{"id":163883,"date":"2024-11-05T03:13:26","date_gmt":"2024-11-04T19:13:26","guid":{"rendered":"https:\/\/server.hk\/cnblog\/163883\/"},"modified":"2024-11-05T03:13:27","modified_gmt":"2024-11-04T19:13:27","slug":"%e8%a7%a3%e6%b1%ba%e5%95%8f%e9%a1%8c%e6%b8%85%e9%99%a4redis%e4%b8%ad%e9%81%8e%e6%9c%9f%e6%95%b8%e6%93%9a%ef%bc%88%e6%b8%85%e7%a9%baredis%e9%81%8e%e6%9c%9f%e6%99%82%e9%96%93%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/163883\/","title":{"rendered":"\u89e3\u6c7a\u554f\u984c\u6e05\u9664Redis\u4e2d\u904e\u671f\u6578\u64da\uff08\u6e05\u7a7aredis\u904e\u671f\u6642\u9593\uff09"},"content":{"rendered":"<h1 id=\"%e8%a7%a3%e6%b1%ba%e5%95%8f%e9%a1%8c%e6%b8%85%e9%99%a4redis%e4%b8%ad%e9%81%8e%e6%9c%9f%e6%95%b8%e6%93%9a%ef%bc%88%e6%b8%85%e7%a9%baredis%e9%81%8e%e6%9c%9f%e6%99%82%e9%96%93%ef%bc%89-fkCwoxfRRr\">\u89e3\u6c7a\u554f\u984c\u6e05\u9664Redis\u4e2d\u904e\u671f\u6578\u64da\uff08\u6e05\u7a7aredis\u904e\u671f\u6642\u9593\uff09<\/h1>\n<p>Redis\u662f\u4e00\u7a2e\u9ad8\u6548\u7684\u9375\u503c\u6578\u64da\u5eab\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u6578\u64da\u5b58\u5132\u7b49\u5834\u666f\u3002\u7531\u65bc\u5176\u9ad8\u6027\u80fd\u548c\u9748\u6d3b\u6027\uff0cRedis\u5728\u8a31\u591a\u61c9\u7528\u4e2d\u626e\u6f14\u8457\u91cd\u8981\u89d2\u8272\u3002\u7136\u800c\uff0c\u96a8\u8457\u6642\u9593\u7684\u63a8\u79fb\uff0cRedis\u4e2d\u53ef\u80fd\u6703\u7a4d\u7d2f\u5927\u91cf\u904e\u671f\u6578\u64da\uff0c\u9019\u4e0d\u50c5\u6d6a\u8cbb\u4e86\u5b58\u5132\u7a7a\u9593\uff0c\u9084\u53ef\u80fd\u5f71\u97ff\u7cfb\u7d71\u6027\u80fd\u3002\u56e0\u6b64\uff0c\u4e86\u89e3\u5982\u4f55\u6709\u6548\u6e05\u9664Redis\u4e2d\u7684\u904e\u671f\u6578\u64da\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<h2 id=\"redis%e7%9a%84%e9%81%8e%e6%9c%9f%e6%a9%9f%e5%88%b6-fkCwoxfRRr\">Redis\u7684\u904e\u671f\u6a5f\u5236<\/h2>\n<p>Redis\u63d0\u4f9b\u4e86\u8a2d\u7f6e\u9375\u904e\u671f\u6642\u9593\u7684\u529f\u80fd\uff0c\u9019\u4f7f\u5f97\u7528\u6236\u53ef\u4ee5\u5728\u4e00\u5b9a\u6642\u9593\u5f8c\u81ea\u52d5\u522a\u9664\u4e0d\u518d\u9700\u8981\u7684\u6578\u64da\u3002\u7576\u4e00\u500b\u9375\u88ab\u8a2d\u7f6e\u4e86\u904e\u671f\u6642\u9593\u5f8c\uff0cRedis\u6703\u5728\u8a72\u6642\u9593\u5230\u9054\u6642\u81ea\u52d5\u5c07\u5176\u522a\u9664\u3002\u9019\u4e00\u904e\u7a0b\u662f\u7531Redis\u7684\u5167\u90e8\u6a5f\u5236\u81ea\u52d5\u7ba1\u7406\u7684\uff0c\u4e3b\u8981\u6709\u5169\u7a2e\u65b9\u5f0f\uff1a<\/p>\n<ul>\n<li><strong>\u5b9a\u671f\u522a\u9664\uff1a<\/strong>Redis\u6703\u5b9a\u671f\u6aa2\u67e5\u904e\u671f\u9375\uff0c\u4e26\u5c07\u5176\u522a\u9664\u3002\u9019\u500b\u904e\u7a0b\u901a\u5e38\u662f\u6bcf100\u6beb\u79d2\u9032\u884c\u4e00\u6b21\u3002<\/li>\n<li><strong>\u60f0\u6027\u522a\u9664\uff1a<\/strong>\u7576\u7528\u6236\u8a2a\u554f\u4e00\u500b\u904e\u671f\u7684\u9375\u6642\uff0cRedis\u6703\u7acb\u5373\u5c07\u5176\u522a\u9664\u3002<\/li>\n<\/ul>\n<p>\u5118\u7ba1Redis\u6709\u81ea\u52d5\u6e05\u9664\u904e\u671f\u6578\u64da\u7684\u6a5f\u5236\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u904e\u671f\u6578\u64da\u7684\u6e05\u9664\u53ef\u80fd\u4e0d\u5920\u53ca\u6642\uff0c\u9019\u5c31\u9700\u8981\u7528\u6236\u624b\u52d5\u4ecb\u5165\u3002<\/p>\n<h2 id=\"%e6%89%8b%e5%8b%95%e6%b8%85%e9%99%a4%e9%81%8e%e6%9c%9f%e6%95%b8%e6%93%9a%e7%9a%84%e6%96%b9%e6%b3%95-fkCwoxfRRr\">\u624b\u52d5\u6e05\u9664\u904e\u671f\u6578\u64da\u7684\u65b9\u6cd5<\/h2>\n<p>\u5982\u679c\u9700\u8981\u7acb\u5373\u6e05\u9664Redis\u4e2d\u7684\u904e\u671f\u6578\u64da\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8redis%e5%91%bd%e4%bb%a4-fkCwoxfRRr\">1. \u4f7f\u7528Redis\u547d\u4ee4<\/h3>\n<p>Redis\u63d0\u4f9b\u4e86\u591a\u500b\u547d\u4ee4\u4f86\u7ba1\u7406\u9375\u7684\u904e\u671f\u6642\u9593\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u547d\u4ee4\uff1a<\/p>\n<ul>\n<li><code>EXPIRE key seconds<\/code>\uff1a\u8a2d\u7f6e\u9375\u7684\u904e\u671f\u6642\u9593\u3002<\/li>\n<li><code>TTL key<\/code>\uff1a\u67e5\u8a62\u9375\u7684\u5269\u9918\u751f\u5b58\u6642\u9593\u3002<\/li>\n<li><code>DEL key<\/code>\uff1a\u624b\u52d5\u522a\u9664\u6307\u5b9a\u7684\u9375\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u60f3\u8981\u522a\u9664\u4e00\u500b\u540d\u70ba\u201csession:123\u201d\u7684\u9375\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>DEL session:123<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8redis%e7%9a%84keys%e5%91%bd%e4%bb%a4-fkCwoxfRRr\">2. \u4f7f\u7528Redis\u7684KEYS\u547d\u4ee4<\/h3>\n<p>\u5982\u679c\u9700\u8981\u6e05\u9664\u6240\u6709\u904e\u671f\u7684\u9375\uff0c\u53ef\u4ee5\u4f7f\u7528<code>KEYS<\/code>\u547d\u4ee4\u4f86\u7372\u53d6\u6240\u6709\u9375\uff0c\u7136\u5f8c\u9010\u4e00\u6aa2\u67e5\u5176\u904e\u671f\u6642\u9593\u4e26\u522a\u9664\uff1a<\/p>\n<pre><code>for key in redis.keys('*'):\n    if redis.ttl(key) == -2:  # -2\u8868\u793a\u9375\u5df2\u904e\u671f\n        redis.delete(key)<\/code><\/pre>\n<p>\u9019\u7a2e\u65b9\u6cd5\u96d6\u7136\u6709\u6548\uff0c\u4f46\u5728\u9375\u6578\u91cf\u8f03\u591a\u7684\u60c5\u6cc1\u4e0b\uff0c\u6027\u80fd\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\uff0c\u56e0\u6b64\u4e0d\u5efa\u8b70\u5728\u751f\u7522\u74b0\u5883\u4e2d\u983b\u7e41\u4f7f\u7528\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8redis%e7%9a%84scan%e5%91%bd%e4%bb%a4-fkCwoxfRRr\">3. \u4f7f\u7528Redis\u7684SCAN\u547d\u4ee4<\/h3>\n<p>\u76f8\u6bd4<code>KEYS<\/code>\u547d\u4ee4\uff0c<code>SCAN<\/code>\u547d\u4ee4\u66f4\u70ba\u9ad8\u6548\uff0c\u56e0\u70ba\u5b83\u4e0d\u6703\u4e00\u6b21\u6027\u8fd4\u56de\u6240\u6709\u9375\uff0c\u800c\u662f\u5206\u6279\u8fd4\u56de\u3002\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u5c0dRedis\u6027\u80fd\u7684\u5f71\u97ff\uff1a<\/p>\n<pre><code>cursor = 0\nwhile True:\n    cursor, keys = redis.scan(cursor)\n    for key in keys:\n        if redis.ttl(key) == -2:\n            redis.delete(key)\n    if cursor == 0:\n        break<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-fkCwoxfRRr\">\u7e3d\u7d50<\/h2>\n<p>\u6e05\u9664Redis\u4e2d\u7684\u904e\u671f\u6578\u64da\u662f\u4fdd\u6301\u7cfb\u7d71\u6027\u80fd\u548c\u8cc7\u6e90\u5229\u7528\u7387\u7684\u91cd\u8981\u6b65\u9a5f\u3002\u901a\u904e\u4f7f\u7528Redis\u63d0\u4f9b\u7684\u547d\u4ee4\u548c\u5de5\u5177\uff0c\u7528\u6236\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u6e05\u7406\u904e\u671f\u6578\u64da\u3002\u7121\u8ad6\u662f\u4f7f\u7528<code>DEL<\/code>\u3001<code>KEYS<\/code>\u9084\u662f<code>SCAN<\/code>\u547d\u4ee4\uff0c\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u66f4\u597d\u5730\u7dad\u8b77\u5176\u6578\u64da\u5eab\u7684\u5065\u5eb7\u72c0\u614b\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\u914d\u7f6e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u6709\u6548\u6e05\u9664Redis\u4e2d\u904e\u671f\u6578\u64da\uff0c\u512a\u5316\u6027\u80fd\u4e26\u91cb\u653e\u5b58\u5132\u7a7a\u9593\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u904b\u884c\u6d41\u66a2\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-163883","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163883","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=163883"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163883\/revisions"}],"predecessor-version":[{"id":163884,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163883\/revisions\/163884"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=163883"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=163883"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=163883"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}