{"id":188912,"date":"2024-11-12T02:57:29","date_gmt":"2024-11-11T18:57:29","guid":{"rendered":"https:\/\/server.hk\/cnblog\/188912\/"},"modified":"2024-11-12T02:57:30","modified_gmt":"2024-11-11T18:57:30","slug":"%e6%b7%98%e6%b1%b0%e7%ad%96%e7%95%a5%e5%88%a9%e7%94%a8redis%e8%a7%a3%e6%b1%ba%e7%a3%81%e7%a2%9f%e7%a9%ba%e9%96%93%e5%95%8f%e9%a1%8c%e7%9a%84%e8%87%aa%e5%ae%9a%e7%be%a9%e6%b7%98%e6%b1%b0%e7%ad%96","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/188912\/","title":{"rendered":"\u6dd8\u6c70\u7b56\u7565\u5229\u7528Redis\u89e3\u6c7a\u78c1\u789f\u7a7a\u9593\u554f\u984c\u7684\u81ea\u5b9a\u7fa9\u6dd8\u6c70\u7b56\u7565\uff08redis \u81ea\u5b9a\u7fa9\u78c1\u789f\uff09"},"content":{"rendered":"<h1 id=\"%e6%b7%98%e6%b1%b0%e7%ad%96%e7%95%a5%e5%88%a9%e7%94%a8redis%e8%a7%a3%e6%b1%ba%e7%a3%81%e7%a2%9f%e7%a9%ba%e9%96%93%e5%95%8f%e9%a1%8c%e7%9a%84%e8%87%aa%e5%ae%9a%e7%be%a9%e6%b7%98%e6%b1%b0%e7%ad%96-TeYTnzoBqF\">\u6dd8\u6c70\u7b56\u7565\u5229\u7528Redis\u89e3\u6c7a\u78c1\u789f\u7a7a\u9593\u554f\u984c\u7684\u81ea\u5b9a\u7fa9\u6dd8\u6c70\u7b56\u7565<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5b58\u5132\u548c\u7ba1\u7406\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u5eab\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u5834\u666f\u4e2d\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u5feb\u901f\u8b80\u53d6\u548c\u5beb\u5165\u7684\u61c9\u7528\u4e2d\u3002\u7136\u800c\uff0c\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u5982\u4f55\u6709\u6548\u7ba1\u7406\u78c1\u789f\u7a7a\u9593\u6210\u70ba\u4e86\u4e00\u500b\u91cd\u8981\u7684\u8ab2\u984c\u3002\u672c\u6587\u5c07\u63a2\u8a0eRedis\u7684\u81ea\u5b9a\u7fa9\u6dd8\u6c70\u7b56\u7565\uff0c\u5e6b\u52a9\u7528\u6236\u89e3\u6c7a\u78c1\u789f\u7a7a\u9593\u554f\u984c\u3002<\/p>\n<h2 id=\"redis%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-TeYTnzoBqF\">Redis\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>Redis\u662f\u4e00\u500b\u958b\u6e90\u7684\u9ad8\u6027\u80fd\u9375\u503c\u6578\u64da\u5eab\uff0c\u652f\u6301\u591a\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u5982\u5b57\u7b26\u4e32\u3001\u54c8\u5e0c\u3001\u5217\u8868\u3001\u96c6\u5408\u7b49\u3002\u5b83\u7684\u4e3b\u8981\u7279\u9ede\u662f\u5feb\u901f\u7684\u6578\u64da\u5b58\u53d6\u548c\u9ad8\u6548\u7684\u5167\u5b58\u7ba1\u7406\u3002Redis\u901a\u5e38\u7528\u65bc\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u5be6\u6642\u6578\u64da\u5206\u6790\u7b49\u5834\u666f\u3002<\/p>\n<h2 id=\"%e7%a3%81%e7%a2%9f%e7%a9%ba%e9%96%93%e5%95%8f%e9%a1%8c%e7%9a%84%e6%8c%91%e6%88%b0-TeYTnzoBqF\">\u78c1\u789f\u7a7a\u9593\u554f\u984c\u7684\u6311\u6230<\/h2>\n<p>\u96a8\u8457\u61c9\u7528\u7a0b\u5e8f\u7684\u767c\u5c55\uff0c\u6578\u64da\u91cf\u7684\u589e\u52a0\u53ef\u80fd\u6703\u5c0e\u81f4\u78c1\u789f\u7a7a\u9593\u4e0d\u8db3\u3002\u9019\u4e0d\u50c5\u5f71\u97ff\u7cfb\u7d71\u7684\u6027\u80fd\uff0c\u9084\u53ef\u80fd\u5c0e\u81f4\u6578\u64da\u4e1f\u5931\u6216\u61c9\u7528\u5d29\u6f70\u3002\u56e0\u6b64\uff0c\u5408\u7406\u7684\u6578\u64da\u7ba1\u7406\u7b56\u7565\u81f3\u95dc\u91cd\u8981\u3002Redis\u63d0\u4f9b\u4e86\u591a\u7a2e\u6dd8\u6c70\u7b56\u7565\u4f86\u5e6b\u52a9\u7528\u6236\u7ba1\u7406\u5167\u5b58\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u9019\u4e9b\u9810\u8a2d\u7b56\u7565\u53ef\u80fd\u7121\u6cd5\u6eff\u8db3\u7279\u5b9a\u9700\u6c42\u3002<\/p>\n<h2 id=\"redis%e7%9a%84%e9%a0%90%e8%a8%ad%e6%b7%98%e6%b1%b0%e7%ad%96%e7%95%a5-TeYTnzoBqF\">Redis\u7684\u9810\u8a2d\u6dd8\u6c70\u7b56\u7565<\/h2>\n<p>Redis\u63d0\u4f9b\u4e86\u5e7e\u7a2e\u9810\u8a2d\u7684\u6dd8\u6c70\u7b56\u7565\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>noeviction<\/strong>\uff1a\u7576\u5167\u5b58\u9054\u5230\u4e0a\u9650\u6642\uff0c\u62d2\u7d55\u5beb\u5165\u64cd\u4f5c\u3002<\/li>\n<li><strong>allkeys-lru<\/strong>\uff1a\u5f9e\u6240\u6709\u9375\u4e2d\u9078\u64c7\u6700\u8fd1\u6700\u5c11\u4f7f\u7528\u7684\u9375\u9032\u884c\u6dd8\u6c70\u3002<\/li>\n<li><strong>volatile-lru<\/strong>\uff1a\u50c5\u5f9e\u8a2d\u7f6e\u4e86\u904e\u671f\u6642\u9593\u7684\u9375\u4e2d\u9078\u64c7\u6700\u8fd1\u6700\u5c11\u4f7f\u7528\u7684\u9375\u9032\u884c\u6dd8\u6c70\u3002<\/li>\n<li><strong>allkeys-random<\/strong>\uff1a\u96a8\u6a5f\u9078\u64c7\u4e00\u500b\u9375\u9032\u884c\u6dd8\u6c70\u3002<\/li>\n<li><strong>volatile-random<\/strong>\uff1a\u96a8\u6a5f\u9078\u64c7\u4e00\u500b\u8a2d\u7f6e\u4e86\u904e\u671f\u6642\u9593\u7684\u9375\u9032\u884c\u6dd8\u6c70\u3002<\/li>\n<li><strong>volatile-ttl<\/strong>\uff1a\u6839\u64da\u904e\u671f\u6642\u9593\u9078\u64c7\u5373\u5c07\u904e\u671f\u7684\u9375\u9032\u884c\u6dd8\u6c70\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%87%aa%e5%ae%9a%e7%be%a9%e6%b7%98%e6%b1%b0%e7%ad%96%e7%95%a5%e7%9a%84%e5%bf%85%e8%a6%81%e6%80%a7-TeYTnzoBqF\">\u81ea\u5b9a\u7fa9\u6dd8\u6c70\u7b56\u7565\u7684\u5fc5\u8981\u6027<\/h2>\n<p>\u96d6\u7136Redis\u7684\u9810\u8a2d\u6dd8\u6c70\u7b56\u7565\u80fd\u5920\u6eff\u8db3\u5927\u591a\u6578\u9700\u6c42\uff0c\u4f46\u5728\u67d0\u4e9b\u7279\u5b9a\u5834\u666f\u4e0b\uff0c\u7528\u6236\u53ef\u80fd\u9700\u8981\u66f4\u9748\u6d3b\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u4f8b\u5982\uff0c\u67d0\u4e9b\u61c9\u7528\u53ef\u80fd\u9700\u8981\u6839\u64da\u6578\u64da\u7684\u91cd\u8981\u6027\u6216\u4f7f\u7528\u983b\u7387\u4f86\u6c7a\u5b9a\u6dd8\u6c70\u7684\u512a\u5148\u7d1a\u3002\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u81ea\u5b9a\u7fa9\u6dd8\u6c70\u7b56\u7565\u5c31\u986f\u5f97\u5c24\u70ba\u91cd\u8981\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%be%e8%87%aa%e5%ae%9a%e7%be%a9%e6%b7%98%e6%b1%b0%e7%ad%96%e7%95%a5-TeYTnzoBqF\">\u5982\u4f55\u5be6\u73fe\u81ea\u5b9a\u7fa9\u6dd8\u6c70\u7b56\u7565<\/h2>\n<p>\u8981\u5be6\u73fe\u81ea\u5b9a\u7fa9\u6dd8\u6c70\u7b56\u7565\uff0c\u9996\u5148\u9700\u8981\u4e86\u89e3Redis\u7684\u6578\u64da\u7d50\u69cb\u548c\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528Redis\u7684Lua\u8173\u672c\u4f86\u5be6\u73fe\u81ea\u5b9a\u7fa9\u7684\u6dd8\u6c70\u908f\u8f2f\uff1a<\/p>\n<pre><code>\n-- \u81ea\u5b9a\u7fa9\u6dd8\u6c70\u7b56\u7565\u793a\u4f8b\nlocal keys = redis.call('KEYS', '*')\nlocal to_evict = {}\n\nfor i=1, #keys do\n    local key = keys[i]\n    local usage_count = redis.call('GET', key .. ':usage_count') or 0\n    if usage_count &lt; threshold then\n        table.insert(to_evict, key)\n    end\nend\n\nfor i=1, #to_evict do\n    redis.call(&#039;DEL&#039;, to_evict[i])\nend\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u7372\u53d6\u6240\u6709\u9375\uff0c\u7136\u5f8c\u6839\u64da\u4f7f\u7528\u6b21\u6578\u6c7a\u5b9a\u54ea\u4e9b\u9375\u9700\u8981\u88ab\u6dd8\u6c70\u3002\u9019\u6a23\u7684\u81ea\u5b9a\u7fa9\u7b56\u7565\u53ef\u4ee5\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9032\u884c\u8abf\u6574\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-TeYTnzoBqF\">\u7d50\u8ad6<\/h2>\n<p>\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u5408\u7406\u7684\u6578\u64da\u7ba1\u7406\u7b56\u7565\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002Redis\u63d0\u4f9b\u7684\u81ea\u5b9a\u7fa9\u6dd8\u6c70\u7b56\u7565\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9748\u6d3b\u7ba1\u7406\u78c1\u789f\u7a7a\u9593\u3002\u901a\u904e\u5be6\u73fe\u81ea\u5b9a\u7fa9\u7684\u6dd8\u6c70\u908f\u8f2f\uff0c\u7528\u6236\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u63a7\u5236\u6578\u64da\u7684\u5b58\u5132\u548c\u4f7f\u7528\uff0c\u5f9e\u800c\u63d0\u9ad8\u7cfb\u7d71\u7684\u6574\u9ad4\u6027\u80fd\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u7ba1\u7406\u60a8\u7684\u6578\u64da\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u670d\u52d9\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u61c9\u7528\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u548c\u9748\u6d3b\u7684\u8cc7\u6e90\u7ba1\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u5229\u7528Redis\u81ea\u5b9a\u7fa9\u6dd8\u6c70\u7b56\u7565\uff0c\u6709\u6548\u89e3\u6c7a\u78c1\u789f\u7a7a\u9593\u554f\u984c\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\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-188912","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188912","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=188912"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188912\/revisions"}],"predecessor-version":[{"id":188913,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188912\/revisions\/188913"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=188912"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=188912"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=188912"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}