{"id":1907,"date":"2022-05-26T15:36:22","date_gmt":"2022-05-26T15:36:22","guid":{"rendered":"https:\/\/www.ipcpu.com\/?p=1907"},"modified":"2022-07-31T15:36:57","modified_gmt":"2022-07-31T15:36:57","slug":"redis-oom","status":"publish","type":"post","link":"https:\/\/c.ipcpu.com\/2022\/05\/redis-oom\/","title":{"rendered":"Redis\u6545\u969c\u6574\u7406-RedisOOM"},"content":{"rendered":"

Redis\u6545\u969c\u6574\u7406-RedisOOM.md <\/p>\n

\u80cc\u666f\u6982\u51b5<\/a>
\u7ec6\u8282\u5206\u6790<\/a>
1. \u5f53Redis\u51fa\u73b0OOM\u65f6\uff0c\u5199\u5165\u4f1a\u62a5\u9519\uff0c\u90a3\u4e48\u8fd8\u80fd\u8bfb\u6570\u636e\u5417\uff1f<\/a>
2. Redis\u662f\u6709LRU\u7684\uff0c\u4eceOOM\u51fa\u73b0\u5230\uff0c\u6267\u884clru\u6210\u529f\uff0c\u9700\u8981\u591a\u957f\u65f6\u95f4\uff1f<\/a>
3. \u5f53Redis\u53d1\u9001\u9a71\u9010\u65f6\uff0c\u76d1\u63a7\u4e0a\u4f1a\u6709\u4ec0\u4e48\u8868\u73b0\uff1f<\/a>
4. \u5f53\u53d1\u751fOOM\u9519\u8bef\u65f6\uff0cRedis\u5c42\u9762\u80fd\u5426\u770b\u5230\u5931\u8d25\u7684\u8fde\u63a5\u6570\u636e\uff1f<\/a>
5. \u4e3b\u4eceredis\uff0c \u5982\u679c\u4e3bredisOOM\u4e86\uff0c\u4eceredis\u4e0a\u5982\u4f55\u540c\u6b65\u6570\u636e\uff1f<\/a>
\u6539\u8fdb\u529e\u6cd5<\/a><\/div>\n

toc<\/a><\/p>\n

\u80cc\u666f\u6982\u51b5<\/h2>\n

\u6211\u4eec\u5728\u751f\u4ea7\u73af\u5883\u6709\u4e00\u7ec4Redis Cluster\uff0c3\u53f0Master\u8282\u70b9\uff0c3\u53f0Slave\u8282\u70b9\u3002
\n\u7531\u4e8eRedis Slave\u4e0a\u9762\u57fa\u672c\u6ca1\u5565\u91cf\uff0c\u6240\u4ee5\u6211\u4eec\u7684redis_exporter\u4ec5\u57283\u53f0Master\u8282\u70b9\u4e0a\u5b89\u88c5\u4e86\u3002
\n\u5927\u5bb6\u53ef\u80fd\u731c\u5230\u4e86\uff0c\u5c31\u662f\u5728Redis Master\u548cSlave\u5207\u6362\u4ee5\u540e\uff0c\u6211\u4eec\u6ca1\u6709\u53ca\u65f6\u53d1\u73b0\uff0c\u6240\u4ee5\u6211\u4eec\u770b\u5230\u5176\u4e2d1\u53f0Redis\u8282\u70b9\u5185\u5b58\u4f7f\u7528\u7387\u4e00\u76f4\u662f97%-98%\u5de6\u53f3\uff0c\u633a\u957f\u65f6\u95f4\u7684\u4e5f\u6ca1\u6709\u5728\u610f\u3002\u76f4\u5230\u67d0\u5929\uff0c\u5f00\u53d1\u540c\u5b66\u53cd\u9988\uff0cRedis\u62a5\u9519\u4e86<\/p>\n

\n
OOM command not allowed when used memory > 'maxmemory'<\/code><\/pre>\n<\/div>\n
\u767b\u5f55\u670d\u52a1\u5668\u67e5\u770b\uff0c\u6211\u4eec\u53d1\u73b0\uff0c\u90a3\u4e2a98%\u5185\u5b58\u7684\u8282\u70b9\u4e00\u76f4\u662fSlave\u8282\u70b9\uff0c\u800c\u771f\u6b63\u7684Master\u8282\u70b9\u5e76\u6ca1\u6709\u5b89\u88c5redis_exporter\uff0c\u4e5f\u6ca1\u6709\u76d1\u63a7\u6570\u636e\u3002<\/p>\n
\u7ec6\u8282\u5206\u6790<\/h2>\n
\u6d41\u7a0b\u4e0a\u548c\u601d\u60f3\u4e0a\u7684\u95ee\u9898\u5c31\u4e0d\u591a\u8bf4\u4e86\uff0c\u6211\u4eec\u6765\u5177\u4f53\u5206\u6790\u4e0b\u4e00\u4e9b\u7ec6\u8282\uff1a<\/p>\n
1. \u5f53Redis\u51fa\u73b0OOM\u65f6\uff0c\u5199\u5165\u4f1a\u62a5\u9519\uff0c\u90a3\u4e48\u8fd8\u80fd\u8bfb\u6570\u636e\u5417\uff1f<\/h4>\n
\u8bfb\u6570\u636e\u6b63\u5e38\uff0c\u5199\u6570\u636e\u62a5\u9519\u3002<\/p>\n
2. Redis\u662f\u6709LRU\u7684\uff0c\u4eceOOM\u51fa\u73b0\u5230\uff0c\u6267\u884clru\u6210\u529f\uff0c\u9700\u8981\u591a\u957f\u65f6\u95f4\uff1f<\/h4>\n
RedisOOM\u540e\uff0c\u63a5\u53d7\u5230\u4efb\u4f55\u4e00\u4e2a\u547d\u4ee4\u90fd\u4f1a\u5224\u65ad used memory > maxmemory\uff0c \u5982\u679c\u7b26\u5408\u6761\u4ef6\uff0c\u542f\u52a8LRU\u7b56\u7565\u3002 
\n\u5f53\u9a71\u9010\u7b56\u7565\u4e3avolatile-lru\uff0c\u4f46\u662fredis\u5185\u5b58\u4e2d\u6240\u6709\u7684key\u90fd\u6ca1\u6709\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\uff0c\u90a3\u4e48redis\u4f1a\u4e00\u76f4\u5904\u5728\u62a5\u9519\u4e2d\uff0c\u76f4\u5230\u624b\u5de5\u5220\u9664\u4e00\u4e9b\u6570\u636e\u3002<\/p>\n
3. \u5f53Redis\u53d1\u9001\u9a71\u9010\u65f6\uff0c\u76d1\u63a7\u4e0a\u4f1a\u6709\u4ec0\u4e48\u8868\u73b0\uff1f<\/h4>\n
\u5f53\u53d1\u751fredis\u53d1\u751f\u9a71\u9010\u65f6\uff0cmaster\u8282\u70b9\u4f1a\u6709evict\u884c\u4e3a\u901a\u8fc7rate(redis_evicted_keys_total)\u53ef\u4ee5\u76d1\u63a7\u5230\uff0cslave\u8282\u70b9\u4f1a\u5b58\u5728\u5927\u91cfDEL\u64cd\u4f5c\u884c\u4e3a\uff0c\u901a\u8fc7 rate(redis_commands_duration_seconds_total{cmd=\"del\"}[1m]) \u6307\u6807\u53ef\u4ee5\u76d1\u63a7\u5230\uff0c\u6b64\u65f6master\u8282\u70b9\u5e76\u4e0d\u4f1a\u51fa\u73b0DEL\u64cd\u4f5c\u884c\u4e3a\u3002<\/p>\n
4. \u5f53\u53d1\u751fOOM\u9519\u8bef\u65f6\uff0cRedis\u5c42\u9762\u80fd\u5426\u770b\u5230\u5931\u8d25\u7684\u8fde\u63a5\u6570\u636e\uff1f<\/h4>\n
\u4e0d\u80fd\u3002\u53ea\u80fd\u4eceevictkey\u6570\u91cf\u589e\u957f\u548c\u5185\u5b58\u4f7f\u7528\u7387\u4e0a\u6765\u5224\u65ad\u3002<\/p>\n
5. \u4e3b\u4eceredis\uff0c \u5982\u679c\u4e3bredisOOM\u4e86\uff0c\u4eceredis\u4e0a\u5982\u4f55\u540c\u6b65\u6570\u636e\uff1f<\/h4>\n
\u4e3bRedisOOM\uff0c\u5c31\u4e0d\u80fd\u5199\u5165\u4e86\uff0c\u4f1a\u53d1\u751f\u9a71\u9010\uff0c\u9a71\u9010\u540e\uff0c\u4eceRedis\u8282\u70b9\u4f1a\u5220\u9664\u5bf9\u5e94\u7684\u88ab\u9a71\u9010\u7684KEY\u3002 
\n\u5982\u679c\u4ece\u8282\u70b9maxmemory >= \u4e3b\u8282\u70b9maxmemory\uff0c\u4ece\u8282\u70b9\u4e0d\u4f1a\u4f18\u5148\u542f\u52a8\u9a71\u9010\u3002<\/p>\n
\u6539\u8fdb\u529e\u6cd5<\/h2>\n
\u6240\u6709\u7684Redis\u8282\u70b9\u90fd\u8981\u5b89\u88c5redis_exporter \u3002Redis\u4e3b\u4ece\u968f\u65f6\u90fd\u4f1a\u5207\u6362\u3002 
\n\u4e3b\u4ece\u5207\u6362\u4ee5\u540e\uff0credis_cluster_my_epoch \u4f1a\u81ea\u52a8\u52a01\u3002\u8fd9\u53ef\u4ee5\u4f5c\u4e3a\u4e3b\u4ece\u5207\u6362\u7684\u5224\u65ad\u4f9d\u636e\u3002<\/p>\n
\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1aIPCPU-\u7f51\u7edc\u4e4b\u8def<\/a> » Redis\u6545\u969c\u6574\u7406-RedisOOM<\/a><\/p>","protected":false},"excerpt":{"rendered":"
Redis\u6545\u969c\u6574\u7406-RedisOOM.md \u80cc\u666f\u6982\u51b5\u7ec6\u8282\u5206\u67901. \u5f53Redis\u51fa\u73b0OOM\u65f6\uff0c\u5199\u5165\u4f1a\u62a5\u9519\uff0c\u90a3\u4e48\u8fd8\u80fd\u8bfb\u6570\u636e\u5417\uff1f2. Redis\u662f\u6709LRU\u7684\uff0c\u4eceOOM\u51fa\u73b0\u5230\uff0c\u6267\u884clru\u6210\u529f\uff0c\u9700\u8981\u591a\u957f\u65f6\u95f4\uff1f3. \u5f53Redis\u53d1\u9001\u9a71\u9010\u65f6\uff0c\u76d1\u63a7\u4e0a\u4f1a\u6709\u4ec0\u4e48\u8868\u73b0\uff1f4. \u5f53\u53d1\u751fOOM\u9519\u8bef\u65f6\uff0cRedis\u5c42\u9762\u80fd\u5426\u770b\u5230\u5931\u8d25\u7684\u8fde\u63a5\u6570\u636e\uff1f5. \u4e3b\u4eceredis\uff0c \u5982\u679c\u4e3bredisOOM\u4e86\uff0c\u4eceredis\u4e0a\u5982\u4f55\u540c\u6b65\u6570\u636e\uff1f\u6539\u8fdb\u529e\u6cd5 toc \u80cc\u666f\u6982\u51b5 \u6211\u4eec\u5728\u751f\u4ea7\u73af\u5883\u6709\u4e00\u7ec4Redis Cluster\uff0c3\u53f0Master\u8282\u70b9\uff0c3\u53f0Slave\u8282\u70b9\u3002 \u7531\u4e8eRedis Slave\u4e0a\u9762\u57fa\u672c\u6ca1\u5565\u91cf\uff0c\u6240\u4ee5\u6211\u4eec\u7684redis_exporter\u4ec5\u57283\u53f0Master\u8282\u70b9\u4e0a\u5b89\u88c5\u4e86\u3002 \u5927\u5bb6\u53ef\u80fd\u731c\u5230\u4e86\uff0c\u5c31\u662f\u5728Redis Master\u548cSlave\u5207\u6362\u4ee5\u540e\uff0c\u6211\u4eec\u6ca1\u6709\u53ca\u65f6\u53d1\u73b0\uff0c\u6240\u4ee5\u6211\u4eec\u770b\u5230\u5176\u4e2d1\u53f0Redis\u8282\u70b9\u5185\u5b58\u4f7f\u7528\u7387\u4e00\u76f4\u662f97%-98%\u5de6\u53f3\uff0c\u633a\u957f\u65f6\u95f4\u7684\u4e5f\u6ca1\u6709\u5728\u610f\u3002\u76f4\u5230\u67d0\u5929\uff0c\u5f00\u53d1\u540c\u5b66\u53cd\u9988\uff0cRedis\u62a5\u9519\u4e86 OOM command not allowed when used memory > ‘maxmemory’ \u767b\u5f55\u670d\u52a1\u5668\u67e5\u770b\uff0c\u6211\u4eec\u53d1\u73b0\uff0c\u90a3\u4e2a98%\u5185\u5b58\u7684\u8282\u70b9\u4e00\u76f4\u662fSlave\u8282\u70b9\uff0c\u800c\u771f\u6b63\u7684Master\u8282\u70b9\u5e76\u6ca1\u6709\u5b89\u88c5redis_exporter\uff0c\u4e5f\u6ca1\u6709\u76d1\u63a7\u6570\u636e\u3002 \u7ec6\u8282\u5206\u6790 \u6d41\u7a0b\u4e0a\u548c\u601d\u60f3\u4e0a\u7684\u95ee\u9898\u5c31\u4e0d\u591a\u8bf4\u4e86\uff0c\u6211\u4eec\u6765\u5177\u4f53\u5206\u6790\u4e0b\u4e00\u4e9b\u7ec6\u8282\uff1a 1. \u5f53Redis\u51fa\u73b0OOM\u65f6\uff0c\u5199\u5165\u4f1a\u62a5\u9519\uff0c\u90a3\u4e48\u8fd8\u80fd\u8bfb\u6570\u636e\u5417\uff1f \u8bfb\u6570\u636e\u6b63\u5e38\uff0c\u5199\u6570\u636e\u62a5\u9519\u3002 2. Redis\u662f\u6709LRU\u7684\uff0c\u4eceOOM\u51fa\u73b0\u5230\uff0c\u6267\u884clru\u6210\u529f\uff0c\u9700\u8981\u591a\u957f\u65f6\u95f4\uff1f RedisOOM\u540e\uff0c\u63a5\u53d7\u5230\u4efb\u4f55\u4e00\u4e2a\u547d\u4ee4\u90fd\u4f1a\u5224\u65ad used memory > maxmemory\uff0c \u5982\u679c\u7b26\u5408\u6761\u4ef6\uff0c\u542f\u52a8LRU\u7b56\u7565\u3002 \u5f53\u9a71\u9010\u7b56\u7565\u4e3avolatile-lru\uff0c\u4f46\u662fredis\u5185\u5b58\u4e2d\u6240\u6709\u7684key\u90fd\u6ca1\u6709\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\uff0c\u90a3\u4e48redis\u4f1a\u4e00\u76f4\u5904\u5728\u62a5\u9519\u4e2d\uff0c\u76f4\u5230\u624b\u5de5\u5220\u9664\u4e00\u4e9b\u6570\u636e\u3002 3. \u5f53Redis\u53d1\u9001\u9a71\u9010\u65f6\uff0c\u76d1\u63a7\u4e0a\u4f1a\u6709\u4ec0\u4e48\u8868\u73b0\uff1f \u5f53\u53d1\u751fredis\u53d1\u751f\u9a71\u9010\u65f6\uff0cmaster\u8282\u70b9\u4f1a\u6709evict\u884c\u4e3a\u901a\u8fc7rate(redis_evicted_keys_total)\u53ef\u4ee5\u76d1\u63a7\u5230\uff0cslave\u8282\u70b9\u4f1a\u5b58\u5728\u5927\u91cfDEL\u64cd\u4f5c\u884c\u4e3a\uff0c\u901a\u8fc7 rate(redis_commands_duration_seconds_total{cmd=”del”}[1m]) \u6307\u6807\u53ef\u4ee5\u76d1\u63a7\u5230\uff0c\u6b64\u65f6master\u8282\u70b9\u5e76\u4e0d\u4f1a\u51fa\u73b0DEL\u64cd\u4f5c\u884c\u4e3a\u3002 4. \u5f53\u53d1\u751fOOM\u9519\u8bef\u65f6\uff0cRedis\u5c42\u9762\u80fd\u5426\u770b\u5230\u5931\u8d25\u7684\u8fde\u63a5\u6570\u636e\uff1f \u4e0d\u80fd\u3002\u53ea\u80fd\u4eceevictkey\u6570\u91cf\u589e\u957f\u548c\u5185\u5b58\u4f7f\u7528\u7387\u4e0a\u6765\u5224\u65ad\u3002 5. \u4e3b\u4eceredis\uff0c \u5982\u679c\u4e3bredisOOM\u4e86\uff0c\u4eceredis\u4e0a\u5982\u4f55\u540c\u6b65\u6570\u636e\uff1f \u4e3bRedisOOM\uff0c\u5c31\u4e0d\u80fd\u5199\u5165\u4e86\uff0c\u4f1a\u53d1\u751f\u9a71\u9010\uff0c\u9a71\u9010\u540e\uff0c\u4eceRedis\u8282\u70b9\u4f1a\u5220\u9664\u5bf9\u5e94\u7684\u88ab\u9a71\u9010\u7684KEY\u3002 \u5982\u679c\u4ece\u8282\u70b9maxmemory >= \u4e3b\u8282\u70b9maxmemory\uff0c\u4ece\u8282\u70b9\u4e0d\u4f1a\u4f18\u5148\u542f\u52a8\u9a71\u9010\u3002 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[142],"_links":{"self":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts\/1907"}],"collection":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/comments?post=1907"}],"version-history":[{"count":1,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts\/1907\/revisions"}],"predecessor-version":[{"id":1908,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts\/1907\/revisions\/1908"}],"wp:attachment":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/media?parent=1907"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/categories?post=1907"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/tags?post=1907"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}