{"id":125667,"date":"2024-10-26T00:09:40","date_gmt":"2024-10-25T16:09:40","guid":{"rendered":"https:\/\/server.hk\/cnblog\/125667\/"},"modified":"2024-10-26T00:09:41","modified_gmt":"2024-10-25T16:09:41","slug":"redis-%e5%88%a9%e7%94%a8-lru-%e6%b7%98%e6%b1%b0%e9%81%8e%e6%9c%9f%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/125667\/","title":{"rendered":"Redis \u5229\u7528 LRU \u6dd8\u6c70\u904e\u671f\u6578\u64da"},"content":{"rendered":"<h1 id=\"redis-%e5%88%a9%e7%94%a8-lru-%e6%b7%98%e6%b1%b0%e9%81%8e%e6%9c%9f%e6%95%b8%e6%93%9a-gXAicbNvdn\">Redis \u5229\u7528 LRU \u6dd8\u6c70\u904e\u671f\u6578\u64da<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u7684\u5b58\u5132\u548c\u7ba1\u7406\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002Redis \u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u7d50\u69cb\u548c\u529f\u80fd\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u5229\u7528 LRU\uff08Least Recently Used\uff09\u7b97\u6cd5\u4f86\u6dd8\u6c70\u904e\u671f\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e Redis \u7684 LRU \u6dd8\u6c70\u6a5f\u5236\u53ca\u5176\u5be6\u73fe\u65b9\u5f0f\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-lru-%e7%ae%97%e6%b3%95%ef%bc%9f-gXAicbNvdn\">\u4ec0\u9ebc\u662f LRU \u7b97\u6cd5\uff1f<\/h2>\n<p>LRU\uff08\u6700\u8fd1\u6700\u5c11\u4f7f\u7528\uff09\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u7de9\u5b58\u6dd8\u6c70\u7b97\u6cd5\uff0c\u65e8\u5728\u4fdd\u6301\u6700\u5e38\u4f7f\u7528\u7684\u6578\u64da\u5728\u5167\u5b58\u4e2d\uff0c\u800c\u5c07\u4e0d\u5e38\u4f7f\u7528\u7684\u6578\u64da\u79fb\u9664\u3002\u9019\u7a2e\u7b97\u6cd5\u7684\u57fa\u672c\u539f\u5247\u662f\uff1a\u5982\u679c\u4e00\u500b\u6578\u64da\u5728\u6700\u8fd1\u4e00\u6bb5\u6642\u9593\u5167\u6c92\u6709\u88ab\u4f7f\u7528\uff0c\u90a3\u9ebc\u5b83\u5728\u672a\u4f86\u88ab\u4f7f\u7528\u7684\u53ef\u80fd\u6027\u4e5f\u6703\u8f03\u4f4e\u3002<\/p>\n<h2 id=\"redis-%e4%b8%ad%e7%9a%84-lru-%e6%b7%98%e6%b1%b0%e7%ad%96%e7%95%a5-gXAicbNvdn\">Redis \u4e2d\u7684 LRU \u6dd8\u6c70\u7b56\u7565<\/h2>\n<p>\u5728 Redis \u4e2d\uff0cLRU \u662f\u4e00\u7a2e\u53ef\u9078\u7684\u6578\u64da\u6dd8\u6c70\u7b56\u7565\uff0c\u7576 Redis \u7684\u5167\u5b58\u9054\u5230\u8a2d\u5b9a\u7684\u9650\u5236\u6642\uff0c\u6703\u6839\u64da LRU \u7b97\u6cd5\u81ea\u52d5\u522a\u9664\u6700\u5c11\u4f7f\u7528\u7684\u9375\u3002\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u5730\u91cb\u653e\u5167\u5b58\uff0c\u78ba\u4fdd\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002<\/p>\n<h3 id=\"%e9%85%8d%e7%bd%ae-lru-%e6%b7%98%e6%b1%b0%e7%ad%96%e7%95%a5-gXAicbNvdn\">\u914d\u7f6e LRU \u6dd8\u6c70\u7b56\u7565<\/h3>\n<p>\u8981\u555f\u7528 LRU \u6dd8\u6c70\u7b56\u7565\uff0c\u60a8\u9700\u8981\u5728 Redis \u7684\u914d\u7f6e\u6587\u4ef6\u4e2d\u9032\u884c\u8a2d\u7f6e\u3002\u4ee5\u4e0b\u662f\u76f8\u95dc\u7684\u914d\u7f6e\u9078\u9805\uff1a<\/p>\n<pre><code>\nmaxmemory \nmaxmemory-policy allkeys-lru\n<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>maxmemory<\/code> \u7528\u65bc\u8a2d\u7f6e Redis \u53ef\u4ee5\u4f7f\u7528\u7684\u6700\u5927\u5167\u5b58\u91cf\uff0c\u800c <code>maxmemory-policy<\/code> \u5247\u6307\u5b9a\u4e86\u6dd8\u6c70\u7b56\u7565\u3002\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u9078\u64c7\u4e86 <code>allkeys-lru<\/code>\uff0c\u9019\u610f\u5473\u8457\u6240\u6709\u9375\u90fd\u53ef\u4ee5\u88ab LRU \u6dd8\u6c70\u3002<\/p>\n<h3 id=\"lru-%e7%9a%84%e5%af%a6%e7%8f%be%e6%96%b9%e5%bc%8f-gXAicbNvdn\">LRU \u7684\u5be6\u73fe\u65b9\u5f0f<\/h3>\n<p>Redis \u4f7f\u7528\u4e00\u7a2e\u9ad8\u6548\u7684\u6578\u64da\u7d50\u69cb\u4f86\u5be6\u73fe LRU \u7b97\u6cd5\u3002\u5177\u9ad4\u4f86\u8aaa\uff0cRedis \u5167\u90e8\u7dad\u8b77\u4e86\u4e00\u500b\u96d9\u5411\u93c8\u8868\uff0c\u7576\u4e00\u500b\u9375\u88ab\u8a2a\u554f\u6642\uff0c\u5b83\u6703\u88ab\u79fb\u52d5\u5230\u93c8\u8868\u7684\u982d\u90e8\uff0c\u800c\u7576\u5167\u5b58\u9700\u8981\u91cb\u653e\u6642\uff0c\u93c8\u8868\u5c3e\u90e8\u7684\u9375\u5c07\u88ab\u522a\u9664\u3002\u9019\u6a23\u7684\u8a2d\u8a08\u4f7f\u5f97 LRU \u7684\u64cd\u4f5c\u6642\u9593\u8907\u96dc\u5ea6\u70ba O(1)\uff0c\u5373\u4f7f\u5728\u9ad8\u4e26\u767c\u7684\u60c5\u6cc1\u4e0b\u4e5f\u80fd\u4fdd\u6301\u826f\u597d\u7684\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-lru-%e7%9a%84%e5%84%aa%e5%8b%a2-gXAicbNvdn\">\u4f7f\u7528 LRU \u7684\u512a\u52e2<\/h2>\n<ul>\n<li><strong>\u63d0\u9ad8\u6027\u80fd\uff1a<\/strong>\u901a\u904e\u81ea\u52d5\u6dd8\u6c70\u4e0d\u5e38\u7528\u7684\u6578\u64da\uff0cRedis \u53ef\u4ee5\u4fdd\u6301\u9ad8\u6548\u7684\u5167\u5b58\u4f7f\u7528\uff0c\u5f9e\u800c\u63d0\u9ad8\u6574\u9ad4\u6027\u80fd\u3002<\/li>\n<li><strong>\u7c21\u5316\u7ba1\u7406\uff1a<\/strong>\u7528\u6236\u7121\u9700\u624b\u52d5\u7ba1\u7406\u5167\u5b58\uff0cRedis \u81ea\u52d5\u8655\u7406\u6578\u64da\u7684\u6dd8\u6c70\uff0c\u6e1b\u5c11\u4e86\u7ba1\u7406\u7684\u8907\u96dc\u6027\u3002<\/li>\n<li><strong>\u9748\u6d3b\u6027\uff1a<\/strong>\u7528\u6236\u53ef\u4ee5\u6839\u64da\u5be6\u969b\u9700\u6c42\u8abf\u6574\u5167\u5b58\u9650\u5236\u548c\u6dd8\u6c70\u7b56\u7565\uff0c\u4ee5\u9069\u61c9\u4e0d\u540c\u7684\u61c9\u7528\u5834\u666f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e6%a1%88%e4%be%8b-gXAicbNvdn\">\u5be6\u969b\u61c9\u7528\u6848\u4f8b<\/h2>\n<p>\u8a31\u591a\u4f01\u696d\u5728\u4f7f\u7528 Redis \u4f5c\u70ba\u7de9\u5b58\u5c64\u6642\uff0c\u9078\u64c7\u4e86 LRU \u6dd8\u6c70\u7b56\u7565\u3002\u4f8b\u5982\uff0c\u4e00\u500b\u96fb\u5b50\u5546\u52d9\u5e73\u53f0\u53ef\u80fd\u6703\u5c07\u7528\u6236\u7684\u8cfc\u7269\u8eca\u6578\u64da\u5b58\u5132\u5728 Redis \u4e2d\u3002\u96a8\u8457\u7528\u6236\u7684\u589e\u9577\uff0c\u8cfc\u7269\u8eca\u6578\u64da\u7684\u6578\u91cf\u4e5f\u6703\u589e\u52a0\u3002\u901a\u904e\u4f7f\u7528 LRU \u7b56\u7565\uff0c\u7cfb\u7d71\u53ef\u4ee5\u81ea\u52d5\u522a\u9664\u4e0d\u6d3b\u8e8d\u7528\u6236\u7684\u8cfc\u7269\u8eca\u6578\u64da\uff0c\u5f9e\u800c\u91cb\u653e\u5167\u5b58\u4e26\u4fdd\u6301\u7cfb\u7d71\u7684\u9ad8\u6548\u904b\u884c\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-gXAicbNvdn\">\u7d50\u8ad6<\/h2>\n<p>Redis \u7684 LRU \u6dd8\u6c70\u7b56\u7565\u662f\u4e00\u7a2e\u9ad8\u6548\u7684\u5167\u5b58\u7ba1\u7406\u65b9\u6cd5\uff0c\u80fd\u5920\u81ea\u52d5\u8655\u7406\u4e0d\u5e38\u7528\u6578\u64da\u7684\u522a\u9664\uff0c\u5f9e\u800c\u63d0\u9ad8\u7cfb\u7d71\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002\u901a\u904e\u5408\u7406\u914d\u7f6e\u548c\u4f7f\u7528 LRU\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u597d\u5730\u7ba1\u7406\u5167\u5b58\uff0c\u78ba\u4fdd\u61c9\u7528\u7a0b\u5e8f\u7684\u6d41\u66a2\u904b\u884c\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u548c\u5176\u4ed6\u670d\u52d9\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Redis \u4f7f\u7528 LRU \u7b97\u6cd5\u6709\u6548\u7ba1\u7406\u5167\u5b58\uff0c\u81ea\u52d5\u6dd8\u6c70\u904e\u671f\u6578\u64da\uff0c\u78ba\u4fdd\u9ad8\u6548\u6027\u80fd\u8207\u8cc7\u6e90\u5229\u7528\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-125667","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/125667","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=125667"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/125667\/revisions"}],"predecessor-version":[{"id":125668,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/125667\/revisions\/125668"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=125667"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=125667"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=125667"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}