{"id":944,"date":"2017-08-23T20:24:28","date_gmt":"2017-08-23T12:24:28","guid":{"rendered":"https:\/\/www.ipcpu.com\/?p=944"},"modified":"2017-08-23T20:24:28","modified_gmt":"2017-08-23T12:24:28","slug":"redis-expire-out","status":"publish","type":"post","link":"https:\/\/c.ipcpu.com\/2017\/08\/redis-expire-out\/","title":{"rendered":"Redis\u4e13\u9898\u4e8c\u3001\u8fc7\u671f\u65f6\u95f4\u3001\u5185\u5b58\u9010\u51fa\u548c\u6570\u636e\u6301\u4e45\u5316"},"content":{"rendered":"<p>Redis\u4e13\u9898\u4e8c\u3001\u8fc7\u671f\u65f6\u95f4\u3001\u5185\u5b58\u9010\u51fa\u548c\u6570\u636e\u6301\u4e45\u5316.md<\/p>\n<h2 id=\"KEY\u7684\u8fc7\u671f\u65f6\u95f4\">KEY\u7684\u8fc7\u671f\u65f6\u95f4<\/h2>\n<p>Redis\u53ef\u4ee5\u8bbe\u7f6e\u952e(KEY)\u7684\u8d85\u65f6\u65f6\u95f4\u3002\u547d\u4ee4\u662fexpire\uff0c\u67e5\u770b\u8d85\u65f6\u65f6\u95f4\u7684\u547d\u4ee4\u662fttl\u3002\u5982\u4e0b<\/p>\n<div>\n<pre><code>127.0.0.1:6379&gt; set ipcpu:001 abcdefg\nOK\n127.0.0.1:6379&gt; EXPIRE ipcpu:001 600\n(integer) 1\n127.0.0.1:6379&gt; ttl ipcpu:001\n(integer) 590\n127.0.0.1:6379&gt; ttl ipcpu:001\n(integer) 582\n<\/code><\/pre>\n<\/div>\n<h2 id=\"Redis\u4f7f\u7528\u6700\u5927\u5185\u5b58\u548c\u9a71\u9010\u7b97\u6cd5\">Redis\u4f7f\u7528\u6700\u5927\u5185\u5b58\u548c\u9a71\u9010\u7b97\u6cd5<\/h2>\n<p>\u5728redis\u4e2d\uff0c\u5141\u8bb8\u7528\u6237\u8bbe\u7f6e\u6700\u5927\u4f7f\u7528\u5185\u5b58\u5927\u5c0fmaxmemory\uff08\u9700\u8981\u914d\u5408maxmemory-policy\u4f7f\u7528\uff09\uff0c\u8bbe\u7f6e\u4e3a0\u8868\u793a\u4e0d\u9650\u5236(\u9ed8\u8ba4\u914d\u7f6e)\u3002 <br \/>\n\u751f\u4ea7\u73af\u5883\u4e2d\u9700\u8981\u8bbe\u7f6e\u6b64\u503c\uff0c\u6700\u597d\u4e0d\u8d85\u8fc7\u5185\u5b5860%-70%\u3002 <br \/>\n\u5f53redis\u5185\u5b58\u6570\u636e\u96c6\u5feb\u5230\u8fbemaxmemory\u65f6\uff0credis\u4f1a\u5b9e\u884c\u6570\u636e\u6dd8\u6c70\u7b56\u7565\u3002Redis\u63d0\u4f9b6\u79cd\u6570\u636e\u6dd8\u6c70\u7b56\u7565\uff1a<\/p>\n<div>\n<pre><code>volatile-lru -&gt; remove the key with an expire set using an LRU algorithm\n#@\u6309\u7167LRU\u7b97\u6cd5\u9010\u51fa\u539f\u6709\u6570\u636e\uff0c\u4f46\u4ec5\u9010\u51fa\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684\u6570\u636e\nallkeys-lru -&gt; remove any key according to the LRU algorithm\n#@\u6309\u7167LRU\u7b97\u6cd5\u9010\u51fa\u539f\u6709\u6570\u636e\nvolatile-random -&gt; remove a random key with an expire set\n#@\u968f\u673a\u9010\u51fa\u539f\u6709\u6570\u636e\uff0c\u4f46\u4ec5\u9010\u51fa\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684\u6570\u636e\nallkeys-random -&gt; remove a random key, any key\n#@\u968f\u673a\u9010\u51fa\u539f\u6709\u6570\u636e\nvolatile-ttl -&gt; remove the key with the nearest expire time (minor TTL)\n#@\u4ec5\u9010\u51fa\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684\u6570\u636e\uff0c\u5e76\u4e14\u662f\u6309\u7167TTL\u6709\u5c0f\u5230\u5927\u7684\u987a\u5e8f\u8fdb\u884c\u9010\u51fa\nnoeviction -&gt; don't expire at all, just return an error on write operations\n#@\u4e0d\u9010\u51fa\u4efb\u4f55\u6570\u636e\uff0c\u65b0\u6570\u636e\u7684\u5199\u5165\u4f1a\u5f97\u5230\u4e00\u4e2a\u9519\u8bef\u4fe1\u606f<\/code><\/pre>\n<\/div>\n<p>\u5728redis2.8\u4e2d\u9ed8\u8ba4\u7b56\u7565\u662fvolatile-lru <br \/>\n\u5728redis 3.2\u548credis4.0\u4e2d\u9ed8\u8ba4\u7b56\u7565\u662fnoeviction<\/p>\n<p>\u5f53\u5185\u5b58\u4e0d\u8db3\u65f6\uff0cRedis\u4f1a\u8fd4\u56deOOM\u7684\u9519\u8bef\u4fe1\u606f<\/p>\n<div>\n<pre><code>(error) OOM command not allowed when used memory &gt; 'maxmemory'.<\/code><\/pre>\n<\/div>\n<p>Redis\u4e2d\u7684LRU\u4e0d\u662f\u4e25\u683c\u610f\u4e49\u4e0a\u7684LRU\u7b97\u6cd5\u5b9e\u73b0\uff0c\u662f\u4e00\u79cd\u8fd1\u4f3c\u7684LRU\u5b9e\u73b0\uff0c\u4e3b\u8981\u662f\u4e3a\u4e86\u8282\u7ea6\u5185\u5b58\u5360\u7528\u4ee5\u53ca\u63d0\u5347\u6027\u80fd\u3002Redis\u6709\u8fd9\u6837\u4e00\u4e2a\u914d\u7f6e\u2014\u2014maxmemory-samples\uff0cRedis\u7684LRU\u662f\u53d6\u51fa\u914d\u7f6e\u7684\u6570\u76ee\u7684key\uff0c\u7136\u540e\u4ece\u4e2d\u9009\u62e9\u4e00\u4e2a\u6700\u8fd1\u6700\u4e0d\u7ecf\u5e38\u4f7f\u7528\u7684key\u8fdb\u884c\u7f6e\u6362\uff0c\u9ed8\u8ba4\u662f5\u3002\u53ef\u4ee5\u901a\u8fc7\u8c03\u6574\u6837\u672c\u6570\u91cf\u6765\u53d6\u5f97LRU\u7f6e\u6362\u7b97\u6cd5\u7684\u901f\u5ea6\u6216\u662f\u7cbe\u786e\u6027\u65b9\u9762\u7684\u4f18\u52bf\u3002<\/p>\n<h2 id=\"redis\u7528\u4f5c\u7f13\u5b58\u670d\u52a1\u5668\">redis\u7528\u4f5c\u7f13\u5b58\u670d\u52a1\u5668<\/h2>\n<p>\u7ecf\u8fc7\u4e0a\u8ff0\u5206\u6790\uff0c\u5982\u679c\u60f3\u5c06Redis\u4f5c\u4e3a\u7f13\u5b58\u670d\u52a1\u5668\u4f7f\u7528\uff0c\u6700\u597d\u5c06\u5185\u5b58\u9a71\u9010\u7b97\u6cd5\u6539\u6210allkeys-lru\u3002 <br \/>\n\u56e0\u4e3a\u5f00\u53d1\u4eba\u5458\u5f88\u53ef\u80fd\u6839\u672c\u5c31\u4e0d\u7ed9KEY\u52a0\u4e0aexpire\u65f6\u95f4\uff0c\u9ed8\u8ba4\u914d\u7f6e\u60c5\u51b5\u4e0b\uff0c\u5185\u5b58\u8017\u5c3d\u540e\u4f1a\u62a5\u9519\u3002<\/p>\n<h2 id=\"redis\u6570\u636e\u6301\u4e45\u5316\">redis\u6570\u636e\u6301\u4e45\u5316<\/h2>\n<p>redis\u6709\u4e24\u79cd\u65b9\u5f0f\u652f\u6301\u6301\u4e45\u5316\uff0c\u5206\u522b\u662fRDB\u548cAOF\u3002<\/p>\n<p>RDB\u5373redis database\uff0c\u5b83\u662fredis\u9ed8\u8ba4\u91c7\u7528\u652f\u6301\u6301\u4e45\u5316\u7684\u65b9\u5f0f\u3002RDB\u901a\u8fc7\u5feb\u7167\u5b9e\u73b0\u6301\u4e45\u5316\u7684\u652f\u6301\uff0c\u5f53\u6ee1\u8db3\u4e00\u5b9a\u6761\u4ef6\u65f6\uff0cRDB\u5c06\u5bf9\u5185\u5b58\u4e2d\u7684\u6240\u6709\u6570\u636e\u751f\u6210\u5feb\u7167\uff0c\u5e76\u5b58\u653e\u5230\u786c\u76d8\u4e2d\uff0c\u9ed8\u8ba4\u5b58\u653e\u5728\u5f53\u524d\u6267\u884credis\u670d\u52a1\u7684\u6839\u76ee\u5f55\u7684dump.rdb\u4e2d\u3002<\/p>\n<p>AOF(append only file)\u6301\u4e45\u5316\uff1a\u4ee5\u72ec\u7acb\u65e5\u5fd7\u7684\u65b9\u5f0f\u8bb0\u5f55\u6bcf\u6b21\u5199\u547d\u4ee4\uff0c\u91cd\u542f\u65f6\u518d\u91cd\u65b0\u6267\u884cAOF\u6587\u4ef6\u4e2d\u7684\u547d\u4ee4\u8fbe\u5230\u6062\u590d\u6570\u636e\u7684\u76ee\u7684\u3002 AOF\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u89e3\u51b3\u4e86\u6570\u636e\u6301\u4e45\u5316\u7684\u5b9e\u65f6\u6027\uff0c\u76ee\u524d\u5df2\u7ecf\u662fRedis\u6301\u4e45\u5316\u7684\u4e3b\u6d41\u65b9\u5f0f\u3002<\/p>\n<h4 id=\"RDB\">RDB<\/h4>\n<p>RDB\u6301\u4e45\u5316\u662f\u628a\u5f53\u524d\u8fdb\u7a0b\u6570\u636e\u751f\u6210\u5feb\u7167\u4fdd\u5b58\u5230\u786c\u76d8\u7684\u8fc7\u7a0b\uff0c \u89e6\u53d1RDB\u6301\u4e45\u5316\u8fc7\u7a0b\u5206\u4e3a\u624b\u52a8\u89e6\u53d1\u548c\u81ea\u52a8\u89e6\u53d1\u3002 <br \/>\n\u624b\u52a8\u89e6\u53d1\u5206\u522b\u5bf9\u5e94save\u548cbgsave\u547d\u4ee4\uff1a<\/p>\n<blockquote>\n<p>save\u547d\u4ee4\uff1a\u963b\u585e\u5f53\u524dRedis\u670d\u52a1\u5668\uff0c\u76f4\u5230RDB\u8fc7\u7a0b\u5b8c\u6210\u4e3a\u6b62\uff0c\u5bf9\u4e8e\u5185\u5b58\u6bd4\u8f83\u5927\u7684\u5b9e\u4f8b\u4f1a\u9020\u6210\u957f\u65f6\u95f4\u963b\u585e\uff0c\u7ebf\u4e0a\u73af\u5883\u4e0d\u5efa\u8bae\u4f7f\u7528\u3002 <br \/>\n  bgsave\u547d\u4ee4\uff1aRedis\u8fdb\u7a0b\u6267\u884cfork\u64cd\u4f5c\u521b\u5efa\u5b50\u8fdb\u7a0b\uff0cRDB\u6301\u4e45\u5316\u8fc7\u7a0b\u7531\u5b50\u8fdb\u7a0b\u8d1f\u8d23\uff0c\u5b8c\u6210\u540e\u81ea\u52a8\u7ed3\u675f\u3002\u963b\u585e\u53ea\u53d1\u751f\u5728fork\u9636\u6bb5\uff0c\u4e00\u822c\u65f6\u95f4\u5f88\u77ed\u3002<\/p>\n<\/blockquote>\n<p>\u9664\u4e86\u624b\u52a8\u89e6\u53d1\u4ee5\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528save\u547d\u4ee4\u81ea\u52a8\u89e6\u53d1<\/p>\n<div>\n<pre><code>###SNAPSHOTTING###\nsave 900 1\nsave 300 10\nsave 60 10000\n#@\u5f53900\u79d2\u5185\u67091\u4e2akey\u88ab\u4fee\u6539;\n#@\u6216\u8005\u5f53300\u79d2\u5185\u670910\u4e2akey\u88ab\u4fee\u6539;\n#@\u6216\u8005\u5f5360\u79d2\u5185\u670910000\u4e2akey\u88ab\u4fee\u6539\uff0c\u90fd\u4f1a\u89e6\u53d1\u5feb\u7167\u7684\u751f\u6210\u3002<\/code><\/pre>\n<\/div>\n<p>\u5728redis.conf\u6587\u4ef6\u4e2d\uff0c\u8fd8\u6709\u5982\u4e0b\u914d\u7f6e\u9879\uff1a<\/p>\n<div>\n<pre><code>stop-writes-on-bgsave-error yes\uff1a\u5f53\u540e\u53f0\u6700\u540e\u4e00\u6b21\u4fdd\u5b58\u51fa\u9519\uff0c\u505c\u6b62redis\u7684\u5199\u64cd\u4f5c\u3002\nrdbcompression yes\uff1a\u5f53\u8fdb\u884c\u6301\u4e45\u5316\u65f6\uff0c\u662f\u5426\u5bf9\u6570\u636e\u4f7f\u7528LZF\u7b97\u6cd5\u8fdb\u884c\u538b\u7f29\u3002\nrdbchecksum yes\uff1a\u5728\u5b58\u50a8\u5feb\u7167\u540e\uff0c\u662f\u5426\u4f7f\u7528CRC64\u7b97\u6cd5\u8fdb\u884c\u6570\u636e\u6821\u9a8c\u3002\ndbfilename dump.rdb\uff1a\u6307\u5b9a\u751f\u6210\u7684\u5feb\u7167\u6587\u4ef6\u540d\u4e3adump.rdb\u3002\ndir \/var\/lib\/redis\uff1a\u5b58\u50a8\u5feb\u7167\u6587\u4ef6\u7684\u8def\u5f84\u3002<\/code><\/pre>\n<\/div>\n<p>\u7981\u7528RBD<\/p>\n<div>\n<pre><code>#@\u6ce8\u91ca\u5176\u4ed6save\u9009\u9879\nsave \"\"<\/code><\/pre>\n<\/div>\n<h2 id=\"AOF\">AOF<\/h2>\n<p>AOF\u5373append only file\uff0c\u5728AOF\u6a21\u5f0f\u4e0b\uff0credis\u4f1a\u5c06\u6bcf\u4e00\u4e2a\u6536\u5230\u7684\u5199\u547d\u4ee4(\u5305\u62ecflushall\u547d\u4ee4)\u90fd\u901a\u8fc7write\u51fd\u6570\u8ffd\u52a0\u5230\u6587\u4ef6appendonly.aof\u4e2d\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0bredis\u5e76\u6ca1\u6709\u5f00\u542fAOF\uff0cAOF\u7684\u914d\u7f6e\u5728redis.conf\u4e2d\u6ce8\u91ca\u4e3aAPPEND ONLY MODE\u7684\u6a21\u5757\u91cc\uff0c\u5982\u679c\u8981\u5f00\u542fAOF\uff0c\u9700\u8981\u5c06appendonly no\u6539\u4e3aappendonly yes\u3002<\/p>\n<p>\u5de5\u4f5c\u6d41\u7a0b<\/p>\n<p>\uff081\uff09\u6240\u6709\u5199\u547d\u4ee4\u4f1a\u88ab\u8ffd\u52a0aof_buf(\u7f13\u51b2\u533a)\u4e2d <br \/>\n\uff082\uff09AOF\u7f13\u51b2\u533a\u6839\u636e\u5bf9\u5e94\u7684\u7b56\u7565\u5411\u786c\u76d8\u505a\u540c\u6b65\u64cd\u4f5c <br \/>\n\uff083\uff09\u968f\u7740AOF\u6587\u4ef6\u8d8a\u6765\u8d8a\u5927\uff0c\u9700\u8981\u5b9a\u671f\u5bf9AOF\u6587\u4ef6\u8fdb\u884c\u91cd\u5199,\u8fbe\u5230\u538b\u7f29\u7684\u76ee\u7684 <br \/>\n\uff084\uff09\u5f53 redis\u670d\u52a1\u5668\u8fdb\u884c\u91cd\u542f\u65f6\uff0c\u53ef\u4ee5\u52a0\u5728AOF\u6587\u4ef6\u8fdb\u884c\u6570\u636e\u6062\u590d<\/p>\n<p>Redis\u63d0\u4f9b\u4e86\u591a\u79cdAOF\u7f13\u51b2\u533a\u540c\u6b65\u6587\u4ef6\u7b56\u7565\uff0c\u7531\u53c2\u6570appendfsync\u63a7\u5236\u3002 <br \/>\napendfsync\u53c2\u6570\u7684\u9009\u9879\u5982\u4e0b\uff1a<\/p>\n<blockquote>\n<p>always:\u547d\u4ee4\u5199\u5165AOF\u7f13\u51b2\u533a\u540e\u8c03\u7528\u7cfb\u7edffsync\u64cd\u4f5c\u540c\u6b65\u5230AOF\u6587\u4ef6\u4e2d\uff0cfsync\u5b8c\u6210\u540e\u7ebf\u7a0b\u8fd4\u56de <br \/>\n  everysec\uff08\u9ed8\u8ba4\u914d\u7f6e\uff09\uff1a\u547d\u4ee4\u5199\u5165AOF\u7f13\u51b2\u533a\u540e\u8c03\u7528\u7cfb\u7edfwrite\u64cd\u4f5c\uff0cwrite\u5b8c\u6210\u540e\u7ebf\u7a0b\u8fd4\u56de\u3002fsync\u540c\u6b65\u6587\u4ef6\u64cd\u4f5c\u7531\u4e13\u95e8\u7ebf\u7a0b\u6bcf\u79d2\u8c03\u7528\u4e00\u6b21\u3002Everysec\u662f\u5efa\u8bae\u7684\u540c\u6b65\u7b56\u7565\u3002\u7406\u8bba\u4e0a\u53ea\u6709\u5728\u7cfb\u7edf\u7a81\u7136\u5b95\u673a\u7684\u60c5\u51b5\u4e0b\u4e22\u59311\u79d2\u7684\u6570\u636e\u3002 <br \/>\n  no\uff1a\u547d\u4ee4\u5199\u5165AOF\u7f13\u51b2\u533a\u540e\u8c03\u7528\u7cfb\u7edfwrite\u64cd\u4f5c\uff0cwrite\u5b8c\u6210\u540e\u7ebf\u7a0b\u540e\u7ebf\u7a0b\u8fd4\u56de\uff0c\u4e0d\u5bf9AOF\u6587\u4ef6\u4f5cfsync\u540c\u6b65\uff0c\u540c\u6b65\u786c\u76d8\u64cd\u4f5c\u7531\u64cd\u4f5c\u7cfb\u7edf\u8d1f\u8d23\uff0c\u901a\u5e38\u540c\u6b65\u5468\u671f\u6700\u957f30\u79d2\u3002<\/p>\n<\/blockquote>\n<p>\u968f\u7740\u547d\u4ee4\u4e0d\u65ad\u5199\u5165AOF\uff0c\u6587\u4ef6\u4f1a\u8d8a\u6765\u8d8a\u5927\uff0c\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0cRedis\u5f15\u5165AOF\u91cd\u5199\u673a\u5236\u538b\u7f29\u6587\u4ef6\u4f53\u79ef\u3002AOF\u6587\u4ef6\u91cd\u5199\u662f\u628aRedis\u8fdb\u7a0b\u5185\u7684\u6570\u636e\u8f6c\u5316\u4e3a\u5199\u547d\u4ee4\u540c\u6b65\u5230\u65b0AOF\u6587\u4ef6\u7684\u8fc7\u7a0b\u3002<\/p>\n<p>AOF\u91cd\u5199\u8fc7\u7a0b\u53ef\u4ee5\u624b\u52a8\u89e6\u53d1\u548c\u81ea\u52a8\u89e6\u53d1\uff1a<\/p>\n<blockquote>\n<p>\u624b\u52a8\u89e6\u53d1\uff1a\u76f4\u63a5\u8c03\u7528bgrewriteaof\u547d\u4ee4\u3002 <br \/>\n  \u81ea\u52a8\u89e6\u53d1\uff1a\u6839\u636eauto-aof-rewrite-min-size\u548cauto-aof-rewrite-percentage\u53c2\u6570\u786e\u5b9a\u81ea\u52a8\u89e6\u53d1\u65f6\u673a\u3002<\/p>\n<\/blockquote>\n<p>\u63d0\u793a\uff1a <br \/>\nRedis\u7684\u6301\u4e45\u5316\u662f\u53ef\u4ee5\u7981\u7528\u7684\uff0c\u4e24\u79cd\u65b9\u5f0f\u7684\u6301\u4e45\u5316\u662f\u53ef\u4ee5\u540c\u65f6\u5b58\u5728\u7684\uff0c\u4f46\u662f\u5f53Redis\u91cd\u542f\u65f6\uff0cAOF\u6587\u4ef6\u4f1a\u88ab\u4f18\u5148\u7528\u4e8e\u91cd\u5efa\u6570\u636e\u3002<\/p>\n<h2 id=\"\u53c2\u8003\u8d44\u6599\">\u53c2\u8003\u8d44\u6599<\/h2>\n<p><a href=\"http:\/\/www.h3399.cn\/201701\/34618.html\">http:\/\/www.h3399.cn\/201701\/34618.html<\/a><\/p>\n<p><a href=\"https:\/\/lanjingling.github.io\/2015\/11\/16\/redis-chijiuhua\/\">https:\/\/lanjingling.github.io\/2015\/11\/16\/redis-chijiuhua\/<\/a><\/p>\n<p><wiz_tmp_tag id=\"wiz-table-range-border\" contenteditable=\"false\" style=\"display: none;\"><\/p>\n<div id=\"wiz-table-col-line\" style=\"display: none;\"><\/div>\n<div id=\"wiz-table-row-line\" style=\"display: none;\"><\/div>\n<div id=\"wiz-table-range-border_start\" style=\"display: none;\">\n<div id=\"wiz-table-range-border_start_top\"><\/div>\n<div id=\"wiz-table-range-border_start_right\"><\/div>\n<div id=\"wiz-table-range-border_start_bottom\"><\/div>\n<div id=\"wiz-table-range-border_start_left\"><\/div>\n<div id=\"wiz-table-range-border_start_dot\"><\/div>\n<\/div>\n<div id=\"wiz-table-range-border_range\" style=\"display: none;\">\n<div id=\"wiz-table-range-border_range_top\"><\/div>\n<div id=\"wiz-table-range-border_range_right\"><\/div>\n<div id=\"wiz-table-range-border_range_bottom\"><\/div>\n<div id=\"wiz-table-range-border_range_left\"><\/div>\n<div id=\"wiz-table-range-border_range_dot\"><\/div>\n<\/div>\n<p><\/wiz_tmp_tag><\/p>\n<p>\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1a<a href=\"https:\/\/c.ipcpu.com\">IPCPU-\u7f51\u7edc\u4e4b\u8def<\/a> &raquo; <a href=\"https:\/\/c.ipcpu.com\/2017\/08\/redis-expire-out\/\">Redis\u4e13\u9898\u4e8c\u3001\u8fc7\u671f\u65f6\u95f4\u3001\u5185\u5b58\u9010\u51fa\u548c\u6570\u636e\u6301\u4e45\u5316<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Redis\u4e13\u9898\u4e8c\u3001\u8fc7\u671f\u65f6\u95f4\u3001\u5185\u5b58\u9010\u51fa\u548c\u6570\u636e\u6301\u4e45\u5316.md KEY\u7684\u8fc7\u671f\u65f6\u95f4 Redis\u53ef\u4ee5\u8bbe\u7f6e\u952e(KEY)\u7684\u8d85\u65f6\u65f6\u95f4\u3002\u547d\u4ee4\u662fexpire\uff0c\u67e5\u770b\u8d85\u65f6\u65f6\u95f4\u7684\u547d\u4ee4\u662fttl\u3002\u5982\u4e0b 127.0.0.1:6379&gt; set ipcpu:001 abcdefg OK 127.0.0.1:6379&gt; EXPIRE ipcpu:001 600 (integer) 1 127.0.0.1:6379&gt; ttl ipcpu:001 (integer) 590 127.0.0.1:6379&gt; ttl ipcpu:001 (integer) 582 Redis\u4f7f\u7528\u6700\u5927\u5185\u5b58\u548c\u9a71\u9010\u7b97\u6cd5 \u5728redis\u4e2d\uff0c\u5141\u8bb8\u7528\u6237\u8bbe\u7f6e\u6700\u5927\u4f7f\u7528\u5185\u5b58\u5927\u5c0fmaxmemory\uff08\u9700\u8981\u914d\u5408maxmemory-policy\u4f7f\u7528\uff09\uff0c\u8bbe\u7f6e\u4e3a0\u8868\u793a\u4e0d\u9650\u5236(\u9ed8\u8ba4\u914d\u7f6e)\u3002 \u751f\u4ea7\u73af\u5883\u4e2d\u9700\u8981\u8bbe\u7f6e\u6b64\u503c\uff0c\u6700\u597d\u4e0d\u8d85\u8fc7\u5185\u5b5860%-70%\u3002 \u5f53redis\u5185\u5b58\u6570\u636e\u96c6\u5feb\u5230\u8fbemaxmemory\u65f6\uff0credis\u4f1a\u5b9e\u884c\u6570\u636e\u6dd8\u6c70\u7b56\u7565\u3002Redis\u63d0\u4f9b6\u79cd\u6570\u636e\u6dd8\u6c70\u7b56\u7565\uff1a volatile-lru -&gt; remove the key with an expire set using an LRU algorithm #@\u6309\u7167LRU\u7b97\u6cd5\u9010\u51fa\u539f\u6709\u6570\u636e\uff0c\u4f46\u4ec5\u9010\u51fa\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684\u6570\u636e allkeys-lru -&gt; remove any key according to the LRU algorithm #@\u6309\u7167LRU\u7b97\u6cd5\u9010\u51fa\u539f\u6709\u6570\u636e volatile-random -&gt; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3,13],"tags":[142],"_links":{"self":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts\/944"}],"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=944"}],"version-history":[{"count":0,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts\/944\/revisions"}],"wp:attachment":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/media?parent=944"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/categories?post=944"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/tags?post=944"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}