{"id":188466,"date":"2024-11-11T22:58:30","date_gmt":"2024-11-11T14:58:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/188466\/"},"modified":"2024-11-11T22:58:31","modified_gmt":"2024-11-11T14:58:31","slug":"%e6%8e%a2%e7%a9%b6%e6%95%b8%e6%93%9a%e5%ba%ab%e6%8e%92%e5%ae%83%e9%8e%96%e7%9a%84%e4%bd%9c%e7%94%a8%e8%88%87%e5%af%a6%e7%8f%be%e6%96%b9%e5%bc%8f-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%8e%92%e5%ae%83%e9%8e%96","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/188466\/","title":{"rendered":"\u63a2\u7a76\u6578\u64da\u5eab\u6392\u5b83\u9396\u7684\u4f5c\u7528\u8207\u5be6\u73fe\u65b9\u5f0f (\u6578\u64da\u5eab\u6392\u5b83\u9396)"},"content":{"rendered":"<h1 id=\"%e6%8e%a2%e7%a9%b6%e6%95%b8%e6%93%9a%e5%ba%ab%e6%8e%92%e5%ae%83%e9%8e%96%e7%9a%84%e4%bd%9c%e7%94%a8%e8%88%87%e5%af%a6%e7%8f%be%e6%96%b9%e5%bc%8f-qMEWqVjVRi\">\u63a2\u7a76\u6578\u64da\u5eab\u6392\u5b83\u9396\u7684\u4f5c\u7528\u8207\u5be6\u73fe\u65b9\u5f0f<\/h1>\n<p>\u5728\u73fe\u4ee3\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u70ba\u4e86\u4fdd\u8b77\u6578\u64da\u4e0d\u88ab\u540c\u6642\u8a2a\u554f\u800c\u5c0e\u81f4\u7684\u885d\u7a81\uff0c\u6578\u64da\u5eab\u4f7f\u7528\u4e86\u591a\u7a2e\u9396\u6a5f\u5236\uff0c\u5176\u4e2d\u6392\u5b83\u9396\uff08Exclusive Lock\uff09\u662f\u4e00\u7a2e\u5e38\u898b\u4e14\u91cd\u8981\u7684\u9396\u985e\u578b\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u6392\u5b83\u9396\u7684\u4f5c\u7528\u53ca\u5176\u5be6\u73fe\u65b9\u5f0f\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%8e%92%e5%ae%83%e9%8e%96%ef%bc%9f-qMEWqVjVRi\">\u4ec0\u9ebc\u662f\u6392\u5b83\u9396\uff1f<\/h2>\n<p>\u6392\u5b83\u9396\u662f\u4e00\u7a2e\u9396\u5b9a\u6a5f\u5236\uff0c\u7576\u4e00\u500b\u4e8b\u52d9\u7372\u5f97\u6392\u5b83\u9396\u6642\uff0c\u5176\u4ed6\u4e8b\u52d9\u7121\u6cd5\u5c0d\u88ab\u9396\u5b9a\u7684\u6578\u64da\u9032\u884c\u4efb\u4f55\u5f62\u5f0f\u7684\u8b80\u53d6\u6216\u5beb\u5165\u64cd\u4f5c\u3002\u9019\u610f\u5473\u8457\u5728\u6392\u5b83\u9396\u5b58\u5728\u7684\u60c5\u6cc1\u4e0b\uff0c\u53ea\u6709\u6301\u6709\u8a72\u9396\u7684\u4e8b\u52d9\u53ef\u4ee5\u8a2a\u554f\u88ab\u9396\u5b9a\u7684\u8cc7\u6e90\uff0c\u5f9e\u800c\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/p>\n<h2 id=\"%e6%8e%92%e5%ae%83%e9%8e%96%e7%9a%84%e4%bd%9c%e7%94%a8-qMEWqVjVRi\">\u6392\u5b83\u9396\u7684\u4f5c\u7528<\/h2>\n<ul>\n<li><strong>\u4fdd\u8b77\u6578\u64da\u5b8c\u6574\u6027\uff1a<\/strong>\u6392\u5b83\u9396\u80fd\u5920\u9632\u6b62\u591a\u500b\u4e8b\u52d9\u540c\u6642\u4fee\u6539\u540c\u4e00\u6578\u64da\uff0c\u5f9e\u800c\u907f\u514d\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u767c\u751f\u3002<\/li>\n<li><strong>\u907f\u514d\u6b7b\u9396\uff1a<\/strong>\u96d6\u7136\u6392\u5b83\u9396\u672c\u8eab\u53ef\u80fd\u5c0e\u81f4\u6b7b\u9396\uff0c\u4f46\u5408\u7406\u7684\u4f7f\u7528\u53ef\u4ee5\u6e1b\u5c11\u6b7b\u9396\u7684\u767c\u751f\u6a5f\u7387\u3002\u4f8b\u5982\uff0c\u4e8b\u52d9\u5728\u7372\u5f97\u6392\u5b83\u9396\u5f8c\uff0c\u61c9\u76e1\u5feb\u91cb\u653e\u9396\u3002<\/li>\n<li><strong>\u63d0\u9ad8\u6578\u64da\u5b89\u5168\u6027\uff1a<\/strong>\u901a\u904e\u9650\u5236\u5c0d\u6578\u64da\u7684\u8a2a\u554f\uff0c\u6392\u5b83\u9396\u80fd\u5920\u63d0\u9ad8\u6578\u64da\u7684\u5b89\u5168\u6027\uff0c\u9632\u6b62\u672a\u7d93\u6388\u6b0a\u7684\u8a2a\u554f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%8e%92%e5%ae%83%e9%8e%96%e7%9a%84%e5%af%a6%e7%8f%be%e6%96%b9%e5%bc%8f-qMEWqVjVRi\">\u6392\u5b83\u9396\u7684\u5be6\u73fe\u65b9\u5f0f<\/h2>\n<p>\u6392\u5b83\u9396\u7684\u5be6\u73fe\u65b9\u5f0f\u901a\u5e38\u4f9d\u8cf4\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\u7684\u9396\u7ba1\u7406\u6a5f\u5236\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u5be6\u73fe\u65b9\u5f0f\uff1a<\/p>\n<h3 id=\"1-%e8%a1%8c%e7%b4%9a%e9%8e%96-qMEWqVjVRi\">1. \u884c\u7d1a\u9396<\/h3>\n<p>\u884c\u7d1a\u9396\u662f\u6307\u5c0d\u6578\u64da\u8868\u4e2d\u7684\u7279\u5b9a\u884c\u9032\u884c\u9396\u5b9a\u3002\u9019\u7a2e\u65b9\u5f0f\u80fd\u5920\u63d0\u9ad8\u4e26\u767c\u6027\uff0c\u56e0\u70ba\u4e0d\u540c\u7684\u4e8b\u52d9\u53ef\u4ee5\u540c\u6642\u5c0d\u4e0d\u540c\u7684\u884c\u9032\u884c\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684 SQL \u793a\u4f8b\uff1a<\/p>\n<pre><code>BEGIN TRANSACTION;\n-- \u7372\u53d6\u6392\u5b83\u9396\nSELECT * FROM users WHERE id = 1 FOR UPDATE;\n-- \u57f7\u884c\u66f4\u65b0\u64cd\u4f5c\nUPDATE users SET balance = balance - 100 WHERE id = 1;\nCOMMIT;<\/code><\/pre>\n<h3 id=\"2-%e8%a1%a8%e7%b4%9a%e9%8e%96-qMEWqVjVRi\">2. \u8868\u7d1a\u9396<\/h3>\n<p>\u8868\u7d1a\u9396\u662f\u6307\u5c0d\u6574\u500b\u6578\u64da\u8868\u9032\u884c\u9396\u5b9a\u3002\u9019\u7a2e\u65b9\u5f0f\u96d6\u7136\u7c21\u55ae\uff0c\u4f46\u6703\u964d\u4f4e\u4e26\u767c\u6027\uff0c\u56e0\u70ba\u5728\u9396\u5b9a\u671f\u9593\uff0c\u5176\u4ed6\u4e8b\u52d9\u7121\u6cd5\u8a2a\u554f\u8a72\u8868\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u8868\u7d1a\u9396\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>BEGIN TRANSACTION;\n-- \u7372\u53d6\u6392\u5b83\u9396\nLOCK TABLE users IN EXCLUSIVE MODE;\n-- \u57f7\u884c\u66f4\u65b0\u64cd\u4f5c\nUPDATE users SET balance = balance - 100 WHERE id = 1;\nCOMMIT;<\/code><\/pre>\n<h3 id=\"3-%e8%87%aa%e5%8b%95%e9%8e%96%e5%ae%9a-qMEWqVjVRi\">3. \u81ea\u52d5\u9396\u5b9a<\/h3>\n<p>\u8a31\u591a\u73fe\u4ee3\u6578\u64da\u5eab\u7cfb\u7d71\u652f\u6301\u81ea\u52d5\u9396\u5b9a\u6a5f\u5236\uff0c\u7576\u4e8b\u52d9\u57f7\u884c\u7279\u5b9a\u64cd\u4f5c\u6642\uff0c\u7cfb\u7d71\u6703\u81ea\u52d5\u70ba\u76f8\u95dc\u6578\u64da\u52a0\u4e0a\u6392\u5b83\u9396\u3002\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u958b\u767c\u8005\u7684\u8ca0\u64d4\uff0c\u4e26\u63d0\u9ad8\u6578\u64da\u64cd\u4f5c\u7684\u5b89\u5168\u6027\u3002<\/p>\n<h2 id=\"%e6%8e%92%e5%ae%83%e9%8e%96%e7%9a%84%e6%8c%91%e6%88%b0-qMEWqVjVRi\">\u6392\u5b83\u9396\u7684\u6311\u6230<\/h2>\n<p>\u5118\u7ba1\u6392\u5b83\u9396\u5728\u4fdd\u8b77\u6578\u64da\u5b8c\u6574\u6027\u65b9\u9762\u5177\u6709\u91cd\u8981\u4f5c\u7528\uff0c\u4f46\u4e5f\u5b58\u5728\u4e00\u4e9b\u6311\u6230\u3002\u4f8b\u5982\uff0c\u904e\u5ea6\u4f7f\u7528\u6392\u5b83\u9396\u53ef\u80fd\u5c0e\u81f4\u6027\u80fd\u74f6\u9838\uff0c\u56e0\u70ba\u5176\u4ed6\u4e8b\u52d9\u9700\u8981\u7b49\u5f85\u9396\u7684\u91cb\u653e\u3002\u6b64\u5916\uff0c\u8a2d\u8a08\u4e0d\u7576\u7684\u9396\u7b56\u7565\u53ef\u80fd\u6703\u5c0e\u81f4\u6b7b\u9396\u554f\u984c\uff0c\u5f71\u97ff\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-qMEWqVjVRi\">\u7e3d\u7d50<\/h2>\n<p>\u6392\u5b83\u9396\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\uff0c\u80fd\u5920\u6709\u6548\u5730\u4fdd\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u901a\u904e\u5408\u7406\u7684\u4f7f\u7528\u884c\u7d1a\u9396\u3001\u8868\u7d1a\u9396\u548c\u81ea\u52d5\u9396\u5b9a\u6a5f\u5236\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5728\u4fdd\u8b49\u6578\u64da\u5b89\u5168\u7684\u540c\u6642\uff0c\u63d0\u9ad8\u7cfb\u7d71\u7684\u4e26\u767c\u6027\u80fd\u3002\u7136\u800c\uff0c\u5c0d\u65bc\u6392\u5b83\u9396\u7684\u4f7f\u7528\u4e5f\u9700\u8b39\u614e\uff0c\u4ee5\u907f\u514d\u6027\u80fd\u554f\u984c\u548c\u6b7b\u9396\u7684\u767c\u751f\u3002\u4e86\u89e3\u9019\u4e9b\u6982\u5ff5\u5c0d\u65bc\u4efb\u4f55\u5e0c\u671b\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u53d6\u5f97\u6210\u529f\u7684\u958b\u767c\u8005\u4f86\u8aaa\u90fd\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u3002\u82e5\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u53ca\u5176\u76f8\u95dc\u670d\u52d9\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7a76\u6578\u64da\u5eab\u6392\u5b83\u9396\u7684\u4f5c\u7528\u8207\u5be6\u73fe\u65b9\u5f0f\uff0c\u4e86\u89e3\u5176\u5728\u6578\u64da\u4e00\u81f4\u6027\u548c\u4e26\u767c\u63a7\u5236\u4e2d\u7684\u91cd\u8981\u6027\u53ca\u61c9\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-188466","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188466","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=188466"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188466\/revisions"}],"predecessor-version":[{"id":188467,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188466\/revisions\/188467"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=188466"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=188466"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=188466"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}