{"id":201173,"date":"2025-05-10T08:51:39","date_gmt":"2025-05-10T00:51:39","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201173\/"},"modified":"2025-05-10T08:51:39","modified_gmt":"2025-05-10T00:51:39","slug":"%e5%a6%82%e4%bd%95%e9%ab%98%e6%95%88%e4%bd%bf%e7%94%a8redis%e4%bd%9c%e4%b8%balru%e7%bc%93%e5%ad%98","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201173\/","title":{"rendered":"\u5982\u4f55\u9ad8\u6548\u4f7f\u7528Redis\u4f5c\u4e3aLRU\u7f13\u5b58"},"content":{"rendered":"

<\/b> <\/p>\n

\u5982\u4f55\u9ad8\u6548\u4f7f\u7528Redis\u4f5c\u4e3aLRU\u7f13\u5b58<\/h1>\n

<\/i>\u6536\u85cf<\/span> <\/p>\n

\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300a\u5982\u4f55\u9ad8\u6548\u4f7f\u7528Redis\u4f5c\u4e3aLRU\u7f13\u5b58\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~<\/p>\n

\u5f53\u7528Redis\u4f5c\u4e3a\u4e00\u4e2aLRU\u5b58\u50a8\u65f6\uff0c\u6709\u4e9b\u65f6\u5019\u662f\u6bd4\u8f83\u65b9\u4fbf\u7684\uff0c\u5728\u4f60\u589e\u6dfb\u65b0\u7684\u6570\u636e\u65f6\u4f1a\u81ea\u52a8\u9a71\u9010\u65e7\u7684\u6570\u636e\u3002\u8fd9\u79cd\u884c\u4e3a\u5728\u5f00\u53d1\u8005\u8bba\u575b\u662f\u975e\u5e38\u6709\u540d\u7684\uff0c\u56e0\u4e3a\u8fd9\u662f\u6d41\u884c\u7684memcached\u7cfb\u7edf\u7684\u9ed8\u8ba4\u884c\u4e3a\u3002<\/p>\n

LRU\u5b9e\u9645\u4e0a\u53ea\u662f\u652f\u6301\u9a71\u9010\u7684\u65b9\u5f0f\u4e4b\u4e00\u3002\u8fd9\u9875\u5305\u542b\u66f4\u591a\u4e00\u822c\u7684Redis maxmemory\u6307\u4ee4\u7684\u8bdd\u9898\u7528\u4e8e\u9650\u5236\u5185\u5b58\u4f7f\u7528\u5230\u4e00\u4e2a\u5b9a\u989d\uff0c\u540c\u65f6\u5b83\u4e5f\u6df1\u5165\u7684\u6db5\u76d6\u4e86Redis\u6240\u4f7f\u7528\u7684LRU\u7b97\u6cd5\uff0c\u5b9e\u9645\u4e0a\u662f\u7cbe\u786eLRU\u7684\u8fd1\u4f3c\u503c\u3002<\/p>\n

\u4e00\u3001Maxmemory\u8bbe\u7f6e\u6307\u4ee4<\/strong><\/span><\/p>\n

Maxmemory\u8bbe\u7f6e\u6307\u4ee4\u7528\u4e8e\u914d\u7f6eRedis\u7684\u6570\u636e\u96c6\u4f7f\u7528\u6307\u5b9a\u91cf\u7684\u5185\u5b58\u3002\u53ef\u4ee5\u7528redis conf.file\u8bbe\u7f6e\u6307\u4ee4,\u6216\u8005\u53ef\u4ee5\u5728\u7a0d\u665a\u7684\u65f6\u5019\u5728\u8fd0\u884c\u65f6\u95f4\u7528config set\u547d\u4ee4\u3002<\/p>\n

\u4f8b\u5982\uff0c\u4e3a\u4e86\u8bbe\u7f6e\u5185\u5b58\u5c40\u9650\u4e8e100\u767e\u4e07\u5b57\u8282\uff0c\u4e0b\u5217\u6307\u4ee4\u53ef\u5728redis.conf file\u5185\u4f7f\u7528\u3002\u8bbe\u7f6emaxmemory\u5230\u96f6\u4f7f\u5f97\u6ca1\u6709\u5185\u5b58\u9650\u5236\u3002\u8fd9\u662f64\u4f4d\u7cfb\u7edf\u7684\u9ed8\u8ba4\u884c\u4e3a\uff0c\u800c32\u4f4d\u7cfb\u7edf\u4f7f\u75283GB\u5185\u9690\u8bb0\u5fc6\u6781\u9650\u3002<\/p>\n

maxmemory 100mb<\/code><\/p>\n

\u5f53\u8fbe\u5230\u6307\u5b9a\u91cf\u7684\u5185\u5b58\u540e\uff0c\u5c31\u53ef\u4ee5\u9009\u62e9\u4e0d\u540c\u7684\u884c\u4e3a\uff0c\u79f0\u4e3a\u7b56\u7565\u3002Redis\u53ef\u4ee5\u8fd4\u56de\u9519\u8bef\u7684\u6307\u4ee4\uff0c\u5bfc\u81f4\u4f7f\u7528\u66f4\u591a\u7684\u5185\u5b58\uff0c\u6216\u8005\u4e3a\u4e86\u6bcf\u6b21\u589e\u52a0\u65b0\u7684\u6570\u636e\u540e\u8fd4\u56de\u6307\u5b9a\u7684\u5185\u5b58\uff0c\u5b83\u53ef\u4ee5\u9a71\u9010\u4e00\u4e9b\u65e7\u7684\u6570\u636e\u3002<\/p>\n

\u4e8c\u3001\u9a71\u9010\u7b56\u7565<\/strong><\/span><\/p>\n

\u5f53\u5230\u8fbemaxmemory\u6781\u9650\u65f6\uff0c\u4f7f\u7528maxmemory-\u7b56\u7565\u914d\u7f6e\u6307\u4ee4\u6765\u6267\u884c\u5177\u4f53\u7684Redis\u52a8\u4f5c\u3002<\/p>\n

\u4ee5\u4e0b\u7b56\u7565\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n

1\u3001noeviction\uff1a\u8fbe\u5230\u5185\u5b58\u9650\u989d\u540e\u8fd4\u56de\u9519\u8bef\uff0c\u5ba2\u6237\u5c1d\u8bd5\u53ef\u4ee5\u5bfc\u81f4\u66f4\u591a\u5185\u5b58\u4f7f\u7528\u7684\u547d\u4ee4\uff08\u5927\u90e8\u5206\u5199\u547d\u4ee4\uff0c\u4f46DEL\u548c\u4e00\u4e9b\u4f8b\u5916\uff09<\/p>\n

2\u3001allkeys-lru\uff1a\u4e3a\u4e86\u7ed9\u65b0\u589e\u52a0\u7684\u6570\u636e\u817e\u51fa\u7a7a\u95f4\uff0c\u9a71\u9010\u952e\u5148\u8bd5\u56fe\u79fb\u9664\u4e00\u90e8\u5206\u6700\u8fd1\u4f7f\u7528\u8f83\u5c11\u7684\uff08LRC\uff09\u3002<\/p>\n

3\u3001volatile-lru\uff1a\u4e3a\u4e86\u7ed9\u65b0\u589e\u52a0\u7684\u6570\u636e\u817e\u51fa\u7a7a\u95f4\uff0c\u9a71\u9010\u952e\u5148\u8bd5\u56fe\u79fb\u9664\u4e00\u90e8\u5206\u6700\u8fd1\u4f7f\u7528\u8f83\u5c11\u7684\uff08LRC\uff09\uff0c\u4f46\u53ea\u9650\u4e8e\u8fc7\u671f\u8bbe\u7f6e\u952e\u3002<\/p>\n

4\u3001allkeys-random: \u4e3a\u4e86\u7ed9\u65b0\u589e\u52a0\u7684\u6570\u636e\u817e\u51fa\u7a7a\u95f4\uff0c\u9a71\u9010\u4efb\u610f\u952e\u3002<\/p>\n

5\u3001volatile-random: \u4e3a\u4e86\u7ed9\u65b0\u589e\u52a0\u7684\u6570\u636e\u817e\u51fa\u7a7a\u95f4\uff0c\u9a71\u9010\u4efb\u610f\u952e\uff0c\u4f46\u53ea\u9650\u4e8e\u6709\u8fc7\u671f\u8bbe\u7f6e\u7684\u9a71\u9010\u952e\u3002<\/p>\n

6\u3001volatile-ttl: \u4e3a\u4e86\u7ed9\u65b0\u589e\u52a0\u7684\u6570\u636e\u817e\u51fa\u7a7a\u95f4\uff0c\u9a71\u9010\u952e\u53ea\u6709\u79d8\u94a5\u8fc7\u671f\u8bbe\u7f6e\uff0c\u5e76\u4e14\u9996\u5148\u5c1d\u8bd5\u7f29\u77ed\u5b58\u6d3b\u65f6\u95f4\u7684\u9a71\u9010\u952e\u3002<\/p>\n

\u5982\u679c\u6ca1\u6709\u79d8\u94a5\u53bb\u9a71\u9010\u5339\u914d\u5148\u51b3\u6761\u4ef6\uff0c\u7b56\u7565volatile-lru, volatile-random \u548cvolatile-ttl\u884c\u4e3a\u5f88\u50cfnoeviction\u3002<\/p>\n

\u90a3\u4e48\u6839\u636e\u4f60\u5e94\u7528\u7684\u8bbf\u95ee\u6a21\u5f0f\u9009\u62e9\u6b63\u786e\u7684\u9a71\u9010\u7b56\u7565\u662f\u5f88\u91cd\u8981\u7684\u3002\u7136\u800c\u5728\u5e94\u7528\u8fd0\u884c\u65f6\u4f60\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u95f4\u91cd\u65b0\u8bbe\u7f6e\u7b56\u7565\uff0c\u5e76\u4e14\u76d1\u63a7\u7f13\u5b58\u7f3a\u5931\u7684\u6570\u91cf\u5e76\u4e3a\u4e86\u8c03\u6574\u4f60\u7684\u8bbe\u7f6e\u70b9\u51fbRedis\u4fe1\u606f\u8f93\u51fa\u3002<\/p>\n

\u4e09\u3001\u8fd1\u4f3cLRU\u7b97\u6cd5<\/strong><\/span><\/p>\n

Redis\u7684LRU\u7b97\u6cd5\u4e0d\u662f\u51c6\u786e\u7684\u5b9e\u73b0\u3002\u4e5f\u5c31\u662f\u8bf4Redis\u6ca1\u6709\u4e3a\u9010\u51fa\u9009\u62e9 \u6700\u597d\u7684\u5019\u9009\u4eba \uff0c\u4e5f\u5c31\u662f\u6ca1\u6709\u9009\u62e9\u8fc7\u53bb\u6700\u540e\u88ab\u8bbf\u95ee\u79bb\u73b0\u5728\u6700\u4e45\u7684\u3002\u53cd\u800c \u662f\u53bb\u6267\u884c\u4e00\u4e2a \u8fd1\u4f3cLRU\u7684\u7b97\u6cd5\uff0c\u901a\u8fc7\u62bd\u6837\u5c11\u91cf\u7684key\uff0c\u5e76\u4e14\u9010\u51fa\u62bd\u6837\u4e2d\u6700\u540e\u88ab\u8bbf\u95ee\u79bb\u73b0\u5728\u6700\u4e45\u7684key\uff08\u6700\u8001\u7684\u8bbf\u95ee\u65f6\u95f4\uff09\u3002<\/p>\n

\u5728Redis 3.0\uff08\u76ee\u524d\u7684\u6d4b\u8bd5\u7248\uff09\uff0c\u7b97\u6cd5\u88ab\u6539\u8fdb\u4e86\uff0c\u4f7f\u7528\u4e86\u4e00\u4e2a\u9010\u51fa\u6700\u4f73\u5019\u9009\u6c60\u3002\u6539\u8fdb\u4e86\u7b97\u6cd5\u7684\u6027\u80fd\uff0c\u4f7f\u5b83\u66f4\u52a0\u8fd1\u4f3c\u771f\u6b63LRU\u7b97\u6cd5\u3002<\/p>\n

\u7b97\u6cd5\u4e2d\uff0c\u5173\u4e8e\u9010\u51fa\u68c0\u6d4b\u7684\u6837\u54c1\u6570\u91cf\uff0c\u4f60\u53ef\u4ee5\u81ea\u5df1\u53bb\u8c03\u6574\u3002\u914d\u7f6e\u53c2\u6570\u662f\uff1a<\/p>\n

maxmemory-samples 5<\/code><\/p>\n

Redis\u6ca1\u6709\u4f7f\u7528\u771f\u6b63\u5b9e\u73b0LRU\u7b97\u662f\u7684\u539f\u56e0\u662f\uff0c\u56e0\u4e3a\u6d88\u8017\u66f4\u591a\u7684\u5185\u5b58\u3002\u7136\u800c\u5bf9\u4e8e\u4f7f\u7528Redis\u7684\u5e94\u7528\u6765\u8bf4\uff0c\u4e8b\u5b9e\u4e0a\u662f\u7b49\u4ef7\u7684\u3002\u4e0b\u9762\u662fRedis\u7684LRU\u7b97\u6cd5\u548c\u771f\u6b63LRU\u7b97\u6cd5\u7684\u6bd4\u8f83\uff1a<\/p>\n

<\/p>\n

\u7ed9\u51fa\u914d\u7f6e\u6570\u91cf\u7684key\u751f\u6210\u4e0a\u9762\u7684\u56fe\u8868\u3002key\u4ece\u7b2c\u4e00\u884c\u5230\u6700\u540e\u4e00\u884c\u88ab\u8bbf\u95ee\uff0c\u90a3\u4e48\u7b2c\u4e00\u4e2akey\u662fLRU\u7b97\u6cd5\u4e2d\u6700\u597d\u7684\u9010\u51fa\u5019\u9009\u8005\u3002\u4e4b\u540e\u670950%\u7684key\u88ab\u6dfb\u52a0\uff0c\u90a3\u4e48\u4e00\u534a\u7684\u65e7key\u88ab\u9010\u51fa\u3002<\/p>\n

\u5728\u4e0a\u56fe\u4e2d\u4f60\u53ef\u4ee5\u770b\u89c13\u4e2a\u660e\u663e\u7684\u533a\u522b\uff1a<\/p>\n

1\u3001\u6d45\u7070\u8272\u5e26\u662f\u88ab\u9010\u51fa\u7684\u5bf9\u8c61\u3002<\/p>\n

2\u3001\u7070\u8272\u5e26\u662f\u6ca1\u6709\u88ab\u9010\u51fa\u7684\u5bf9\u8c61\u3002<\/p>\n

3\u3001\u7eff\u8272\u5e26\u662f\u88ab\u6dfb\u52a0\u7684\u5bf9\u8c61\u3002<\/p>\n

LRU\u7406\u8bba\u5b9e\u73b0\u662f\u5728\u6240\u6709\u7684\u65e7key\u4e2d\u524d\u4e00\u534a\u88ab\u9010\u51fa\u3002Redis\u4f7f\u7528\u7684\u662f\u8fd1\u4f3c\u8fc7\u671f\u7684key\u88ab\u9010\u51fa\u3002<\/p>\n

\u5982\u4f60\u6240\u89c1\uff0c3.0\u7684\u5de5\u4f5c\u6bd42.8\u66f4\u597d\uff0c\u7136\u800c\u57282.8\u7248\u672c\u4e2d\uff0c\u5927\u591a\u6570\u6700\u65b0\u8bbf\u95ee\u5bf9\u8c61\u7684\u4ecd\u7136\u4fdd\u7559\u3002\u57283.0\u4f7f\u7528\u6837\u54c1\u4e3a10 \u65f6\uff0c\u6027\u80fd\u975e\u5e38\u63a5\u8fd1\u7406\u8bba\u4e0a\u7684LRU\u7b97\u6cd5\u3002<\/p>\n

\u6ce8\u610f\uff1aLRU\u4ec5\u4ec5\u662f\u4e00\u4e2a\u9884\u6d4b\u6a21\u5f0f\uff0c\u7ed9\u51fa\u7684key\u5f88\u53ef\u80fd\u5728\u672a\u6765\u88ab\u8bbf\u95ee\u3002\u6b64\u5916\uff0c\u5982\u679c\u4f60\u7684\u6570\u636e\u8bbf\u95ee\u6a21\u5f0f\u7c7b\u4f3c\u4e8e\u5e42\u5f8b\uff08\u7ebf\u6027\u7684\uff09\uff0c\u5927\u591a\u6570key\u90fd\u53ef\u80fd\u88ab\u8bbf\u95ee\u90a3\u4e48\u8fd9\u4e2aLRU\u7b97\u6cd5\u7684\u5904\u7406\u5c31\u662f\u975e\u5e38\u597d\u7684\u3002<\/p>\n

\u5728\u5b9e\u6218\u4e2d \uff0c\u6211\u4eec\u53d1\u73b0\u4f7f\u7528\u5e42\u5f8b\uff08\u7ebf\u6027\u7684\uff09\u7684\u8bbf\u95ee\u6a21\u5f0f\uff0c\u5728\u771f\u6b63\u7684LRU\u7b97\u6cd5\u548cRedis\u7684LRU\u7b97\u6cd5\u4e4b\u95f4\u5dee\u5f02\u5f88\u5c0f\u6216\u8005\u4e0d\u5b58\u5728\u5dee\u5f02\u3002<\/p>\n

\u4f60\u53ef\u4ee5\u63d0\u5347\u6837\u54c1\u5927\u5c0f\u914d\u7f6e\u523010\uff0c\u5b83\u5c06\u63a5\u8fd1\u771f\u6b63\u7684LRU\u7b97\u6cd5\uff0c\u5e76\u4e14\u6709\u4e0d\u540c\u9519\u8fc7\u7387\uff0c\u4f46\u662f\u8981\u6d88\u8017\u66f4\u591a\u7684CPU\u3002<\/p>\n

\u5728\u8c03\u8bd5\u65f6\u4f7f\u7528\u4e0d\u540c\u7684\u6837\u54c1\u5927\u5c0f\u53bb\u8c03\u8bd5\u975e\u5e38\u7b80\u5355\uff0c\u4f7f\u7528\u547d\u4ee4CONFIG SET maxmemory-samples \u5b9e\u73b0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u5982\u4f55\u9ad8\u6548\u4f7f\u7528Redis\u4f5c\u4e3aLRU...<\/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-201173","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201173","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=201173"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201173\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201173"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201173"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}