u7684slowlog\u96c6\u5408\uff0c\u7406\u60f3\u60c5\u51b5\u4e0b\uff0cslowlog\u96c6\u5408\u5e94\u8be5\u4e3a\u7a7a\uff0c\u5373\u6ca1\u6709\u4efb\u4f55\u6162\u65e5\u5fd7\uff0c\u4e0d\u8fc7\uff0c\u6709\u65f6\u5019\u7531\u4e8e\u7f51\u7edc\u6ce2\u52a8\u7b49\u539f\u56e0\u9020\u6210set key value\u8fd9\u79cd\u547d\u4ee4\u6267\u884c\u4e5f\u9700\u8981\u51e0\u6beb\u79d2\uff0c\u5728\u76d1\u63a7\u7684\u65f6\u5019\u6211\u4eec\u9700\u8981\u6ce8\u610f\uff0c\u800c\u4e0d\u80fd\u770b\u5230slowlog\u5c31\u60f3\u7740\u53bb\u4f18\u5316\uff0c\u7b80\u5355\u7684set\/get\u53ef\u80fd\u4e5f\u4f1a\u51fa\u73b0\u5728slowlog\u4e2d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Redis\u51e0\u4e2a\u91cd\u8981\u7684\u5065\u5eb7\u6307\u6807 \u6536&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-201559","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201559","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=201559"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201559\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}