{"id":129343,"date":"2024-10-26T20:54:20","date_gmt":"2024-10-26T12:54:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/129343\/"},"modified":"2024-10-26T20:54:21","modified_gmt":"2024-10-26T12:54:21","slug":"redis%e9%8e%96%e6%a9%9f%e5%88%b6%e4%bf%9d%e8%ad%89%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6%e6%a9%9f%e5%88%b6%e9%ab%98%e6%95%88%e9%81%8b%e8%a1%8c%ef%bc%88redis%e9%8e%96-gc%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/129343\/","title":{"rendered":"Redis\u9396\u6a5f\u5236\u4fdd\u8b49\u5783\u573e\u56de\u6536\u6a5f\u5236\u9ad8\u6548\u904b\u884c\uff08redis\u9396 gc\uff09"},"content":{"rendered":"

Redis\u9396\u6a5f\u5236\u4fdd\u8b49\u5783\u573e\u56de\u6536\u6a5f\u5236\u9ad8\u6548\u904b\u884c\uff08redis\u9396 gc\uff09<\/h1>\n

\u5728\u7576\u4eca\u7684\u61c9\u7528\u7a0b\u5f0f\u958b\u767c\u4e2d\uff0cRedis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u6578\u64da\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u5be6\u6642\u6578\u64da\u8655\u7406\u7b49\u5834\u666f\u3002\u96a8\u8457\u61c9\u7528\u7684\u589e\u9577\uff0c\u5982\u4f55\u6709\u6548\u7ba1\u7406\u5167\u5b58\u548c\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u6210\u70ba\u4e86\u958b\u767c\u8005\u9762\u81e8\u7684\u91cd\u8981\u6311\u6230\u3002\u672c\u6587\u5c07\u63a2\u8a0eRedis\u7684\u9396\u6a5f\u5236\u5982\u4f55\u4fdd\u8b49\u5783\u573e\u56de\u6536\uff08GC\uff09\u6a5f\u5236\u7684\u9ad8\u6548\u904b\u884c\u3002<\/p>\n

Redis\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n

Redis\u662f\u4e00\u500b\u958b\u6e90\u7684\u5167\u5b58\u6578\u64da\u7d50\u69cb\u5b58\u5132\u7cfb\u7d71\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\u9ad8\u6027\u80fd\u548c\u9748\u6d3b\u6027\u4f7f\u5176\u6210\u70ba\u8a31\u591a\u4f01\u696d\u7684\u9996\u9078\u3002\u7136\u800c\uff0c\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u52a0\uff0c\u5982\u4f55\u6709\u6548\u5730\u7ba1\u7406\u5167\u5b58\u548c\u9032\u884c\u5783\u573e\u56de\u6536\u6210\u70ba\u4e86\u95dc\u9375\u554f\u984c\u3002<\/p>\n

\u5783\u573e\u56de\u6536\u7684\u5fc5\u8981\u6027<\/h2>\n

\u5728Redis\u4e2d\uff0c\u5783\u573e\u56de\u6536\u4e3b\u8981\u662f\u6307\u91cb\u653e\u4e0d\u518d\u4f7f\u7528\u7684\u5167\u5b58\u7a7a\u9593\u3002\u96a8\u8457\u6642\u9593\u7684\u63a8\u79fb\uff0c\u61c9\u7528\u4e2d\u53ef\u80fd\u6703\u7522\u751f\u5927\u91cf\u7684\u904e\u671f\u6578\u64da\u6216\u4e0d\u518d\u9700\u8981\u7684\u6578\u64da\uff0c\u9019\u4e9b\u6578\u64da\u5982\u679c\u4e0d\u53ca\u6642\u6e05\u7406\uff0c\u5c07\u6703\u5c0e\u81f4\u5167\u5b58\u7684\u6d6a\u8cbb\uff0c\u751a\u81f3\u5f71\u97ff\u7cfb\u7d71\u7684\u6027\u80fd\u3002<\/p>\n

Redis\u7684\u9396\u6a5f\u5236<\/h2>\n

\u70ba\u4e86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u6b63\u78ba\u6027\uff0cRedis\u63d0\u4f9b\u4e86\u9396\u6a5f\u5236\u3002\u9396\u7684\u4e3b\u8981\u76ee\u7684\u662f\u9632\u6b62\u591a\u500b\u5ba2\u6236\u7aef\u540c\u6642\u5c0d\u540c\u4e00\u8cc7\u6e90\u9032\u884c\u64cd\u4f5c\uff0c\u5f9e\u800c\u907f\u514d\u6578\u64da\u7af6\u722d\u548c\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u767c\u751f\u3002<\/p>\n

\u5206\u5e03\u5f0f\u9396\u7684\u5be6\u73fe<\/h3>\n

Redis\u7684\u5206\u5e03\u5f0f\u9396\u901a\u5e38\u662f\u901a\u904eSETNX\u547d\u4ee4\u4f86\u5be6\u73fe\u7684\u3002SETNX\u547d\u4ee4\u7684\u5168\u540d\u662f\u201cSET if Not eXists\u201d\uff0c\u5b83\u7684\u4f5c\u7528\u662f\u53ea\u6709\u5728\u9375\u4e0d\u5b58\u5728\u7684\u60c5\u6cc1\u4e0b\u624d\u6703\u8a2d\u7f6e\u9375\u7684\u503c\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u53ea\u6709\u4e00\u500b\u5ba2\u6236\u7aef\u80fd\u5920\u7372\u5f97\u9396\u3002<\/p>\n

SETNX lock_key unique_lock_value\n<\/code><\/pre>\n
\u7576\u4e00\u500b\u5ba2\u6236\u7aef\u6210\u529f\u7372\u5f97\u9396\u5f8c\uff0c\u5b83\u53ef\u4ee5\u9032\u884c\u6578\u64da\u64cd\u4f5c\uff0c\u4e26\u5728\u64cd\u4f5c\u5b8c\u6210\u5f8c\u91cb\u653e\u9396\u3002\u91cb\u653e\u9396\u7684\u904e\u7a0b\u4e2d\uff0c\u5ba2\u6236\u7aef\u9700\u8981\u6aa2\u67e5\u9396\u7684\u64c1\u6709\u8005\uff0c\u4ee5\u9632\u6b62\u5176\u4ed6\u5ba2\u6236\u7aef\u8aa4\u91cb\u653e\u9396\u3002<\/p>\n
if (get(lock_key) == unique_lock_value) {\n    DEL lock_key\n}\n<\/code><\/pre>\n
\u9396\u6a5f\u5236\u8207\u5783\u573e\u56de\u6536\u7684\u95dc\u4fc2<\/h2>\n
\u5728Redis\u4e2d\uff0c\u9396\u6a5f\u5236\u8207\u5783\u573e\u56de\u6536\u5bc6\u5207\u76f8\u95dc\u3002\u7576\u4e00\u500b\u5ba2\u6236\u7aef\u7372\u5f97\u9396\u4e26\u9032\u884c\u6578\u64da\u64cd\u4f5c\u6642\uff0c\u5176\u4ed6\u5ba2\u6236\u7aef\u7121\u6cd5\u5c0d\u8a72\u6578\u64da\u9032\u884c\u64cd\u4f5c\uff0c\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u5728\u5783\u573e\u56de\u6536\u904e\u7a0b\u4e2d\u51fa\u73fe\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u3002<\/p>\n
\u4f8b\u5982\uff0c\u7576\u4e00\u500b\u5ba2\u6236\u7aef\u6b63\u5728\u522a\u9664\u904e\u671f\u6578\u64da\u6642\uff0c\u5982\u679c\u6c92\u6709\u9396\u7684\u4fdd\u8b77\uff0c\u5176\u4ed6\u5ba2\u6236\u7aef\u53ef\u80fd\u6703\u540c\u6642\u5c0d\u9019\u4e9b\u6578\u64da\u9032\u884c\u8b80\u53d6\u6216\u5beb\u5165\uff0c\u5c0e\u81f4\u6578\u64da\u932f\u8aa4\u3002\u901a\u904e\u4f7f\u7528\u9396\u6a5f\u5236\uff0c\u53ef\u4ee5\u78ba\u4fdd\u5728\u5783\u573e\u56de\u6536\u904e\u7a0b\u4e2d\uff0c\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u5f97\u4ee5\u7dad\u8b77\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
Redis\u7684\u9396\u6a5f\u5236\u5728\u78ba\u4fdd\u5783\u573e\u56de\u6536\u9ad8\u6548\u904b\u884c\u65b9\u9762\u767c\u63ee\u4e86\u91cd\u8981\u4f5c\u7528\u3002\u901a\u904e\u6709\u6548\u7684\u9396\u7ba1\u7406\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u907f\u514d\u6578\u64da\u7af6\u722d\u548c\u4e0d\u4e00\u81f4\u7684\u554f\u984c\uff0c\u5f9e\u800c\u63d0\u9ad8\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002\u96a8\u8457\u61c9\u7528\u9700\u6c42\u7684\u589e\u9577\uff0c\u5c0d\u65bcRedis\u9396\u6a5f\u5236\u7684\u6df1\u5165\u7406\u89e3\u5c07\u6709\u52a9\u65bc\u958b\u767c\u8005\u66f4\u597d\u5730\u7ba1\u7406\u5167\u5b58\u548c\u6578\u64da\u3002<\/p>\n
\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc\u65bc\u9ad8\u6548\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
Redis\u9396\u6a5f\u5236\u78ba\u4fdd\u5783\u573e\u56de\u6536\u9ad8\u6548\u904b\u884c\uff0c\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\uff0c\u6e1b\u5c11\u8cc7\u6e90\u6d6a\u8cbb\uff0c\u5be6\u73fe\u7a69\u5b9a\u7684\u6578\u64da\u7ba1\u7406\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-129343","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/129343","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=129343"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/129343\/revisions"}],"predecessor-version":[{"id":129344,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/129343\/revisions\/129344"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=129343"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=129343"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=129343"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}