{"id":201229,"date":"2025-05-10T09:34:22","date_gmt":"2025-05-10T01:34:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201229\/"},"modified":"2025-05-10T09:34:22","modified_gmt":"2025-05-10T01:34:22","slug":"%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3redis%e5%86%85%e5%ad%98%e6%b7%98%e6%b1%b0%e7%ad%96%e7%95%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201229\/","title":{"rendered":"\u6df1\u5165\u7406\u89e3Redis\u5185\u5b58\u6dd8\u6c70\u7b56\u7565"},"content":{"rendered":"

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

\u6df1\u5165\u7406\u89e3Redis\u5185\u5b58\u6dd8\u6c70\u7b56\u7565<\/h1>\n

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

\u5bf9\u4e8e\u4e00\u4e2a\u6570\u636e\u5e93\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u7262\u56fa\u624e\u5b9e\u7684\u57fa\u7840\u662f\u5341\u5206\u91cd\u8981\u7684\uff0cgolang\u5b66\u4e60\u7f51\u5c31\u6765\u5e26\u5927\u5bb6\u4e00\u70b9\u70b9\u7684\u638c\u63e1\u57fa\u7840\u77e5\u8bc6\u70b9\u3002\u4eca\u5929\u672c\u7bc7\u6587\u7ae0\u5e26\u5927\u5bb6\u4e86\u89e3\u300a\u6df1\u5165\u7406\u89e3Redis\u5185\u5b58\u6dd8\u6c70\u7b56\u7565\u300b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e86Redis\u5185\u5b58\u6dd8\u6c70\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u5feb\u70b9\u6536\u85cf\u8d77\u6765\u5427\uff0c\u5426\u5219\u9700\u8981\u65f6\u5c31\u627e\u4e0d\u5230\u4e86\uff01<\/p>\n

\u4e00\u3001\u5185\u5b58\u56de\u6536<\/h2>\n

\u957f\u65f6\u95f4\u4e0d\u4f7f\u7528\u7684\u7f13\u5b58<\/p>\n

    \n
  • \u964d\u4f4eIO\u6027\u80fd<\/li>\n
  • \u7269\u7406\u5185\u5b58\u4e0d\u591f<\/li>\n<\/ul>\n

    \u5f88\u591a\u4eba\u4e86\u89e3\u4e86Redis\u7684\u597d\u5904\u4e4b\u540e\uff0c\u4e8e\u662f\u628a\u4efb\u4f55\u6570\u636e\u90fd\u5f80Redis\u4e2d\u653e\uff0c\u5982\u679c\u4f7f\u7528\u4e0d\u5408\u7406\u5f88\u5bb9\u6613\u5bfc\u81f4\u6570\u636e\u8d85\u8fc7Redis\u7684\u5185\u5b58\uff0c\u8fd9\u79cd\u60c5\u51b5\u4f1a\u51fa\u73b0\u4ec0\u4e48\u95ee\u9898\u5462\uff1f<\/p>\n

      \n
    • Redis\u4e2d\u6709\u5f88\u591a\u65e0\u6548\u7684\u7f13\u5b58\uff0c\u8fd9\u4e9b\u7f13\u5b58\u6570\u636e\u4f1a\u964d\u4f4e\u6570\u636eIO\u7684\u6027\u80fd\uff0c\u56e0\u4e3a\u4e0d\u540c\u7684\u6570\u636e\u7c7b\u578b\u65f6\u95f4\u590d\u6742\u5ea6\u7b97\u6cd5\u4e0d\u540c\uff0c\u6570\u636e\u8d8a\u591a\u53ef\u80fd\u4f1a\u9020\u6210\u6027\u80fd\u4e0b\u964d<\/li>\n
    • \u968f\u7740\u7cfb\u7edf\u7684\u8fd0\u884c\uff0credis\u7684\u6570\u636e\u8d8a\u6765\u8d8a\u591a\uff0c\u4f1a\u5bfc\u81f4\u7269\u7406\u5185\u5b58\u4e0d\u8db3\u3002\u901a\u8fc7\u4f7f\u7528\u865a\u62df\u5185\u5b58\uff08VM\uff09\uff0c\u5c06\u5f88\u5c11\u8bbf\u95ee\u7684\u6570\u636e\u4ea4\u6362\u5230\u78c1\u76d8\u4e0a\uff0c\u817e\u51fa\u5185\u5b58\u7a7a\u95f4\u7684\u65b9\u6cd5\u6765\u89e3\u51b3\u7269\u7406\u5185\u5b58\u4e0d\u8db3\u7684\u60c5\u51b5\u3002\u867d\u7136\u80fd\u591f\u89e3\u51b3\u7269\u7406\u5185\u5b58\u4e0d\u8db3\u5bfc\u81f4\u7684\u95ee\u9898\uff0c\u4f46\u662f\u7531\u4e8e\u8fd9\u90e8\u5206\u6570\u636e\u662f\u5b58\u50a8\u5728\u78c1\u76d8\u4e0a\uff0c\u5982\u679c\u5728\u9ad8\u5e76\u53d1\u573a\u666f\u4e2d\uff0c\u9891\u7e41\u8bbf\u95ee\u865a\u62df\u5185\u5b58\u7a7a\u95f4\u4f1a\u4e25\u91cd\u964d\u4f4e\u7cfb\u7edf\u6027\u80fd\u3002<\/li>\n<\/ul>\n

      \u6240\u4ee5\u9047\u5230\u8fd9\u7c7b\u95ee\u9898\u7684\u65f6\u5019\uff0c\u6211\u4eec\u4e00\u822c\u6709\u51e0\u79cd\u65b9\u6cd5\u3002<\/p>\n

        \n
      • \u5bf9\u6bcf\u4e2a\u5b58\u50a8\u5230redis\u4e2d\u7684key\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\uff0c\u8fd9\u4e2a\u6839\u636e\u5b9e\u9645\u4e1a\u52a1\u573a\u666f\u6765\u51b3\u5b9a\u3002\u5426\u5219\uff0c\u518d\u5927\u7684\u5185\u5b58\u90fd\u4f1a\u968f\u7740\u7cfb\u7edf\u8fd0\u884c\u88ab\u6d88\u8017\u5b8c<\/li>\n
      • \u589e\u52a0\u5185\u5b58<\/li>\n
      • \u4f7f\u7528\u5185\u5b58\u6dd8\u6c70\u7b56\u7565<\/li>\n<\/ul>\n

        \u4e8c\u3001\u8bbe\u7f6e\u5185\u5b58<\/h2>\n

        \u5728\u5b9e\u9645\u751f\u4ea7\u73af\u5883\u4e2d\uff0c\u670d\u52a1\u5668\u4e0d\u4ec5\u4ec5\u53ea\u6709Redis\uff0c\u4e3a\u4e86\u907f\u514dRedis\u5185\u5b58\u4f7f\u7528\u8fc7\u591a\u5bf9\u5176\u4ed6\u7a0b\u5e8f\u9020\u6210\u5f71\u54cd\uff0c\u6211\u4eec\u4e00\u822c\u4f1a\u8bbe\u7f6e\u6700\u5927\u5185\u5b58\u3002Redis\u9ed8\u8ba4\u7684\u6700\u5927\u5185\u5b58 maxmemory=0 \uff0c\u8868\u793a\u4e0d\u9650\u5236Redis\u5185\u5b58\u7684\u4f7f\u7528\u3002\u6211\u4eec\u53ef\u4ee5\u4fee\u6539 redis.conf \u6587\u4ef6\uff0c\u8bbe\u7f6eRedis\u6700\u5927\u4f7f\u7528\u7684\u5185\u5b58\u3002<\/p>\n

        # \u5355\u4f4d\u4e3abyte\nmaxmemory \n   \n     2147483648\uff082G\uff09\n\n   <\/pre>\n
        \u5982\u4f55\u67e5\u770b\u5f53\u524dRedis\u6700\u5927\u5185\u5b58\u8bbe\u7f6e\u5462\uff0c\u8fdb\u5165\u5230Redis-Cli\u63a7\u5236\u53f0\uff0c\u8f93\u5165\u4e0b\u9762\u8fd9\u4e2a\u547d\u4ee4\u3002<\/p>\n
        config get maxmemory\n<\/pre>\n
        \u5f53Redis\u4e2d\u5b58\u50a8\u7684\u5185\u5b58\u8d85\u8fc7maxmemory\u65f6\uff0c\u4f1a\u600e\u4e48\u6837\u5462\uff1f\u4e0b\u9762\u6211\u4eec\u505a\u4e00\u4e2a\u5b9e\u9a8c<\/p>\n
        \u5728redis-cli\u63a7\u5236\u53f0\u8f93\u5165\u4e0b\u9762\u8fd9\u4e2a\u547d\u4ee4\uff0c\u628a\u6700\u5927\u5185\u5b58\u8bbe\u7f6e\u4e3a1\u4e2a\u5b57\u8282\u3002<\/p>\n
        config set maxmemory 1\n<\/pre>\n
        \u901a\u8fc7\u4e0b\u9762\u7684\u547d\u4ee4\u5b58\u50a8\u4e00\u4e2astring\u7c7b\u578b\u7684\u6570\u636e<\/p>\n
        set name mvp\n<\/pre>\n
        \u6b64\u65f6\uff0c\u63a7\u5236\u53f0\u4f1a\u5f97\u5230\u4e0b\u9762\u8fd9\u4e2a\u9519\u8bef\u4fe1\u606f<\/p>\n
        \n
        (error) OOM command not allowed when used memory > ‘maxmemory’.<\/p>\n<\/blockquote>\n
        \u4e09\u3001\u5185\u5b58\u6dd8\u6c70\u7b56\u7565<\/h2>\n
        \u8bbe\u7f6e\u4e86maxmemory\u7684\u9009\u9879\uff0credis\u5185\u5b58\u4f7f\u7528\u8fbe\u5230\u4e0a\u9650\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6eLRU\u7b97\u6cd5\u6765\u5220\u9664\u90e8\u5206key\uff0c\u91ca\u653e\u7a7a\u95f4\u3002\u9ed8\u8ba4\u662f\u6309\u7167\u8fc7\u671f\u65f6\u95f4\u7684\uff0c\u5982\u679cset\u65f6\u5019\u6ca1\u6709\u52a0\u4e0a\u8fc7\u671f\u65f6\u95f4\u5c31\u4f1a\u5bfc\u81f4\u6570\u636e\u5199\u6ee1maxmemory\u3002Redis\u4e2d\u63d0\u4f9b\u4e86\u4e00\u79cd\u5185\u5b58\u6dd8\u6c70\u7b56\u7565\uff0c\u5f53\u5185\u5b58\u4e0d\u8db3\u65f6\uff0cRedis\u4f1a\u6839\u636e\u76f8\u5e94\u7684\u6dd8\u6c70\u89c4\u5219\u5bf9key\u6570\u636e\u8fdb\u884c\u6dd8\u6c70\u3002Redis\u4e00\u5171\u63d0\u4f9b\u4e868\u79cd\u6dd8\u6c70\u7b56\u7565\uff0c\u9ed8\u8ba4\u7684\u7b56\u7565\u4e3anoeviction\uff0c\u5f53\u5185\u5b58\u4f7f\u7528\u8fbe\u5230\u9608\u503c\u7684\u65f6\u5019\uff0c\u6240\u6709\u5f15\u8d77\u7533\u8bf7\u5185\u5b58\u7684\u547d\u4ee4\u4f1a\u90fd\u4f1a\u62a5\u9519\u3002<\/p>\n
          \n
        • volatile-lru\uff0c\u9488\u5bf9\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684key\uff0c\u4f7f\u7528lru\u7b97\u6cd5\u8fdb\u884c\u6dd8\u6c70\u3002<\/li>\n
        • allkeys-lru\uff0c\u9488\u5bf9\u6240\u6709key\u4f7f\u7528lru\u7b97\u6cd5\u8fdb\u884c\u6dd8\u6c70\u3002<\/li>\n
        • volatile-lfu\uff0c\u9488\u5bf9\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684key\uff0c\u4f7f\u7528lfu\u7b97\u6cd5\u8fdb\u884c\u6dd8\u6c70\u3002<\/li>\n
        • allkeys-lfu\uff0c\u9488\u5bf9\u6240\u6709key\u4f7f\u7528lfu\u7b97\u6cd5\u8fdb\u884c\u6dd8\u6c70\u3002<\/li>\n
        • volatile-random\uff0c\u4ece\u6240\u6709\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684key\u4e2d\u4f7f\u7528\u968f\u673a\u6dd8\u6c70\u7684\u65b9\u5f0f\u8fdb\u884c\u6dd8\u6c70\u3002<\/li>\n
        • allkeys-random\uff0c\u9488\u5bf9\u6240\u6709\u7684key\u4f7f\u7528\u968f\u673a\u6dd8\u6c70\u673a\u5236\u8fdb\u884c\u6dd8\u6c70\u3002<\/li>\n
        • volatile-ttl\uff0c\u9488\u5bf9\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684key\uff0c\u8d8a\u65e9\u8fc7\u671f\u7684\u8d8a\u5148\u88ab\u6dd8\u6c70\u3002<\/li>\n
        • noeviction\uff0c\u4e0d\u4f1a\u6dd8\u6c70\u4efb\u4f55\u6570\u636e\uff0c\u5f53\u4f7f\u7528\u7684\u5185\u5b58\u7a7a\u95f4\u8d85\u8fc7 maxmemory \u503c\u65f6\uff0c\u518d\u6709\u5199\u8bf7\u6c42\u6765\u65f6\u8fd4\u56de\u9519\u8bef\u3002<\/li>\n<\/ul>\n
          \u524d\u7f00\u4e3avolatile-\u548callkeys-\u7684\u533a\u522b\u5728\u4e8e\u4e8c\u8005\u9009\u62e9\u8981\u6e05\u9664\u7684\u952e\u65f6\u7684\u5b57\u5178\u4e0d\u540c\uff0cvolatile-\u524d\u7f00\u7684\u7b56\u7565\u4ee3\u8868\u4eceredisDb\u4e2d\u7684expire\u5b57\u5178\u4e2d\u9009\u62e9\u952e\u8fdb\u884c\u6e05\u9664\uff1ballkeys-\u5f00\u5934\u7684\u7b56\u7565\u4ee3\u8868\u4ecedict\u5b57\u5178\u4e2d\u9009\u62e9\u952e\u8fdb\u884c\u6e05\u9664\u3002
          \u5185\u5b58\u6dd8\u6c70\u7b97\u6cd5\u7684\u5177\u4f53\u5de5\u4f5c\u539f\u7406\u662f\uff1a<\/p>\n
            \n
          • \u5ba2\u6237\u7aef\u6267\u884c\u4e00\u6761\u65b0\u547d\u4ee4\uff0c\u5bfc\u81f4\u6570\u636e\u5e93\u9700\u8981\u589e\u52a0\u6570\u636e\uff08\u6bd4\u5982set key value\uff09<\/li>\n
          • Redis\u4f1a\u68c0\u67e5\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff0c\u5982\u679c\u5185\u5b58\u4f7f\u7528\u8d85\u8fc7 maxmemory\uff0c\u5c31\u4f1a\u6309\u7167\u5185\u5b58\u6dd8\u6c70\u7b56\u7565\u5220\u9664\u4e00\u4e9b key<\/li>\n
          • \u65b0\u7684\u547d\u4ee4\u6267\u884c\u6210\u529f<\/li>\n<\/ul>\n
            \u56db\u3001LRU<\/h2>\n
            4.1 LRU\u7b97\u6cd5<\/h3>\n
            LRU\u662fLeast Recently Used\u7684\u7f29\u5199\uff0c\u4e5f\u5c31\u662f\u8868\u793a\u6700\u8fd1\u5f88\u5c11\u4f7f\u7528\uff0c\u4e5f\u53ef\u4ee5\u7406\u89e3\u6210\u6700\u4e45\u6ca1\u6709\u4f7f\u7528\u3002\u4e5f\u5c31\u662f\u8bf4\u5f53\u5185\u5b58\u4e0d\u591f\u7684\u65f6\u5019\uff0c\u6bcf\u6b21\u6dfb\u52a0\u4e00\u6761\u6570\u636e\uff0c\u90fd\u9700\u8981\u629b\u5f03\u4e00\u6761\u6700\u4e45\u65f6\u95f4\u6ca1\u6709\u4f7f\u7528\u7684\u65e7\u6570\u636e\u3002\u6807\u51c6\u7684LRU\u7b97\u6cd5\u4e3a\u4e86\u964d\u4f4e\u67e5\u627e\u548c\u5220\u9664\u5143\u7d20\u7684\u65f6\u95f4\u590d\u6742\u5ea6\uff0c\u4e00\u822c\u91c7\u7528Hash\u8868\u548c\u53cc\u5411\u94fe\u8868\u7ed3\u5408\u7684\u6570\u636e\u7ed3\u6784\uff0chash\u8868\u53ef\u4ee5\u8d4b\u4e88\u94fe\u8868\u5feb\u901f\u67e5\u627e\u5230\u67d0\u4e2akey\u662f\u5426\u5b58\u5728\u94fe\u8868\u4e2d\uff0c\u540c\u65f6\u53ef\u4ee5\u5feb\u901f\u5220\u9664\u3001\u6dfb\u52a0\u8282\u70b9\uff0c\u5982\u4e0b\u56fe\u6240\u793a\u3002<\/p>\n
            <\/p>\n
            \u53cc\u5411\u94fe\u8868\u7684\u67e5\u627e\u65f6\u95f4\u590d\u6742\u5ea6\u662fO(n)\uff0c\u5220\u9664\u548c\u63d2\u5165\u662fO(1)\uff0c\u501f\u52a9HashMap\u7ed3\u6784\uff0c\u53ef\u4ee5\u4f7f\u5f97\u67e5\u627e\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u53d8\u6210O(1)\u3002
            Hash\u8868\u7528\u6765\u67e5\u8be2\u5728\u94fe\u8868\u4e2d\u7684\u6570\u636e\u4f4d\u7f6e\uff0c\u94fe\u8868\u8d1f\u8d23\u6570\u636e\u7684\u63d2\u5165\uff0c\u5f53\u65b0\u6570\u636e\u63d2\u5165\u5230\u94fe\u8868\u5934\u90e8\u65f6\u6709\u4e24\u79cd\u60c5\u51b5\u3002<\/p>\n
              \n
            • \u94fe\u8868\u6ee1\u4e86\uff0c\u628a\u94fe\u8868\u5c3e\u90e8\u7684\u6570\u636e\u4e22\u5f03\u6389\uff0c\u65b0\u52a0\u5165\u7684\u7f13\u5b58\u76f4\u63a5\u52a0\u5165\u5230\u94fe\u8868\u5934\u4e2d\u3002<\/li>\n
            • \u5f53\u94fe\u8868\u4e2d\u7684\u67d0\u4e2a\u7f13\u5b58\u88ab\u547d\u4e2d\u65f6\uff0c\u76f4\u63a5\u628a\u6570\u636e\u79fb\u5230\u94fe\u8868\u5934\u90e8\uff0c\u539f\u672c\u5728\u5934\u8282\u70b9\u7684\u7f13\u5b58\u5c31\u5411\u94fe\u8868\u5c3e\u90e8\u79fb\u52a8\u3002<\/li>\n<\/ul>\n
              \u8fd9\u6837\uff0c\u7ecf\u8fc7\u591a\u6b21Cache\u64cd\u4f5c\u4e4b\u540e\uff0c\u6700\u8fd1\u88ab\u547d\u4e2d\u7684\u7f13\u5b58\uff0c\u90fd\u4f1a\u5b58\u5728\u94fe\u8868\u5934\u90e8\u7684\u65b9\u5411\uff0c\u6ca1\u6709\u547d\u4e2d\u7684\uff0c\u90fd\u4f1a\u5728\u94fe\u8868\u5c3e\u90e8\u65b9\u5411\uff0c\u5f53\u9700\u8981\u66ff\u6362\u5185\u5bb9\u65f6\uff0c\u7531\u4e8e\u94fe\u8868\u5c3e\u90e8\u662f\u6700\u5c11\u88ab\u547d\u4e2d\u7684\uff0c\u6211\u4eec\u53ea\u9700\u8981\u6dd8\u6c70\u94fe\u8868\u5c3e\u90e8\u7684\u6570\u636e\u5373\u53ef\u3002
              java\u4ee3\u7801\u5b9e\u73b0\u7b80\u5355\u7684LRU\u7b97\u6cd5<\/p>\n
              import java.util.HashMap;\n\npublic class LRUCache {\n\n    private Node head;\n        private Node tail;\n\n        private final HashMap\n   \n     nodeHashMap;\n        private int capacity; \/\/\u5bb9\u91cf\n\n    public LRUCache(int capacity) {\n        this.capacity = capacity;\n        nodeHashMap=new HashMap();\n        tail=new Node();\n        head=new Node();\n        head.next=tail;\n        tail.prev=head;\n    }\n\n    \/\/\u79fb\u9664\u8282\u70b9\n    private void removeNode(Node node){\n        if(node==tail){\n            tail=tail.prev;\n            tail.next=null;\n        }else if(node==head){\n            head=head.next;\n            head.prev=null;\n        }else{\n            node.prev.next=node.next;\n            node.next.prev=node.prev;\n        }\n    }\n    private void addNodeToHead(Node node){\n        node.next=head.next;\n        head.next.prev=node;\n        node.prev=head;\n        head.next=node;\n    }\n\n    private void moveNodeToHead(Node node){\n        removeNode(node);\n        addNodeToHead(node);\n    }\n    public String get(String key){\n        Node node=nodeHashMap.get(key);\n        if(node==null){\n            return null;\n        }\n        \/\/\u5237\u65b0\u5f53\u524dkey\u7684\u4f4d\u7f6e\n        moveNodeToHead(node);\n        return node.value;\n    }\n    public void put(String key,String value){\n        Node node=nodeHashMap.get(key);\n        if(node==null){ \/\/\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5219\u6dfb\u52a0\u5230\u94fe\u8868\n            if(nodeHashMap.size()>=capacity){ \/\/\u5927\u4e8e\u5bb9\u91cf\uff0c\u5219\u9700\u8981\u79fb\u9664\u8001\u7684\u6570\u636e\n                removeNode(tail); \/\/\u79fb\u9664\u5c3e\u90e8\u8282\u70b9\uff08tail\u8282\u70b9\u662f\u5c5e\u4e8e\u8981\u88ab\u6dd8\u6c70\u6570\u636e\uff09\n                nodeHashMap.remove(tail.key); \/\/\u4ecehashmap\u4e2d\u79fb\u9664\n            }\n            node=new Node(key,value);\n            nodeHashMap.put(key,node);\n            addNodeToHead(node);\n        }else{\n            node.value=value;\n            moveNodeToHead(node);\n        }\n    }\n\n    class Node{\n        private String key;\n        private String value;\n        Node prev;\n        Node next;\n\n        public Node(){}\n\n        public Node(String key,String value){\n            this.key=key;\n            this.value=value;\n        }\n    }\n}\n\n   <\/pre>\n
              4.2 redis\u4e2d\u7684LRU\u7b97\u6cd5<\/h3>\n
              \u5b9e\u9645\u4e0a\uff0cRedis\u4f7f\u7528\u7684LRU\u7b97\u6cd5\u5176\u5b9e\u662f\u4e00\u79cd\u4e0d\u53ef\u9760\u7684LRU\u7b97\u6cd5\uff0c\u5b83\u5b9e\u9645\u6dd8\u6c70\u7684\u952e\u5e76\u4e0d\u4e00\u5b9a\u662f\u771f\u6b63\u6700\u5c11\u4f7f\u7528\u7684\u6570\u636e\uff0c\u5b83\u7684\u5de5\u4f5c\u673a\u5236\u662f\uff1a<\/p>\n
                \n
              • \u968f\u673a\u91c7\u96c6\u6dd8\u6c70\u7684key\uff0c\u6bcf\u6b21\u968f\u673a\u9009\u51fa5\u4e2akey<\/li>\n
              • \u7136\u540e\u6dd8\u6c70\u8fd95\u4e2akey\u4e2d\u6700\u5c11\u4f7f\u7528\u7684key<\/li>\n<\/ul>\n
                \u8fd95\u4e2akey\u662f\u9ed8\u8ba4\u7684\u4e2a\u6570\uff0c\u5177\u4f53\u7684\u6570\u503c\u53ef\u4ee5\u5728redis.conf\u4e2d\u914d\u7f6e<\/p>\n
                maxmemory-samples 5\n<\/pre>\n
                \u5f53\u8fd1\u4f3cLRU\u7b97\u6cd5\u53d6\u503c\u8d8a\u5927\u7684\u65f6\u5019\u5c31\u4f1a\u8d8a\u63a5\u8fd1\u771f\u5b9e\u7684LRU\u7b97\u6cd5\uff0c\u56e0\u4e3a\u53d6\u503c\u8d8a\u5927\u83b7\u53d6\u7684\u6570\u636e\u8d8a\u5b8c\u6574\uff0c\u6dd8\u6c70\u4e2d\u7684\u6570\u636e\u5c31\u66f4\u52a0\u63a5\u8fd1\u6700\u5c11\u4f7f\u7528\u7684\u6570\u636e\u3002\u8fd9\u91cc\u5176\u5b9e\u6d89\u53ca\u4e00\u4e2a\u6743\u8861\u95ee\u9898\uff0c\u5982\u679c\u9700\u8981\u5728\u6240\u6709\u7684\u6570\u636e\u4e2d\u641c\u7d22\u6700\u7b26\u5408\u6761\u4ef6\u7684\u6570\u636e\uff0c\u90a3\u4e48\u4e00\u5b9a\u4f1a\u589e\u52a0\u7cfb\u7edf\u7684\u5f00\u9500\uff0cRedis\u662f\u5355\u7ebf\u7a0b\u7684\uff0c\u6240\u4ee5\u8017\u65f6\u7684\u64cd\u4f5c\u4f1a\u8c28\u614e\u4e00\u4e9b\u3002\u4e3a\u4e86\u5728\u4e00\u5b9a\u6210\u672c\u5185\u5b9e\u73b0\u76f8\u5bf9\u7684LRU\uff0c\u65e9\u671f\u7684Redis\u7248\u672c\u662f\u57fa\u4e8e\u91c7\u6837\u7684LRU\uff0c\u4e5f\u5c31\u662f\u653e\u5f03\u4e86\u4ece\u6240\u6709\u6570\u636e\u4e2d\u641c\u7d22\u89e3\u6539\u4e3a\u91c7\u6837\u7a7a\u95f4\u641c\u7d22\u6700\u4f18\u89e3\u3002Redis3.0\u7248\u672c\u4e4b\u540e\uff0cRedis\u4f5c\u8005\u5bf9\u4e8e\u57fa\u4e8e\u91c7\u6837\u7684LRU\u8fdb\u884c\u4e86\u4e00\u4e9b\u4f18\u5316\uff1a<\/p>\n
                  \n
                • Redis\u4e2d\u7ef4\u62a4\u4e00\u4e2a\u5927\u5c0f\u4e3a16\u7684\u5019\u9009\u6c60\uff0c\u5f53\u7b2c\u4e00\u6b21\u968f\u673a\u9009\u53d6\u91c7\u7528\u6570\u636e\u65f6\uff0c\u4f1a\u628a\u6570\u636e\u653e\u5165\u5230\u5019\u9009\u6c60\u4e2d\uff0c\u5e76\u4e14\u5019\u9009\u6c60\u4e2d\u7684\u6570\u636e\u4f1a\u6839\u636ekey\u7684\u7a7a\u95f2\u65f6\u95f4\u8fdb\u884c\u6392\u5e8f\u3002<\/li>\n
                • \u5f53\u7b2c\u4e8c\u6b21\u4ee5\u540e\u9009\u53d6\u6570\u636e\u65f6\uff0c\u53ea\u6709\u5927\u4e8e\u5019\u9009\u6c60\u5185\u6700\u5c0f\u7a7a\u95f2\u65f6\u95f4\u7684key\u624d\u4f1a\u88ab\u653e\u8fdb\u5019\u9009\u6c60\u3002<\/li>\n
                • \u5f53\u5019\u9009\u6c60\u7684\u6570\u636e\u6ee1\u4e86\u4e4b\u540e\uff0c\u90a3\u4e48\u7a7a\u95f2\u65f6\u95f4\u6700\u5927\u7684key\u5c31\u4f1a\u88ab\u6324\u51fa\u5019\u9009\u6c60\u3002\u5f53\u6267\u884c\u6dd8\u6c70\u65f6\uff0c\u76f4\u63a5\u4ece\u5019\u9009\u6c60\u4e2d\u9009\u53d6\u7a7a\u95f2\u65f6\u95f4\u6700\u5927\u7684key\u8fdb\u884c\u6dd8\u6c70\u3002<\/li>\n<\/ul>\n
                  \u5982\u4e0b\u56fe\u6240\u793a\uff0c\u9996\u5148\u4ece\u76ee\u6807\u5b57\u5178\u4e2d\u91c7\u96c6\u51famaxmemory-samples\u4e2a\u952e\uff0c\u7f13\u5b58\u5728\u4e00\u4e2asamples\u6570\u7ec4\u4e2d\uff0c\u7136\u540e\u4ecesamples\u6570\u7ec4\u4e2d\u4e00\u4e2a\u4e2a\u53d6\u51fa\u6765\uff0c\u548c\u56de\u6536\u6c60\u4e2d\u7684\u952e\u8fdb\u884c\u952e\u7684\u7a7a\u95f2\u65f6\u95f4\u6bd4\u8f83\uff0c\u4ece\u800c\u66f4\u65b0\u56de\u6536\u6c60\u3002\u5728\u66f4\u65b0\u8fc7\u7a0b\u4e2d\uff0c\u9996\u5148\u5229\u7528\u904d\u5386\u627e\u5230\u7684\u6bcf\u4e2a\u952e\u7684\u5b9e\u9645\u63d2\u5165\u4f4d\u7f6ex\uff0c\u7136\u540e\u6839\u636e\u4e0d\u540c\u60c5\u51b5\u8fdb\u884c\u5904\u7406\u3002<\/p>\n
                  <\/p>\n
                    \n
                  • \u56de\u6536\u6c60\u6ee1\u4e86\uff0c\u5e76\u4e14\u5f53\u524d\u63d2\u5165\u7684key\u7684\u7a7a\u95f2\u65f6\u95f4\u6700\u5c0f\uff08\u4e5f\u5c31\u662f\u56de\u6536\u6c60\u4e2d\u7684\u6240\u6709key\u90fd\u6bd4\u5f53\u524d\u63d2\u5165\u7684key\u7684\u7a7a\u95f2\u65f6\u95f4\u90fd\u8981\u5927\uff09\uff0c\u5219\u4e0d\u4f5c\u4efb\u4f55\u64cd\u4f5c\u3002<\/li>\n
                  • \u56de\u6536\u6c60\u672a\u6ee1\uff0c\u5e76\u4e14\u63d2\u5165\u7684\u4f4d\u7f6ex\u6ca1\u6709\u952e\uff0c\u5219\u76f4\u63a5\u63d2\u5165\u5373\u53ef<\/li>\n
                  • \u56de\u6536\u6c60\u672a\u6ee1\uff0c\u4e14\u63d2\u5165\u7684\u4f4d\u7f6ex\u539f\u672c\u5df2\u7ecf\u5b58\u5728\u8981\u6dd8\u6c70\u7684\u952e\uff0c\u5219\u628a\u7b2cx\u4e2a\u4ee5\u540e\u7684\u5143\u7d20\u90fd\u5f80\u540e\u632a\u4e00\u4e2a\u4f4d\u7f6e\uff0c\u7136\u540e\u518d\u6267\u884c\u63d2\u5165\u64cd\u4f5c\u3002<\/li>\n
                  • \u56de\u6536\u6c60\u6ee1\u4e86\uff0c\u5c06\u5f53\u524d\u7b2cx\u4e2a\u4ee5\u524d\u7684\u5143\u7d20\u5f80\u524d\u632a\u4e00\u4e2a\u4f4d\u7f6e\uff08\u5b9e\u9645\u5c31\u662f\u6dd8\u6c70\u4e86\uff09\uff0c\u7136\u540e\u6267\u884c\u63d2\u5165\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n
                    \u8fd9\u6837\u505a\u7684\u76ee\u7684\u662f\u80fd\u591f\u9009\u51fa\u6700\u771f\u5b9e\u7684\u6700\u5c11\u88ab\u8bbf\u95ee\u7684key\uff0c\u80fd\u591f\u6b63\u786e\u9009\u62e9\u4e0d\u5e38\u4f7f\u7528\u7684key\u3002\u56e0\u4e3a\u5728Redis3.0\u4e4b\u524d\u662f\u968f\u673a\u9009\u53d6\u6837\u672c\uff0c\u8fd9\u6837\u7684\u65b9\u5f0f\u5f88\u6709\u53ef\u80fd\u4e0d\u662f\u771f\u6b63\u610f\u4e49\u4e0a\u7684\u6700\u5c11\u8bbf\u95ee\u7684key\u3002LRU\u7b97\u6cd5\u6709\u4e00\u4e2a\u5f0a\u7aef\uff0c\u5047\u5982\u4e00\u4e2akey\u503c\u8bbf\u95ee\u9891\u7387\u5f88\u4f4e\uff0c\u4f46\u662f\u6700\u8fd1\u4e00\u6b21\u88ab\u8bbf\u95ee\u5230\u4e86\uff0c\u90a3LRU\u4f1a\u8ba4\u4e3a\u5b83\u662f\u70ed\u70b9\u6570\u636e\uff0c\u4e0d\u4f1a\u88ab\u6dd8\u6c70\u3002\u540c\u6837\uff0c\u7ecf\u5e38\u88ab\u8bbf\u95ee\u7684\u6570\u636e\uff0c\u6700\u8fd1\u4e00\u6bb5\u65f6\u95f4\u6ca1\u6709\u88ab\u8bbf\u95ee\uff0c\u8fd9\u6837\u4f1a\u5bfc\u81f4\u8fd9\u4e9b\u6570\u636e\u88ab\u6dd8\u6c70\u6389\uff0c\u5bfc\u81f4\u8bef\u5224\u800c\u6dd8\u6c70\u6389\u70ed\u70b9\u6570\u636e\uff0c\u4e8e\u662f\u5728Redis 4.0\u4e2d\uff0c\u65b0\u52a0\u4e86\u4e00\u79cdLFU\u7b97\u6cd5\u3002<\/p>\n
                    \u4e94\u3001LFU<\/h2>\n
                    LFU\uff08Least Frequently Used\uff09\uff0c\u8868\u793a\u6700\u8fd1\u6700\u5c11\u4f7f\u7528\uff0c\u5b83\u548ckey\u7684\u4f7f\u7528\u6b21\u6570\u6709\u5173\uff0c\u5176\u601d\u60f3\u662f\uff1a\u6839\u636ekey\u6700\u8fd1\u88ab\u8bbf\u95ee\u7684\u9891\u7387\u8fdb\u884c\u6dd8\u6c70\uff0c\u6bd4\u8f83\u5c11\u8bbf\u95ee\u7684key\u4f18\u5148\u6dd8\u6c70\uff0c\u53cd\u4e4b\u5219\u4fdd\u7559\u3002LFU\u7684\u539f\u7406\u662f\u4f7f\u7528\u8ba1\u6570\u5668\u6765\u5bf9key\u8fdb\u884c\u6392\u5e8f\uff0c\u6bcf\u6b21key\u88ab\u8bbf\u95ee\u65f6\uff0c\u8ba1\u6570\u5668\u4f1a\u589e\u5927\uff0c\u5f53\u8ba1\u6570\u5668\u8d8a\u5927\uff0c\u610f\u5473\u7740\u5f53\u524dkey\u7684\u8bbf\u95ee\u8d8a\u9891\u7e41\uff0c\u4e5f\u5c31\u662f\u610f\u5473\u7740\u5b83\u662f\u70ed\u70b9\u6570\u636e\u3002 \u5b83\u5f88\u597d\u7684\u89e3\u51b3\u4e86LRU\u7b97\u6cd5\u7684\u7f3a\u9677\uff1a\u4e00\u4e2a\u5f88\u4e45\u6ca1\u6709\u88ab\u8bbf\u95ee\u7684key\uff0c\u5076\u5c14\u88ab\u8bbf\u95ee\u4e00\u6b21\uff0c\u5bfc\u81f4\u88ab\u8bef\u8ba4\u4e3a\u662f\u70ed\u70b9\u6570\u636e\u7684\u95ee\u9898\u3002LFU\u7684\u5b9e\u73b0\u539f\u7406\u5982\u4e0b\u56fe\u6240\u793a\uff0cLFU\u7ef4\u62a4\u4e86\u4e24\u4e2a\u94fe\u8868\uff0c\u6a2a\u5411\u7ec4\u6210\u7684\u94fe\u8868\u7528\u6765\u5b58\u50a8\u8bbf\u95ee\u9891\u7387\uff0c\u6bcf\u4e2a\u8bbf\u95ee\u9891\u7387\u7684\u8282\u70b9\u4e0b\u5b58\u50a8\u53e6\u5916\u4e00\u4e2a\u5177\u6709\u76f8\u540c\u8bbf\u95ee\u9891\u7387\u7684\u7f13\u5b58\u6570\u636e\u3002\u5177\u4f53\u7684\u5de5\u4f5c\u539f\u7406\u662f\uff1a<\/p>\n
                      \n
                    • \u5f53\u6dfb\u52a0\u5143\u7d20\u65f6\uff0c\u627e\u5230\u76f8\u540c\u8bbf\u95ee\u9891\u6b21\u7684\u8282\u70b9\uff0c\u7136\u540e\u6dfb\u52a0\u5230\u8be5\u8282\u70b9\u7684\u6570\u636e\u94fe\u8868\u7684\u5934\u90e8\u3002\u5982\u679c\u8be5\u6570\u636e\u94fe\u8868\u6ee1\u4e86\uff0c\u5219\u79fb\u9664\u94fe\u8868\u5c3e\u90e8\u7684\u8282\u70b9<\/li>\n
                    • \u5f53\u83b7\u53d6\u5143\u7d20\u6216\u8005\u4fee\u6539\u5143\u7d20\u65f6\uff0c\u90fd\u4f1a\u589e\u52a0\u5bf9\u5e94key\u7684\u8bbf\u95ee\u9891\u6b21\uff0c\u5e76\u628a\u5f53\u524d\u8282\u70b9\u79fb\u52a8\u5230\u4e0b\u4e00\u4e2a\u9891\u6b21\u8282\u70b9<\/li>\n<\/ul>\n
                      \u6dfb\u52a0\u5143\u7d20\u65f6\uff0c\u8bbf\u95ee\u9891\u7387\u9ed8\u8ba4\u4e3a1\uff0c\u968f\u7740\u8bbf\u95ee\u6b21\u6570\u7684\u589e\u52a0\uff0c\u9891\u7387\u4e0d\u65ad\u9012\u589e\u3002\u800c\u5f53\u524d\u88ab\u8bbf\u95ee\u7684\u5143\u7d20\u4e5f\u4f1a\u968f\u7740\u9891\u7387\u589e\u52a0\u8fdb\u884c\u79fb\u52a8\u3002<\/p>\n
                      <\/p>\n
                       \u5230\u6b64\u8fd9\u7bc7\u5173\u4e8e\u6df1\u5165\u7406\u89e3Redis\u5185\u5b58\u6dd8\u6c70\u7b56\u7565\u7684\u6587\u7ae0\u5c31\u4ecb\u7ecd\u5230\u8fd9\u4e86,\u66f4\u591a\u76f8\u5173Redis\u5185\u5b58\u6dd8\u6c70\u5185\u5bb9\u8bf7\u641c\u7d22golang\u5b66\u4e60\u7f51\u4ee5\u524d\u7684\u6587\u7ae0\u6216\u7ee7\u7eed\u6d4f\u89c8\u4e0b\u9762\u7684\u76f8\u5173\u6587\u7ae0\u5e0c\u671b\u5927\u5bb6\u4ee5\u540e\u591a\u591a\u652f\u6301golang\u5b66\u4e60\u7f51\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
                      \u6df1\u5165\u7406\u89e3Redis\u5185\u5b58\u6dd8\u6c70\u7b56\u7565 ...<\/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-201229","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201229","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=201229"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201229\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201229"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201229"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201229"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}