{"id":201467,"date":"2025-05-10T08:41:07","date_gmt":"2025-05-10T00:41:07","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201467\/"},"modified":"2025-05-10T08:41:07","modified_gmt":"2025-05-10T00:41:07","slug":"%e5%85%b3%e4%ba%8eredis%e7%9a%84%e6%95%b0%e6%8d%ae%e6%b8%85%e7%90%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201467\/","title":{"rendered":"\u5173\u4e8eRedis\u7684\u6570\u636e\u6e05\u7406"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u5173\u4e8eRedis\u7684\u6570\u636e\u6e05\u7406<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>IT\u884c\u4e1a\u76f8\u5bf9\u4e8e\u4e00\u822c\u4f20\u7edf\u884c\u4e1a\uff0c\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u66f4\u5feb\uff0c\u4e00\u65e6\u505c\u6b62\u4e86\u5b66\u4e60\uff0c\u5f88\u5feb\u5c31\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u6240\u4ee5\u6211\u4eec\u9700\u8981\u8e0f\u8e0f\u5b9e\u5b9e\u7684\u4e0d\u65ad\u5b66\u4e60\uff0c\u7cbe\u8fdb\u81ea\u5df1\u7684\u6280\u672f\uff0c\u5c24\u5176\u662f\u521d\u5b66\u8005\u3002\u4eca\u5929golang\u5b66\u4e60\u7f51\u7ed9\u5927\u5bb6\u6574\u7406\u4e86\u300a\u5173\u4e8eRedis\u7684\u6570\u636e\u6e05\u7406\u300b\uff0c\u804a\u804aRedis\u3001\u6570\u636e\u3001\u6e05\u7406\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01<\/p>\n<p>\u6211\u4eec\u6570\u636e\u5e73\u53f0\u4e2d\u6709\u4f7f\u7528Redis\u6765\u7ed9\u7ebf\u4e0a\u63d0\u4f9b\u4f4e\u5ef6\u65f6(20\u6beb\u79d2\u4ee5\u5185)\u7684\u9ad8\u5e76\u53d1\u8bfb\u5199\u8bf7\u6c42\uff0c\u5176\u4e2d***\u7684Redis\u4f7f\u7528\u4e86\u963f\u91cc\u4e91\u7684Redis\u96c6\u7fa4(256G)\uff0c\u5b58\u50a8\u7684\u8bb0\u5f55\u8d85\u8fc710\u4ebf\uff0cKey\u7684\u6709\u6548\u671f\u8bbe\u7f6e\u4e3a15\u5929\uff0c\u6bcf\u5929\u5199\u5165\u7684\u8bb0\u5f55\u5927\u69825000\u4e07\u5de6\u53f3\uff0cQPS\u5927\u6982\u57286\u4e07\u5de6\u53f3\u3002\u7531\u4e8e\u8fc7\u671fKey\u7684\u4ea7\u751f\u901f\u5ea6\u5927\u4e8eRedis\u81ea\u52a8\u6e05\u7406\u7684\u901f\u5ea6\uff0c\u56e0\u6b64\u5728Redis\u4e2d\u4f1a\u6709\u5927\u91cf\u8fc7\u671fKey\u672a\u88ab\u53ca\u65f6\u6e05\u7406\u3002<\/p>\n<p>\u4e3a\u4ec0\u4e48\u6709\u8fc7\u671f\u7684Key\u672a\u88ab\u6e05\u7406\u5462?\u8fd9\u4e2a\u5f97\u5148\u719f\u6089\u4e00\u4e0bRedis\u7684\u5220\u9664\u7b56\u7565\u3002<\/p>\n<p>Redis\u5e38\u7528\u7684\u5220\u9664\u7b56\u7565\u6709\u4ee5\u4e0b\u4e09\u79cd\uff1a<\/p>\n<ul>\n<li>\u88ab\u52a8\u5220\u9664(\u60f0\u6027\u5220\u9664)\uff1a\u5f53\u8bfb\/\u5199\u4e00\u4e2a\u5df2\u7ecf\u8fc7\u671f\u7684Key\u65f6\uff0c\u4f1a\u89e6\u53d1\u60f0\u6027\u5220\u9664\u7b56\u7565\uff0c\u76f4\u63a5\u5220\u9664\u6389\u8fd9\u4e2aKey;<\/li>\n<li>\u4e3b\u52a8\u5220\u9664(\u5b9a\u671f\u5220\u9664)\uff1aRedis\u4f1a\u5b9a\u671f\u5de1\u68c0\uff0c\u6765\u6e05\u7406\u8fc7\u671fKey;<\/li>\n<li>\u5f53\u5185\u5b58\u8fbe\u5230maxmemory\u914d\u7f6e\u65f6\u5019\uff0c\u4f1a\u89e6\u53d1Key\u7684\u5220\u9664\u64cd\u4f5c;<\/li>\n<\/ul>\n<p>\u53e6\u5916\uff0c\u8fd8\u6709\u4e00\u79cd\u57fa\u4e8e\u89e6\u53d1\u5668\u7684\u5220\u9664\u7b56\u7565\uff0c\u56e0\u4e3a\u5bf9Redis\u538b\u529b\u592a\u5927\uff0c\u4e00\u822c\u6ca1\u4eba\u4f7f\u7528\u3002<\/p>\n<p>\u8fd9\u91cc\u5148\u4ecb\u7ecd\u540e\u4e24\u79cd\u5220\u9664\u7b56\u7565(\u7f51\u4e0a\u6709\u5f88\u591a\u8bf4\u660e)\u3002<\/p>\n<p><strong>\u4e3b\u52a8\u5220\u9664(\u5b9a\u671f\u5220\u9664)<\/strong><\/p>\n<p>\u5728 Redis \u4e2d\uff0c\u5e38\u89c4\u64cd\u4f5c\u7531 redis.c\/serverCron \u5b9e\u73b0\uff0c\u5b83\u4e3b\u8981\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n<ul>\n<li>\u66f4\u65b0\u670d\u52a1\u5668\u7684\u5404\u7c7b\u7edf\u8ba1\u4fe1\u606f\uff0c\u6bd4\u5982\u65f6\u95f4\u3001\u5185\u5b58\u5360\u7528\u3001\u6570\u636e\u5e93\u5360\u7528\u60c5\u51b5\u7b49\u3002<\/li>\n<li>\u6e05\u7406\u6570\u636e\u5e93\u4e2d\u7684\u8fc7\u671f\u952e\u503c\u5bf9\u3002<\/li>\n<li>\u5bf9\u4e0d\u5408\u7406\u7684\u6570\u636e\u5e93\u8fdb\u884c\u5927\u5c0f\u8c03\u6574\u3002<\/li>\n<li>\u5173\u95ed\u548c\u6e05\u7406\u8fde\u63a5\u5931\u6548\u7684\u5ba2\u6237\u7aef\u3002<\/li>\n<li>\u5c1d\u8bd5\u8fdb\u884c AOF \u6216 RDB \u6301\u4e45\u5316\u64cd\u4f5c\u3002<\/li>\n<li>\u5982\u679c\u670d\u52a1\u5668\u662f\u4e3b\u8282\u70b9\u7684\u8bdd\uff0c\u5bf9\u9644\u5c5e\u8282\u70b9\u8fdb\u884c\u5b9a\u671f\u540c\u6b65\u3002<\/li>\n<li>\u5982\u679c\u5904\u4e8e\u96c6\u7fa4\u6a21\u5f0f\u7684\u8bdd\uff0c\u5bf9\u96c6\u7fa4\u8fdb\u884c\u5b9a\u671f\u540c\u6b65\u548c\u8fde\u63a5\u6d4b\u8bd5\u3002<\/li>\n<\/ul>\n<p>Redis \u5c06 serverCron \u4f5c\u4e3a\u65f6\u95f4\u4e8b\u4ef6\u6765\u8fd0\u884c\uff0c\u4ece\u800c\u786e\u4fdd\u5b83\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u5c31\u4f1a\u81ea\u52a8\u8fd0\u884c\u4e00\u6b21\uff0c \u53c8\u56e0\u4e3a serverCron \u9700\u8981\u5728 Redis \u670d\u52a1\u5668\u8fd0\u884c\u671f\u95f4\u4e00\u76f4\u5b9a\u671f\u8fd0\u884c\uff0c \u6240\u4ee5\u5b83\u662f\u4e00\u4e2a\u5faa\u73af\u65f6\u95f4\u4e8b\u4ef6\uff1aserverCron \u4f1a\u4e00\u76f4\u5b9a\u671f\u6267\u884c\uff0c\u76f4\u5230\u670d\u52a1\u5668\u5173\u95ed\u4e3a\u6b62\u3002<\/p>\n<p>\u5728 Redis 2.6 \u7248\u672c\u4e2d\uff0c \u7a0b\u5e8f\u89c4\u5b9a serverCron \u6bcf\u79d2\u8fd0\u884c 10 \u6b21\uff0c \u5e73\u5747\u6bcf 100 \u6beb\u79d2\u8fd0\u884c\u4e00\u6b21\u3002 \u4ece Redis 2.8 \u5f00\u59cb\uff0c \u7528\u6237\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539 hz\u9009\u9879\u6765\u8c03\u6574 serverCron \u7684\u6bcf\u79d2\u6267\u884c\u6b21\u6570\uff0c \u5177\u4f53\u4fe1\u606f\u8bf7\u53c2\u8003 redis.conf \u6587\u4ef6\u4e2d\u5173\u4e8e hz \u9009\u9879\u7684\u8bf4\u660e\u3002<\/p>\n<p>\u4e5f\u53eb\u5b9a\u65f6\u5220\u9664\uff0c\u8fd9\u91cc\u7684\u201c\u5b9a\u671f\u201d\u6307\u7684\u662fRedis\u5b9a\u671f\u89e6\u53d1\u7684\u6e05\u7406\u7b56\u7565\uff0c\u7531\u4f4d\u4e8esrc\/redis.c\u7684activeExpireCycle(void)\u51fd\u6570\u6765\u5b8c\u6210\u3002<\/p>\n<p>serverCron\u662f\u7531redis\u7684\u4e8b\u4ef6\u6846\u67b6\u9a71\u52a8\u7684\u5b9a\u4f4d\u4efb\u52a1\uff0c\u8fd9\u4e2a\u5b9a\u65f6\u4efb\u52a1\u4e2d\u4f1a\u8c03\u7528activeExpireCycle\u51fd\u6570\uff0c\u9488\u5bf9\u6bcf\u4e2adb\u5728\u9650\u5236\u7684\u65f6\u95f4REDIS_EXPIRELOOKUPS_TIME_LIMIT\u5185\u8fdf\u53ef\u80fd\u591a\u7684\u5220\u9664\u8fc7\u671fkey\uff0c\u4e4b\u6240\u4ee5\u8981\u9650\u5236\u65f6\u95f4\u662f\u4e3a\u4e86\u9632\u6b62\u8fc7\u957f\u65f6\u95f4 \u7684\u963b\u585e\u5f71\u54cdredis\u7684\u6b63\u5e38\u8fd0\u884c\u3002\u8fd9\u79cd\u4e3b\u52a8\u5220\u9664\u7b56\u7565\u5f25\u8865\u4e86\u88ab\u52a8\u5220\u9664\u7b56\u7565\u5728\u5185\u5b58\u4e0a\u7684\u4e0d\u53cb\u597d\u3002<\/p>\n<p>\u56e0\u6b64\uff0cRedis\u4f1a\u5468\u671f\u6027\u7684\u968f\u673a\u6d4b\u8bd5\u4e00\u6279\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684key\u5e76\u8fdb\u884c\u5904\u7406\u3002\u6d4b\u8bd5\u5230\u7684\u5df2\u8fc7\u671f\u7684key\u5c06\u88ab\u5220\u9664\u3002\u5178\u578b\u7684\u65b9\u5f0f\u4e3a,Redis\u6bcf\u79d2\u505a10\u6b21\u5982\u4e0b\u7684\u6b65\u9aa4\uff1a<\/p>\n<ul>\n<li>\u968f\u673a\u6d4b\u8bd5100\u4e2a\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684key<\/li>\n<li>\u5220\u9664\u6240\u6709\u53d1\u73b0\u7684\u5df2\u8fc7\u671f\u7684key<\/li>\n<li>\u82e5\u5220\u9664\u7684key\u8d85\u8fc725\u4e2a\u5219\u91cd\u590d\u6b65\u9aa41<\/li>\n<\/ul>\n<p>\u8fd9\u662f\u4e00\u4e2a\u57fa\u4e8e\u6982\u7387\u7684\u7b80\u5355\u7b97\u6cd5\uff0c\u57fa\u672c\u7684\u5047\u8bbe\u662f\u62bd\u51fa\u7684\u6837\u672c\u80fd\u591f\u4ee3\u8868\u6574\u4e2akey\u7a7a\u95f4\uff0credis\u6301\u7eed\u6e05\u7406\u8fc7\u671f\u7684\u6570\u636e\u76f4\u81f3\u5c06\u8981\u8fc7\u671f\u7684key\u7684\u767e\u5206\u6bd4\u964d\u5230\u4e8625%\u4ee5\u4e0b\u3002\u8fd9\u4e5f\u610f\u5473\u7740\u5728\u4efb\u4f55\u7ed9\u5b9a\u7684\u65f6\u523b\u5df2\u7ecf\u8fc7\u671f\u4f46\u4ecd\u5360\u636e\u7740\u5185\u5b58\u7a7a\u95f4\u7684key\u7684\u91cf\u6700\u591a\u4e3a\u6bcf\u79d2\u7684\u5199\u64cd\u4f5c\u91cf\u9664\u4ee54.<\/p>\n<p>Redis-3.0.0\u4e2d\u7684\u9ed8\u8ba4\u503c\u662f10\uff0c\u4ee3\u8868\u6bcf\u79d2\u949f\u8c03\u752810\u6b21\u540e\u53f0\u4efb\u52a1\u3002<\/p>\n<p>\u9664\u4e86\u4e3b\u52a8\u6dd8\u6c70\u7684\u9891\u7387\u5916\uff0cRedis\u5bf9\u6bcf\u6b21\u6dd8\u6c70\u4efb\u52a1\u6267\u884c\u7684***\u65f6\u957f\u4e5f\u6709\u4e00\u4e2a\u9650\u5b9a\uff0c\u8fd9\u6837\u4fdd\u8bc1\u4e86\u6bcf\u6b21\u4e3b\u52a8\u6dd8\u6c70\u4e0d\u4f1a\u8fc7\u591a\u963b\u585e\u5e94\u7528\u8bf7\u6c42\uff0c\u4ee5\u4e0b\u662f\u8fd9\u4e2a\u9650\u5b9a\u8ba1\u7b97\u516c\u5f0f\uff1a<\/p>\n<\/p>\n<pre>#define&nbsp;ACTIVE_EXPIRE_CYCLE_SLOW_TIME_PERC&nbsp;25&nbsp;\/*&nbsp;CPU&nbsp;max&nbsp;%&nbsp;for&nbsp;keys&nbsp;collection&nbsp;*\/&nbsp;&nbsp;\r\n\u2026&nbsp;&nbsp;\r\ntimelimit&nbsp;=&nbsp;1000000*ACTIVE_EXPIRE_CYCLE_SLOW_TIME_PERC\/server.hz\/100;&nbsp;\r\n<\/pre>\n<p>hz\u8c03\u5927\u5c06\u4f1a\u63d0\u9ad8Redis\u4e3b\u52a8\u6dd8\u6c70\u7684\u9891\u7387\uff0c\u5982\u679c\u4f60\u7684Redis\u5b58\u50a8\u4e2d\u5305\u542b\u5f88\u591a\u51b7\u6570\u636e\u5360\u7528\u5185\u5b58\u8fc7\u5927\u7684\u8bdd\uff0c\u53ef\u4ee5\u8003\u8651\u5c06\u8fd9\u4e2a\u503c\u8c03\u5927\uff0c\u4f46Redis\u4f5c\u8005\u5efa\u8bae\u8fd9\u4e2a\u503c\u4e0d\u8981\u8d85\u8fc7100\u3002\u6211\u4eec\u5b9e\u9645\u7ebf\u4e0a\u5c06\u8fd9\u4e2a\u503c\u8c03\u5927\u5230100\uff0c\u89c2\u5bdf\u5230CPU\u4f1a\u589e\u52a02%\u5de6\u53f3\uff0c\u4f46\u5bf9\u51b7\u6570\u636e\u7684\u5185\u5b58\u91ca\u653e\u901f\u5ea6\u786e\u5b9e\u6709\u660e\u663e\u7684\u63d0\u9ad8(\u901a\u8fc7\u89c2\u5bdfkeyspace\u4e2a\u6570\u548cused_memory\u5927\u5c0f)\u3002<\/p>\n<p>\u53ef\u4ee5\u770b\u51fatimelimit\u548cserver.hz\u662f\u4e00\u4e2a\u5012\u6570\u7684\u5173\u7cfb\uff0c\u4e5f\u5c31\u662f\u8bf4hz\u914d\u7f6e\u8d8a\u5927\uff0ctimelimit\u5c31\u8d8a\u5c0f\u3002\u6362\u53e5\u8bdd\u8bf4\u662f\u6bcf\u79d2\u949f\u671f\u671b\u7684\u4e3b\u52a8\u6dd8\u6c70\u9891\u7387\u8d8a\u9ad8\uff0c\u5219\u6bcf\u6b21\u6dd8\u6c70\u6700\u957f\u5360\u7528\u65f6\u95f4\u5c31\u8d8a\u77ed\u3002\u8fd9\u91cc\u6bcf\u79d2\u949f\u7684\u6700\u957f\u6dd8\u6c70\u5360\u7528\u65f6\u95f4\u662f\u56fa\u5b9a\u7684250ms(1000000*ACTIVE_EXPIRE_CYCLE_SLOW_TIME_PERC\/100)\uff0c\u800c\u6dd8\u6c70\u9891\u7387\u548c\u6bcf\u6b21\u6dd8\u6c70\u7684\u6700\u957f\u65f6\u95f4\u662f\u901a\u8fc7hz\u53c2\u6570\u63a7\u5236\u7684\u3002<\/p>\n<p>\u4ece\u4ee5\u4e0a\u7684\u5206\u6790\u770b\uff0c\u5f53redis\u4e2d\u7684\u8fc7\u671fkey\u6bd4\u7387\u6ca1\u6709\u8d85\u8fc725%\u4e4b\u524d\uff0c\u63d0\u9ad8hz\u53ef\u4ee5\u660e\u663e\u63d0\u9ad8\u626b\u63cfkey\u7684\u6700\u5c0f\u4e2a\u6570\u3002\u5047\u8bbehz\u4e3a10\uff0c\u5219\u4e00\u79d2\u5185\u6700\u5c11\u626b\u63cf200\u4e2akey(\u4e00\u79d2\u8c03\u752810\u6b21*\u6bcf\u6b21\u6700\u5c11\u968f\u673a\u53d6\u51fa20\u4e2akey)\uff0c\u5982\u679chz\u6539\u4e3a100\uff0c\u5219\u4e00\u79d2\u5185\u6700\u5c11\u626b\u63cf2000\u4e2akey;\u53e6\u4e00\u65b9\u9762\uff0c\u5982\u679c\u8fc7\u671fkey\u6bd4\u7387\u8d85\u8fc725%\uff0c\u5219\u626b\u63cfkey\u7684\u4e2a\u6570\u65e0\u4e0a\u9650\uff0c\u4f46\u662fcpu\u65f6\u95f4\u6bcf\u79d2\u949f\u6700\u591a\u5360\u7528250ms\u3002<\/p>\n<p>\u5f53REDIS\u8fd0\u884c\u5728\u4e3b\u4ece\u6a21\u5f0f\u65f6\uff0c\u53ea\u6709\u4e3b\u7ed3\u70b9\u624d\u4f1a\u6267\u884c\u4e0a\u8ff0\u8fd9\u4e24\u79cd\u8fc7\u671f\u5220\u9664\u7b56\u7565\uff0c\u7136\u540e\u628a\u5220\u9664\u64cd\u4f5c\u201ddel key\u201d\u540c\u6b65\u5230\u4ece\u7ed3\u70b9\u3002<\/p>\n<p><strong>maxmemory<\/strong><\/p>\n<p>\u5f53\u524d\u5df2\u7528\u5185\u5b58\u8d85\u8fc7maxmemory\u9650\u5b9a\u65f6\uff0c\u89e6\u53d1\u4e3b\u52a8\u6e05\u7406\u7b56\u7565\uff0c\u8fd9\u4e9b\u7b56\u7565\u53ef\u4ee5\u914d\u7f6e(\u53c2\u6570maxmemory-policy)\uff0c\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\uff1a<\/p>\n<p>volatile-lru\uff1a\u4ece\u5df2\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684\u6570\u636e\u96c6(server.db[i].expires)\u4e2d\u6311\u9009\u6700\u8fd1\u6700\u5c11\u4f7f\u7528\u7684\u6570\u636e\u6dd8\u6c70<\/p>\n<p>volatile-ttl\uff1a\u4ece\u5df2\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684\u6570\u636e\u96c6(server.db[i].expires)\u4e2d\u6311\u9009\u5c06\u8981\u8fc7\u671f\u7684\u6570\u636e\u6dd8\u6c70<\/p>\n<p>volatile-random\uff1a\u4ece\u5df2\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684\u6570\u636e\u96c6(server.db[i].expires)\u4e2d\u4efb\u610f\u9009\u62e9\u6570\u636e\u6dd8\u6c70<\/p>\n<p>allkeys-lru\uff1a\u4ece\u6570\u636e\u96c6(server.db[i].dict)\u4e2d\u6311\u9009\u6700\u8fd1\u6700\u5c11\u4f7f\u7528\u7684\u6570\u636e\u6dd8\u6c70<\/p>\n<p>allkeys-random\uff1a\u4ece\u6570\u636e\u96c6(server.db[i].dict)\u4e2d\u4efb\u610f\u9009\u62e9\u6570\u636e\u6dd8\u6c70<\/p>\n<p>no-enviction(\u9a71\u9010)\uff1a\u7981\u6b62\u9a71\u9010\u6570\u636e<\/p>\n<p>\u5f53mem_used\u5185\u5b58\u5df2\u7ecf\u8d85\u8fc7maxmemory\u7684\u8bbe\u5b9a\uff0c\u5bf9\u4e8e\u6240\u6709\u7684\u8bfb\u5199\u8bf7\u6c42\uff0c\u90fd\u4f1a\u89e6\u53d1redis.c\/freeMemoryIfNeeded(void)\u51fd\u6570\u4ee5\u6e05\u7406\u8d85\u51fa\u7684\u5185\u5b58\u3002\u6ce8\u610f\u8fd9\u4e2a\u6e05\u7406\u8fc7\u7a0b\u662f\u963b\u585e\u7684\uff0c\u76f4\u5230\u6e05\u7406\u51fa\u8db3\u591f\u7684\u5185\u5b58\u7a7a\u95f4\u3002\u6240\u4ee5\u5982\u679c\u5728\u8fbe\u5230maxmemory\u5e76\u4e14\u8c03\u7528\u65b9\u8fd8\u5728\u4e0d\u65ad\u5199\u5165\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u4f1a\u53cd\u590d\u89e6\u53d1\u4e3b\u52a8\u6e05\u7406\u7b56\u7565\uff0c\u5bfc\u81f4\u8bf7\u6c42\u4f1a\u6709\u4e00\u5b9a\u7684\u5ef6\u8fdf\u3002<\/p>\n<p>\u6e05\u7406\u65f6\u4f1a\u6839\u636e\u7528\u6237\u914d\u7f6e\u7684maxmemory-policy\u6765\u505a\u9002\u5f53\u7684\u6e05\u7406(\u4e00\u822c\u662fLRU\u6216TTL)\uff0c\u8fd9\u91cc\u7684LRU\u6216TTL\u7b56\u7565\u5e76\u4e0d\u662f\u9488\u5bf9redis\u7684\u6240\u6709key\uff0c\u800c\u662f\u4ee5\u914d\u7f6e\u6587\u4ef6\u4e2d\u7684maxmemory-samples\u4e2akey\u4f5c\u4e3a\u6837\u672c\u6c60\u8fdb\u884c\u62bd\u6837\u6e05\u7406\u3002<\/p>\n<p><strong>\u603b\u7ed3\u4e0e\u5907\u5fd8<\/strong><\/p>\n<p>\u5982\u679cRedis\u4e2d\u6bcf\u5929\u8fc7\u671f\u5927\u91cfKey(\u6bd4\u5982\u51e0\u5343\u4e07)\uff0c\u90a3\u4e48\u5fc5\u987b\u5f97\u8003\u8651\u8fc7\u671fKey\u7684\u6e05\u7406\uff1a<\/p>\n<p>\u589e\u52a0Redis\u4e3b\u52a8\u6e05\u7406\u7684\u9891\u7387(\u901a\u8fc7\u8c03\u5927hz\u53c2\u6570);<\/p>\n<p>\u624b\u52a8\u6e05\u7406\u8fc7\u671fKey\uff0c\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u8fdb\u884cscan\u64cd\u4f5c\uff0cscan\u64cd\u4f5c\u4f1a\u89e6\u53d1***\u79cd\u88ab\u52a8\u5220\u9664\uff0cscan\u64cd\u4f5c\u65f6\u5019\u522b\u5fd8\u4e86\u52a0count;<\/p>\n<p>dbsize\u547d\u4ee4\u8fd4\u56de\u7684Key\u6570\u91cf\uff0c\u5305\u542b\u4e86\u8fc7\u671fKey;<\/p>\n<p>randomkey\u547d\u4ee4\u8fd4\u56de\u7684Key\uff0c\u4e0d\u5305\u542b\u8fc7\u671fKey;<\/p>\n<p>scan\u547d\u4ee4\u8fd4\u56de\u7684Key\uff0c\u5305\u542b\u8fc7\u671fKey;<\/p>\n<p>info\u547d\u4ee4\u8fd4\u56de\u7684# Keyspace\uff1a<\/p>\n<p>db6:keys=1034937352,expires=994731489,avg_ttl=507838502<\/p>\n<p>keys\u5bf9\u5e94\u7684Key\u6570\u91cf\u7b49\u540c\u4e8edbsize;<\/p>\n<p>expires\u6307\u7684\u662f\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684Key\u6570\u91cf;<\/p>\n<p>avg_ttl\u6307\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684Key\u7684\u5e73\u5747\u8fc7\u671f\u65f6\u95f4(\u5355\u4f4d\uff1a\u6beb\u79d2);<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5173\u4e8eRedis\u7684\u6570\u636e\u6e05\u7406 \u6536\u85cf &#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-201467","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201467","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=201467"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201467\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201467"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201467"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201467"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}