{"id":48512,"date":"2025-07-30T12:22:12","date_gmt":"2025-07-30T04:22:12","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/48512.html"},"modified":"2025-07-30T12:22:12","modified_gmt":"2025-07-30T04:22:12","slug":"redis%e6%95%b0%e6%8d%ae%e6%b7%98%e6%b1%b0%e7%ad%96%e7%95%a5%e8%af%a6%e8%a7%a3%ef%bc%9a%e4%bb%8e%e5%8e%9f%e7%90%86%e5%88%b0%e5%ae%9e%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/48512.html","title":{"rendered":"Redis\u6570\u636e\u6dd8\u6c70\u7b56\u7565\u8be6\u89e3\uff1a\u4ece\u539f\u7406\u5230\u5b9e\u8df5"},"content":{"rendered":"

Redis\u6570\u636e\u6dd8\u6c70\u7b56\u7565\u8be6\u89e3：\u4ece\u539f\u7406\u5230\u5b9e\u8df5<\/h2>\n

\u5728\u4f7f\u7528Redis\u7684\u8fc7\u7a0b\u4e2d，\u4f60\u662f\u5426\u9047\u5230\u8fc7\u8fd9\u6837\u7684\u60c5\u51b5：\u660e\u660e\u914d\u7f6e\u4e86\u6700\u5927\u5185\u5b58\u9650\u5236，\u5374\u7a81\u7136\u6536\u5230\u201cOOM command not allowed when used memory > \u2018maxmemory\u2019\u201d\u7684\u9519\u8bef？\u8fd9\u5f88\u53ef\u80fd\u662fRedis\u6570\u636e\u6dd8\u6c70\u7b56\u7565\u6ca1\u6709\u6b63\u786e\u914d\u7f6e\u5bfc\u81f4\u7684\u3002\u4f5c\u4e3a\u9ad8\u6027\u80fd\u7684\u5185\u5b58\u6570\u636e\u5e93，Redis\u7684\u5185\u5b58\u7ba1\u7406\u81f3\u5173\u91cd\u8981，\u800c\u6570\u636e\u6dd8\u6c70\u7b56\u7565\u6b63\u662f\u5185\u5b58\u7ba1\u7406\u7684\u6838\u5fc3\u673a\u5236\u4e4b\u4e00\u3002\u672c\u6587\u5c06\u4ece\u539f\u7406\u3001\u5206\u7c7b\u3001\u914d\u7f6e\u5230\u5b9e\u8df5\u5efa\u8bae，\u5168\u9762\u89e3\u8bfbRedis\u7684\u6570\u636e\u6dd8\u6c70\u7b56\u7565\u3002<\/p>\n

\u4e00\u3001\u4e3a\u4ec0\u4e48\u9700\u8981\u6570\u636e\u6dd8\u6c70\u7b56\u7565？<\/h3>\n

Redis\u662f\u57fa\u4e8e\u5185\u5b58\u7684\u6570\u636e\u5e93，\u800c\u5185\u5b58\u8d44\u6e90\u662f\u6709\u9650\u7684\u3002\u5f53\u6211\u4eec\u901a\u8fc7maxmemory\u914d\u7f6e（\u5355\u4f4d：\u5b57\u8282）\u8bbe\u5b9a\u4e86Redis\u7684\u6700\u5927\u53ef\u7528\u5185\u5b58\u540e，\u968f\u7740\u6570\u636e\u4e0d\u65ad\u5199\u5165，\u603b\u6709\u4e00\u5929\u4f1a\u8fbe\u5230\u8fd9\u4e2a\u5185\u5b58\u4e0a\u9650\u3002\u6b64\u65f6\u5982\u679c\u518d\u6709\u65b0\u6570\u636e\u5199\u5165，Redis\u5c31\u5fc5\u987b\u51b3\u5b9a：\u662f\u62d2\u7edd\u5199\u5165\u8bf7\u6c42，\u8fd8\u662f\u5220\u9664\u90e8\u5206\u65e7\u6570\u636e\u817e\u51fa\u7a7a\u95f4\u3002<\/p>\n

\u6570\u636e\u6dd8\u6c70\u7b56\u7565（Maxmemory Policy）\u5c31\u662f\u7528\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u7684\u89c4\u5219\u2014\u2014\u5b83\u5b9a\u4e49\u4e86Redis\u5728\u5185\u5b58\u6ee1\u65f6，\u5e94\u8be5\u4f18\u5148\u5220\u9664\u54ea\u4e9b\u6570\u636e，\u4ee5\u4fdd\u8bc1\u65b0\u6570\u636e\u80fd\u6b63\u5e38\u5199\u5165\u3002<\/p>\n

\u5982\u679c\u672a\u914d\u7f6e\u6dd8\u6c70\u7b56\u7565（\u6216\u7b56\u7565\u4e3anoeviction），\u5f53\u5185\u5b58\u6ee1\u65f6Redis\u4f1a\u62d2\u7edd\u6240\u6709\u5199\u64cd\u4f5c（\u8bfb\u64cd\u4f5c\u4e0d\u53d7\u5f71\u54cd），\u8fd9\u4e5f\u662f\u5f00\u5934\u63d0\u5230\u7684OOM\u9519\u8bef\u7684\u5e38\u89c1\u539f\u56e0\u3002<\/p>\n

\u4e8c\u3001Redis\u6570\u636e\u6dd8\u6c70\u7b56\u7565\u7684\u5206\u7c7b<\/h3>\n

Redis\u7684\u6dd8\u6c70\u7b56\u7565\u53ef\u4ee5\u6309\u7167\u201c\u6dd8\u6c70\u8303\u56f4\u201d\u548c\u201c\u6dd8\u6c70\u89c4\u5219\u201d\u5206\u4e3a\u4e24\u5927\u7c7b，\u76ee\u524d（Redis 6.2\u53ca\u4ee5\u4e0a\u7248\u672c）\u5171\u67098\u79cd\u7b56\u7565，\u6211\u4eec\u9010\u4e00\u89e3\u6790\u3002<\/p>\n

（\u4e00）\u6309\u201c\u6dd8\u6c70\u8303\u56f4\u201d\u5212\u5206：\u662f\u5426\u9650\u5236\u6dd8\u6c70\u6570\u636e\u7684\u7c7b\u578b<\/h4>\n
  • \u5168\u5c40\u6dd8\u6c70：\u4eceRedis\u6240\u6709\u6570\u636e\u4e2d\u9009\u62e9\u8981\u6dd8\u6c70\u7684\u5bf9\u8c61（\u5305\u62ec\u6240\u6709\u6570\u636e\u5e93\u7684\u952e，\u4ee5\u53ca\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u548c\u672a\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684\u6570\u636e）\u3002<\/li>\n
  • \u8fc7\u671f\u952e\u6dd8\u6c70：\u4ec5\u4ece\u201c\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u4e14\u5df2\u8fc7\u671f\u201d\u6216\u201c\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4（\u65e0\u8bba\u662f\u5426\u8fc7\u671f）\u201d\u7684\u6570\u636e\u4e2d\u9009\u62e9\u6dd8\u6c70\u5bf9\u8c61\u3002<\/li>\n

    （\u4e8c）8\u79cd\u6838\u5fc3\u6dd8\u6c70\u7b56\u7565\u53ca\u539f\u7406<\/h4>\n

    \u6839\u636e\u5b98\u65b9\u6587\u6863，8\u79cd\u7b56\u7565\u7684\u4f5c\u7528\u548c\u9002\u7528\u573a\u666f\u5982\u4e0b：<\/p>\n\n\u7b56\u7565\u540d\u79f0\u6dd8\u6c70\u8303\u56f4\u6dd8\u6c70\u89c4\u5219\u9002\u7528\u573a\u666f<\/tr>\n\n\n\n\n\n\n\n\n\n
    noeviction<\/td>\n–<\/td>\n\u4e0d\u6dd8\u6c70\u4efb\u4f55\u6570\u636e，\u62d2\u7edd\u65b0\u5199\u64cd\u4f5c<\/td>\n\u4e0d\u5141\u8bb8\u6570\u636e\u4e22\u5931\u7684\u573a\u666f（\u5982\u6838\u5fc3\u914d\u7f6e\u5b58\u50a8）<\/td>\n<\/tr>\n
    allkeys-lru<\/td>\n\u5168\u5c40（\u6240\u6709\u952e）<\/td>\n\u6dd8\u6c70\u6700\u8fd1\u6700\u5c11\u88ab\u8bbf\u95ee（LRU）\u7684\u952e<\/td>\n\u70ed\u70b9\u6570\u636e\u96c6\u4e2d，\u9700\u4fdd\u7559\u5e38\u8bbf\u95ee\u6570\u636e（\u5982\u7f13\u5b58）<\/td>\n<\/tr>\n
    allkeys-lfu<\/td>\n\u5168\u5c40（\u6240\u6709\u952e）<\/td>\n\u6dd8\u6c70\u6700\u8fd1\u6700\u5c11\u88ab\u4f7f\u7528（LFU）\u7684\u952e<\/td>\n\u957f\u671f\u8fd0\u884c\u4e2d，\u9700\u8fc7\u6ee4\u5076\u53d1\u8bbf\u95ee\u7684\u201c\u4e00\u6b21\u6027\u6570\u636e\u201d<\/td>\n<\/tr>\n
    allkeys-random<\/td>\n\u5168\u5c40（\u6240\u6709\u952e）<\/td>\n\u968f\u673a\u6dd8\u6c70\u4efb\u610f\u952e<\/td>\n\u8bbf\u95ee\u6a21\u5f0f\u5747\u5300，\u65e0\u660e\u663e\u70ed\u70b9\u6570\u636e<\/td>\n<\/tr>\n
    volatile-lru<\/td>\n\u4ec5\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684\u952e<\/td>\n\u4ece\u8fc7\u671f\u952e\u4e2d\u6dd8\u6c70\u6700\u8fd1\u6700\u5c11\u88ab\u8bbf\u95ee（LRU）\u7684\u952e<\/td>\n\u9700\u4fdd\u7559\u672a\u8fc7\u671f\u6570\u636e，\u8fc7\u671f\u952e\u6309\u8bbf\u95ee\u9891\u7387\u6dd8\u6c70<\/td>\n<\/tr>\n
    volatile-lfu<\/td>\n\u4ec5\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684\u952e<\/td>\n\u4ece\u8fc7\u671f\u952e\u4e2d\u6dd8\u6c70\u6700\u8fd1\u6700\u5c11\u88ab\u4f7f\u7528（LFU）\u7684\u952e<\/td>\n\u8fc7\u671f\u952e\u4e2d\u9700\u4fdd\u7559\u9ad8\u9891\u8bbf\u95ee\u6570\u636e<\/td>\n<\/tr>\n
    volatile-random<\/td>\n\u4ec5\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684\u952e<\/td>\n\u4ece\u8fc7\u671f\u952e\u4e2d\u968f\u673a\u6dd8\u6c70<\/td>\n\u8fc7\u671f\u952e\u6570\u91cf\u591a，\u4e14\u8bbf\u95ee\u5206\u5e03\u5747\u5300<\/td>\n<\/tr>\n
    volatile-ttl<\/td>\n\u4ec5\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684\u952e<\/td>\n\u4ece\u8fc7\u671f\u952e\u4e2d\u6dd8\u6c70\u5269\u4f59\u751f\u5b58\u65f6\u95f4（TTL）\u6700\u77ed\u7684\u952e<\/td>\n\u9700\u4f18\u5148\u6dd8\u6c70\u5373\u5c06\u8fc7\u671f\u7684\u6570\u636e（\u5982\u5b9a\u65f6\u4efb\u52a1\u6570\u636e）<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \u5173\u952e\u6982\u5ff5\u8865\u5145：LRU\u548cLFU\u7684\u533a\u522b<\/h5>\n

    \u4e0a\u9762\u63d0\u5230\u7684LRU\u548cLFU\u662f\u4e24\u79cd\u7ecf\u5178\u7684\u7f13\u5b58\u6dd8\u6c70\u7b97\u6cd5，\u5bb9\u6613\u6df7\u6dc6，\u8fd9\u91cc\u91cd\u70b9\u533a\u5206：<\/p>\n

      \n
    • \n

      LRU（Least Recently Used）：\u6700\u8fd1\u6700\u5c11\u88ab\u8bbf\u95ee
      \n\u57fa\u4e8e\u201c\u8bbf\u95ee\u65f6\u95f4\u201d\u5224\u65ad：\u5982\u679c\u4e00\u4e2a\u6570\u636e\u5f88\u4e45\u6ca1\u88ab\u8bbf\u95ee，\u5c31\u8ba4\u4e3a\u5b83\u672a\u6765\u88ab\u8bbf\u95ee\u7684\u6982\u7387\u4f4e，\u4f18\u5148\u6dd8\u6c70\u3002
      \n\u4e3e\u4f8b：A\u952e1\u5c0f\u65f6\u524d\u88ab\u8bbf\u95ee，B\u952e10\u5206\u949f\u524d\u88ab\u8bbf\u95ee，\u5219LRU\u4f1a\u6dd8\u6c70A\u952e\u3002<\/p>\n<\/li>\n

    • \n

      LFU（Least Frequently Used）：\u6700\u8fd1\u6700\u5c11\u88ab\u4f7f\u7528
      \n\u57fa\u4e8e\u201c\u8bbf\u95ee\u9891\u7387\u201d\u5224\u65ad：\u5982\u679c\u4e00\u4e2a\u6570\u636e\u5728\u6700\u8fd1\u4e00\u6bb5\u65f6\u95f4\u5185\u88ab\u8bbf\u95ee\u7684\u6b21\u6570\u5c11，\u5c31\u8ba4\u4e3a\u5b83\u672a\u6765\u88ab\u8bbf\u95ee\u7684\u6982\u7387\u4f4e，\u4f18\u5148\u6dd8\u6c70\u3002
      \n\u4e3e\u4f8b：A\u952e1\u5c0f\u65f6\u5185\u88ab\u8bbf\u95ee1\u6b21，B\u952e1\u5c0f\u65f6\u5185\u88ab\u8bbf\u95ee10\u6b21，\u5219LFU\u4f1a\u6dd8\u6c70A\u952e\u3002<\/p>\n<\/li>\n<\/ul>\n

      \u4e24\u8005\u7684\u6838\u5fc3\u5dee\u5f02：LRU\u5173\u6ce8\u201c\u65f6\u6548\u6027\u201d（\u662f\u5426\u6700\u8fd1\u88ab\u8bbf\u95ee），LFU\u5173\u6ce8\u201c\u70ed\u5ea6\u201d（\u8bbf\u95ee\u9891\u7387）\u3002\u4f8b\u5982，\u4e00\u4e2a\u6570\u636e\u534a\u5e74\u524d\u88ab\u9891\u7e41\u8bbf\u95ee（\u9ad8\u9891\u7387），\u4f46\u6700\u8fd11\u4e2a\u6708\u6ca1\u88ab\u8bbf\u95ee（\u975e\u6700\u8fd1），LRU\u4f1a\u6dd8\u6c70\u5b83，\u800cLFU\u53ef\u80fd\u4fdd\u7559\u5b83\u3002<\/p>\n

      \u4e09\u3001\u5982\u4f55\u914d\u7f6e\u548c\u67e5\u770b\u6dd8\u6c70\u7b56\u7565？<\/h3>\n

      （\u4e00）\u914d\u7f6e\u65b9\u6cd5<\/h4>\n
    • \n

      \u914d\u7f6e\u6587\u4ef6（redis.conf）：
      \n\u901a\u8fc7maxmemory-policy\u6307\u5b9a\u7b56\u7565，\u4f8b\u5982：<\/p>\n

      maxmemory 1073741824 # \u6700\u5927\u5185\u5b581GB（1024*1024*1024）
      \nmaxmemory-policy allkeys-lru # \u5168\u5c40LRU\u6dd8\u6c70<\/p>\n<\/li>\n

    • \n

      \u52a8\u6001\u914d\u7f6e（\u8fd0\u884c\u65f6\u751f\u6548）：
      \n\u4f7f\u7528config set\u547d\u4ee4\u5b9e\u65f6\u4fee\u6539，\u65e0\u9700\u91cd\u542fRedis：<\/p>\n

      # \u8bbe\u7f6e\u6700\u5927\u5185\u5b58\u4e3a1GB<\/span>
      \n127.0<\/span>.0.1:6379<\/span>><\/span> config set<\/span> maxmemory 1073741824<\/span>
      \n# \u8bbe\u7f6e\u6dd8\u6c70\u7b56\u7565\u4e3aallkeys-lru<\/span>
      \n127.0<\/span>.0.1:6379<\/span>><\/span> config set<\/span> maxmemory-policy allkeys-lru<\/p>\n

      \u52a8\u6001\u914d\u7f6e\u7684\u4f18\u70b9\u662f\u53ef\u4ee5\u6839\u636e\u4e1a\u52a1\u6ce2\u52a8\u4e34\u65f6\u8c03\u6574（\u5982\u7535\u5546\u5927\u4fc3\u65f6\u5207\u6362\u7b56\u7565），\u4f46\u9700\u6ce8\u610f：\u91cd\u542fRedis\u540e\u4f1a\u6062\u590d\u4e3a\u914d\u7f6e\u6587\u4ef6\u4e2d\u7684\u503c\u3002<\/p>\n<\/li>\n

      （\u4e8c）\u67e5\u770b\u5f53\u524d\u7b56\u7565<\/h4>\n

      \u4f7f\u7528config get\u547d\u4ee4\u67e5\u770b\u5f53\u524d\u914d\u7f6e：<\/p>\n

      # \u67e5\u770b\u6700\u5927\u5185\u5b58\u548c\u6dd8\u6c70\u7b56\u7565<\/span>
      \n127.0<\/span>.0.1:6379<\/span>><\/span> config get maxmemory
      \n1<\/span>)<\/span> "maxmemory"<\/span>
      \n2<\/span>)<\/span> "1073741824"<\/span><\/p>\n

      127.0<\/span>.0.1:6379<\/span>><\/span> config get maxmemory-policy
      \n1<\/span>)<\/span> "maxmemory-policy"<\/span>
      \n2<\/span>)<\/span> "allkeys-lru"<\/span><\/p>\n

      \u56db\u3001\u6dd8\u6c70\u7b56\u7565\u7684\u5e95\u5c42\u5b9e\u73b0：\u8fd1\u4f3c\u7b97\u6cd5\u7684\u53d6\u820d<\/h3>\n

      \u4f60\u53ef\u80fd\u4f1a\u6709\u7591\u95ee：LRU\u9700\u8981\u8bb0\u5f55\u6bcf\u4e2a\u952e\u7684\u8bbf\u95ee\u65f6\u95f4，\u5f53\u6570\u636e\u91cf\u5f88\u5927\u65f6（\u5982\u767e\u4e07\u7ea7\u952e），\u8ba1\u7b97\u201c\u6700\u8fd1\u6700\u5c11\u8bbf\u95ee\u201d\u4f1a\u4e0d\u4f1a\u5f88\u8017\u65f6？<\/p>\n

      \u5b9e\u9645\u4e0a，Redis\u7684LRU\u548cLFU\u5e76\u975e\u201c\u4e25\u683c\u7cbe\u786e\u201d\u7684\u5b9e\u73b0，\u800c\u662f\u8fd1\u4f3c\u7b97\u6cd5\u2014\u2014\u901a\u8fc7\u968f\u673a\u91c7\u6837（\u9ed8\u8ba4\u91c7\u68375\u4e2a\u952e，\u53ef\u901a\u8fc7maxmemory-samples\u914d\u7f6e），\u4ece\u91c7\u6837\u7ed3\u679c\u4e2d\u9009\u62e9\u6700\u7b26\u5408\u6dd8\u6c70\u89c4\u5219\u7684\u952e\u3002<\/p>\n

      \u8fd9\u6837\u505a\u7684\u539f\u56e0\u662f\u5e73\u8861\u6027\u80fd\u548c\u7cbe\u5ea6：\u4e25\u683c\u7684LRU\u9700\u8981\u7ef4\u62a4\u6709\u5e8f\u94fe\u8868，\u6bcf\u6b21\u8bbf\u95ee\u90fd\u8981\u8c03\u6574\u4f4d\u7f6e，\u4f1a\u6d88\u8017\u5927\u91cfCPU；\u800c\u8fd1\u4f3c\u7b97\u6cd5\u901a\u8fc7\u5c11\u91cf\u91c7\u6837\u5c31\u80fd\u8fbe\u5230\u63a5\u8fd1\u7684\u6548\u679c，\u4e14\u6027\u80fd\u635f\u8017\u6781\u4f4e\u3002<\/p>\n

      \u5982\u679c\u5bf9\u7cbe\u5ea6\u6709\u66f4\u9ad8\u8981\u6c42，\u53ef\u4ee5\u901a\u8fc7config set maxmemory-samples 10\u63d0\u9ad8\u91c7\u6837\u6570\u91cf（\u53d6\u503c\u8303\u56f43-10），\u4f46\u9700\u6ce8\u610f：\u91c7\u6837\u6570\u8d8a\u591a，CPU\u6d88\u8017\u8d8a\u5927\u3002<\/p>\n

      \u4e94\u3001\u5b9e\u8df5\u5efa\u8bae：\u5982\u4f55\u9009\u62e9\u9002\u5408\u7684\u6dd8\u6c70\u7b56\u7565？<\/h3>\n

      \u9009\u62e9\u6dd8\u6c70\u7b56\u7565\u7684\u6838\u5fc3\u539f\u5219\u662f：\u8ba9Redis\u4fdd\u7559\u201c\u6700\u6709\u4ef7\u503c\u201d\u7684\u6570\u636e，\u800c\u201c\u4ef7\u503c\u201d\u7531\u4e1a\u52a1\u573a\u666f\u51b3\u5b9a\u3002\u4ee5\u4e0b\u662f\u5e38\u89c1\u573a\u666f\u7684\u9009\u62e9\u5efa\u8bae：<\/p>\n

      1. \u7f13\u5b58\u573a\u666f（\u6700\u5e38\u7528）<\/h4>\n

      \u7f13\u5b58\u7684\u6838\u5fc3\u9700\u6c42\u662f\u201c\u4fdd\u7559\u70ed\u70b9\u6570\u636e，\u6dd8\u6c70\u51b7\u6570\u636e\u201d，\u63a8\u8350\u4f18\u5148\u4f7f\u7528：<\/p>\n

        \n
      • allkeys-lru：\u5982\u679c\u6240\u6709\u6570\u636e\u7684\u8bbf\u95ee\u9891\u7387\u5dee\u5f02\u660e\u663e（\u5982\u5546\u54c1\u8be6\u60c5\u7f13\u5b58，\u70ed\u95e8\u5546\u54c1\u8bbf\u95ee\u9891\u7e41），LRU\u80fd\u6709\u6548\u4fdd\u7559\u6700\u8fd1\u8bbf\u95ee\u7684\u70ed\u70b9\u6570\u636e\u3002<\/li>\n
      • allkeys-lfu：\u5982\u679c\u6570\u636e\u8bbf\u95ee\u6709\u201c\u957f\u671f\u9891\u7387\u201d\u7279\u5f81（\u5982\u7528\u6237\u504f\u597d\u8bbe\u7f6e，\u9ad8\u9891\u8bbf\u95ee\u7684\u504f\u597d\u957f\u671f\u7a33\u5b9a），LFU\u6bd4LRU\u66f4\u9002\u5408（\u907f\u514d\u5076\u5c14\u8bbf\u95ee\u7684\u51b7\u6570\u636e\u88ab\u4fdd\u7559）\u3002<\/li>\n<\/ul>\n

        2. \u6709\u8fc7\u671f\u65f6\u95f4\u7684\u4e1a\u52a1（\u5982\u9a8c\u8bc1\u7801\u3001\u4e34\u65f6\u4ee4\u724c）<\/h4>\n

        \u8fd9\u7c7b\u573a\u666f\u4e2d，\u6570\u636e\u672c\u8eab\u6709\u8fc7\u671f\u65f6\u95f4，\u6dd8\u6c70\u5e94\u4f18\u5148\u8003\u8651\u8fc7\u671f\u76f8\u5173\u89c4\u5219：<\/p>\n

          \n
        • volatile-ttl：\u5982\u679c\u5e0c\u671b\u201c\u5373\u5c06\u8fc7\u671f\u7684\u6570\u636e\u4f18\u5148\u88ab\u6dd8\u6c70\u201d（\u598210\u5206\u949f\u540e\u8fc7\u671f\u7684\u9a8c\u8bc1\u7801，\u4f18\u5148\u6dd8\u6c70\u5269\u4f591\u5206\u949f\u7684，\u4fdd\u7559\u5269\u4f595\u5206\u949f\u7684），\u9009\u6b64\u7b56\u7565\u3002<\/li>\n
        • volatile-lru：\u5982\u679c\u8fc7\u671f\u6570\u636e\u4e2d\u4e5f\u6709\u8bbf\u95ee\u9891\u7387\u5dee\u5f02（\u5982\u4e34\u65f6\u4ee4\u724c，\u6d3b\u8dc3\u7528\u6237\u7684\u4ee4\u724c\u88ab\u9891\u7e41\u9a8c\u8bc1），\u5e0c\u671b\u4fdd\u7559\u5e38\u8bbf\u95ee\u7684\u8fc7\u671f\u6570\u636e（\u672a\u771f\u6b63\u8fc7\u671f\u524d），\u9009\u6b64\u7b56\u7565\u3002<\/li>\n<\/ul>\n

          3. \u4e0d\u5141\u8bb8\u6570\u636e\u4e22\u5931\u7684\u573a\u666f（\u5982\u914d\u7f6e\u5b58\u50a8\u3001\u8ba1\u6570\u5668）<\/h4>\n

          \u5982\u679c\u6570\u636e\u4e00\u65e6\u4e22\u5931\u4f1a\u5f71\u54cd\u4e1a\u52a1（\u5982\u7cfb\u7edf\u6838\u5fc3\u914d\u7f6e\u3001\u4e0d\u53ef\u91cd\u5efa\u7684\u8ba1\u6570\u5668），\u5e94\u9009\u62e9：<\/p>\n

            \n
          • noeviction：\u62d2\u7edd\u65b0\u5199\u64cd\u4f5c，\u5f3a\u5236\u4e1a\u52a1\u5c42\u5904\u7406\u5185\u5b58\u6ee1\u7684\u95ee\u9898（\u5982\u6269\u5bb9\u3001\u6e05\u7406\u65e0\u6548\u6570\u636e），\u907f\u514d\u6570\u636e\u88ab\u8bef\u5220\u3002<\/li>\n<\/ul>\n

            4. \u6570\u636e\u8bbf\u95ee\u5747\u5300，\u65e0\u660e\u663e\u70ed\u70b9（\u5982\u65e5\u5fd7\u7f13\u5b58）<\/h4>\n

            \u5982\u679c\u6240\u6709\u6570\u636e\u7684\u8bbf\u95ee\u9891\u7387\u63a5\u8fd1（\u5982\u7528\u6237\u64cd\u4f5c\u65e5\u5fd7，\u6bcf\u6761\u65e5\u5fd7\u88ab\u8bbf\u95ee\u7684\u6982\u7387\u76f8\u540c），\u968f\u673a\u6dd8\u6c70\u66f4\u9ad8\u6548：<\/p>\n

              \n
            • allkeys-random \u6216 volatile-random（\u6839\u636e\u662f\u5426\u6709\u8fc7\u671f\u65f6\u95f4\u9009\u62e9）\u3002<\/li>\n<\/ul>\n

              \u989d\u5916\u63d0\u9192：\u914d\u5408\u8fc7\u671f\u65f6\u95f4\u8bbe\u7f6e\u6548\u679c\u66f4\u4f73<\/h4>\n

              \u5373\u4f7f\u9009\u62e9\u4e86allkeys-lru\u8fd9\u7c7b\u5168\u5c40\u7b56\u7565，\u4e3a\u6570\u636e\u8bbe\u7f6e\u5408\u7406\u7684\u8fc7\u671f\u65f6\u95f4（expire\u547d\u4ee4）\u4ecd\u7136\u5f88\u91cd\u8981：<\/p>\n

                \n
              • \u907f\u514d\u201c\u50f5\u5c38\u6570\u636e\u201d\u957f\u671f\u5360\u7528\u5185\u5b58（\u5982\u5df2\u4e0b\u67b6\u7684\u5546\u54c1\u7f13\u5b58，\u5373\u4f7f\u88ab\u8bbf\u95ee\u8fc7，\u4e5f\u5e94\u5728\u8fc7\u671f\u540e\u88ab\u6dd8\u6c70）\u3002<\/li>\n
              • \u51cf\u8f7b\u6dd8\u6c70\u7b56\u7565\u7684\u538b\u529b（\u8fc7\u671f\u6570\u636e\u4f1a\u88ab\u4e3b\u52a8\u6e05\u7406，\u51cf\u5c11LRU\/LFU\u7684\u8ba1\u7b97\u91cf）\u3002<\/li>\n<\/ul>\n

                \u516d\u3001\u5e38\u89c1\u95ee\u9898\u89e3\u7b54<\/h3>\n

                1. \u914d\u7f6e\u4e86allkeys-lru，\u4e3a\u4ec0\u4e48\u6709\u4e9b\u521a\u8bbf\u95ee\u7684\u6570\u636e\u88ab\u6dd8\u6c70\u4e86？<\/h4>\n

                \u53ef\u80fd\u539f\u56e0：<\/p>\n

                  \n
                • \u5185\u5b58\u5df2\u6ee1\u65f6，\u65b0\u6570\u636e\u5199\u5165\u89e6\u53d1\u6dd8\u6c70，\u5373\u4f7f\u6570\u636e\u521a\u88ab\u8bbf\u95ee，\u4f46\u5982\u679c\u662f\u91c7\u6837\u4e2d\u201c\u6700\u4e0d\u5e38\u8bbf\u95ee\u201d\u7684（\u76f8\u5bf9\u5176\u4ed6\u91c7\u6837\u6570\u636e），\u4ecd\u53ef\u80fd\u88ab\u6dd8\u6c70\u3002<\/li>\n
                • \u6570\u636e\u672a\u88ab\u6b63\u786e\u201c\u6807\u8bb0\u201d\u4e3a\u8bbf\u95ee：Redis\u7684LRU\u57fa\u4e8e\u201c\u6700\u540e\u4e00\u6b21\u8bbf\u95ee\u65f6\u95f4\u201d，\u5982\u679c\u8bbf\u95ee\u662f\u901a\u8fc7get\u7b49\u547d\u4ee4，\u4f1a\u66f4\u65b0\u65f6\u95f4；\u4f46\u5982\u679c\u662fexists\u3001ttl\u7b49\u547d\u4ee4，\u9ed8\u8ba4\u4e0d\u66f4\u65b0（\u53ef\u901a\u8fc7touch\u547d\u4ee4\u624b\u52a8\u66f4\u65b0\u8bbf\u95ee\u65f6\u95f4）\u3002<\/li>\n<\/ul>\n

                  2. \u5185\u5b58\u6ca1\u5230maxmemory，\u4e3a\u4ec0\u4e48\u6570\u636e\u4e5f\u4f1a\u88ab\u6dd8\u6c70？<\/h4>\n

                  \u4e24\u79cd\u53ef\u80fd：<\/p>\n

                    \n
                  • \u6570\u636e\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4，Redis\u4f1a\u5b9a\u671f\u6e05\u7406\u8fc7\u671f\u952e（\u4e3b\u52a8\u6dd8\u6c70），\u4e0e\u5185\u5b58\u662f\u5426\u6ee1\u65e0\u5173\u3002<\/li>\n
                  • \u5185\u5b58\u788e\u7247：Redis\u4f7f\u7528\u5185\u5b58\u5206\u914d\u5668（\u5982jemalloc），\u53ef\u80fd\u5b58\u5728\u5185\u5b58\u788e\u7247（\u5df2\u91ca\u653e\u4f46\u672a\u88ab\u590d\u7528\u7684\u5185\u5b58），\u5b9e\u9645\u4f7f\u7528\u5185\u5b58\u672a\u5230maxmemory，\u4f46\u53ef\u7528\u5185\u5b58\u4e0d\u8db3，\u89e6\u53d1\u6dd8\u6c70\u3002\u53ef\u901a\u8fc7info memory\u67e5\u770bmem_fragmentation_ratio（\u5185\u5b58\u788e\u7247\u7387），\u5927\u4e8e1.5\u65f6\u5efa\u8bae\u4f18\u5316\u3002<\/li>\n<\/ul>\n

                    3. \u5982\u4f55\u76d1\u63a7\u6dd8\u6c70\u7b56\u7565\u7684\u6548\u679c？<\/h4>\n

                    \u901a\u8fc7info stats\u547d\u4ee4\u67e5\u770b\u76f8\u5173\u6307\u6807：<\/p>\n

                      \n
                    • evicted_keys：\u88ab\u6dd8\u6c70\u7b56\u7565\u5220\u9664\u7684\u952e\u6570\u91cf（\u6570\u503c\u589e\u957f\u8bf4\u660e\u7b56\u7565\u5728\u751f\u6548）\u3002<\/li>\n
                    • keyspace_hits\/keyspace_misses：\u7f13\u5b58\u547d\u4e2d\/\u672a\u547d\u4e2d\u6b21\u6570（\u547d\u4e2d\u7387\u4e0b\u964d\u53ef\u80fd\u8bf4\u660e\u7b56\u7565\u4e0d\u5408\u9002）\u3002<\/li>\n<\/ul>\n

                      \u4e03\u3001\u603b\u7ed3<\/h3>\n

                      Redis\u7684\u6570\u636e\u6dd8\u6c70\u7b56\u7565\u662f\u5185\u5b58\u7ba1\u7406\u7684\u6838\u5fc3，\u5b83\u51b3\u5b9a\u4e86\u5185\u5b58\u6ee1\u65f6\u6570\u636e\u7684\u201c\u751f\u5b58\u89c4\u5219\u201d\u3002\u9009\u62e9\u7b56\u7565\u65f6，\u9700\u7ed3\u5408\u4e1a\u52a1\u573a\u666f\u7684\u201c\u6570\u636e\u4ef7\u503c\u201d\u5224\u65ad：<\/p>\n

                        \n
                      • \u7f13\u5b58\u573a\u666f\u4f18\u5148allkeys-lru\u6216allkeys-lfu；<\/li>\n
                      • \u6709\u8fc7\u671f\u65f6\u95f4\u7684\u573a\u666f\u8003\u8651volatile-ttl\u6216volatile-lru；<\/li>\n
                      • \u4e0d\u5141\u8bb8\u4e22\u5931\u6570\u636e\u9009noeviction；<\/li>\n
                      • \u8bbf\u95ee\u5747\u5300\u9009\u968f\u673a\u7b56\u7565\u3002<\/li>\n<\/ul>\n

                        \u540c\u65f6，\u5408\u7406\u914d\u7f6emaxmemory\u3001\u91c7\u6837\u6570，\u914d\u5408\u8fc7\u671f\u65f6\u95f4\u8bbe\u7f6e，\u5e76\u901a\u8fc7\u76d1\u63a7\u6307\u6807\u6301\u7eed\u4f18\u5316，\u624d\u80fd\u8ba9\u6dd8\u6c70\u7b56\u7565\u771f\u6b63\u53d1\u6325\u4f5c\u7528，\u4fdd\u8bc1Redis\u7684\u9ad8\u6027\u80fd\u548c\u7a33\u5b9a\u6027\u3002<\/p>\n

                        \u5e0c\u671b\u672c\u6587\u80fd\u5e2e\u4f60\u7406\u6e05Redis\u6dd8\u6c70\u7b56\u7565\u7684\u903b\u8f91，\u5728\u5b9e\u9645\u4e1a\u52a1\u4e2d\u5c11\u8d70\u5f2f\u8def\u3002\u5982\u679c\u6709\u5176\u4ed6\u7591\u95ee，\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u4ea4\u6d41！<\/p>\n","protected":false},"excerpt":{"rendered":"

                        \u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb474\u6b21\uff0c\u70b9\u8d5e8\u6b21\uff0c\u6536\u85cf4\u6b21\u3002Redis\u6570\u636e\u6dd8\u6c70\u7b56\u7565\u662f\u5185\u5b58\u7ba1\u7406\u7684\u6838\u5fc3\u673a\u5236\uff0c\u5f53\u5185\u5b58\u8fbe\u5230maxmemory\u9650\u5236\u65f6\u51b3\u5b9a\u5982\u4f55\u5904\u7f6e\u65b0\u5199\u5165\u6570\u636e\u3002Redis\u63d0\u4f9b8\u79cd\u7b56\u7565\uff0c\u5206\u4e3a\u5168\u5c40\u6dd8\u6c70\u548c\u8fc7\u671f\u952e\u6dd8\u6c70\u4e24\u7c7b\uff0c\u5305\u62ecnoeviction\u3001allkeys-lru\u3001volatile-lfu\u7b49\u3002LRU\u57fa\u4e8e\u6700\u8fd1\u8bbf\u95ee\u65f6\u95f4\uff0cLFU\u57fa\u4e8e\u8bbf\u95ee\u9891\u7387\uff0c\u5b9e\u9645\u91c7\u7528\u8fd1\u4f3c\u7b97\u6cd5\u5e73\u8861\u6027\u80fd\u4e0e\u7cbe\u5ea6\u3002\u914d\u7f6e\u53ef\u901a\u8fc7redis.conf\u6216config set\u547d\u4ee4\u52a8\u6001\u8c03\u6574\u3002\u5b9e\u8df5\u5efa\u8bae\uff1a\u7f13\u5b58\u573a\u666f\u7528allkeys-lru\/allkeys-lfu\uff0c\u4e34\u65f6\u6570\u636e\u7528volatile-ttl\uff0c\u5173\u952e\u6570\u636e\u7528noeviction\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[105,100,398],"topic":[],"class_list":["post-48512","post","type-post","status-publish","format-standard","hentry","category-server","tag-redis","tag-100","tag-398"],"yoast_head":"\nRedis\u6570\u636e\u6dd8\u6c70\u7b56\u7565\u8be6\u89e3\uff1a\u4ece\u539f\u7406\u5230\u5b9e\u8df5 - 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