{"id":76326,"date":"2024-10-16T05:44:14","date_gmt":"2024-10-15T21:44:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76326\/"},"modified":"2024-10-16T05:44:15","modified_gmt":"2024-10-15T21:44:15","slug":"mysql%e4%ba%8b%e5%8b%99%e8%99%95%e7%90%86%e5%95%8f%e9%a1%8c%e7%9a%84%e6%ad%a3%e7%a2%ba%e8%a7%a3%e6%b1%ba","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76326\/","title":{"rendered":"MySQL\u4e8b\u52d9\u8655\u7406\u554f\u984c\u7684\u6b63\u78ba\u89e3\u6c7a"},"content":{"rendered":"<h1 id=\"mysql%e4%ba%8b%e5%8b%99%e8%99%95%e7%90%86%e5%95%8f%e9%a1%8c%e7%9a%84%e6%ad%a3%e7%a2%ba%e8%a7%a3%e6%b1%ba-xjjmAbPivl\">MySQL\u4e8b\u52d9\u8655\u7406\u554f\u984c\u7684\u6b63\u78ba\u89e3\u6c7a<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u4e8b\u52d9\u8655\u7406\u662fMySQL\u7684\u4e00\u500b\u91cd\u8981\u7279\u6027\uff0c\u5b83\u78ba\u4fdd\u4e86\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u7136\u800c\uff0c\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u958b\u767c\u8005\u7d93\u5e38\u6703\u9047\u5230\u4e8b\u52d9\u8655\u7406\u7684\u554f\u984c\u3002\u672c\u6587\u5c07\u63a2\u8a0eMySQL\u4e8b\u52d9\u8655\u7406\u7684\u57fa\u672c\u6982\u5ff5\u3001\u5e38\u898b\u554f\u984c\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afmysql%e4%ba%8b%e5%8b%99%ef%bc%9f-xjjmAbPivl\">\u4ec0\u9ebc\u662fMySQL\u4e8b\u52d9\uff1f<\/h2>\n<p>\u4e8b\u52d9\u662f\u4e00\u7d44\u64cd\u4f5c\u7684\u96c6\u5408\uff0c\u9019\u4e9b\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u6210\u529f\uff0c\u8981\u9ebc\u5168\u90e8\u5931\u6557\u3002MySQL\u652f\u6301ACID\u7279\u6027\uff0c\u9019\u662f\u4e8b\u52d9\u7684\u56db\u500b\u57fa\u672c\u5c6c\u6027\uff1a<\/p>\n<ul>\n<li><strong>\u539f\u5b50\u6027\uff08Atomicity\uff09<\/strong>\uff1a\u4e8b\u52d9\u4e2d\u7684\u6240\u6709\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u57f7\u884c\uff0c\u8981\u9ebc\u5168\u90e8\u4e0d\u57f7\u884c\u3002<\/li>\n<li><strong>\u4e00\u81f4\u6027\uff08Consistency\uff09<\/strong>\uff1a\u4e8b\u52d9\u5fc5\u9808\u4f7f\u6578\u64da\u5eab\u5f9e\u4e00\u500b\u4e00\u81f4\u7684\u72c0\u614b\u8f49\u8b8a\u5230\u53e6\u4e00\u500b\u4e00\u81f4\u7684\u72c0\u614b\u3002<\/li>\n<li><strong>\u9694\u96e2\u6027\uff08Isolation\uff09<\/strong>\uff1a\u540c\u6642\u57f7\u884c\u7684\u4e8b\u52d9\u4e0d\u61c9\u4e92\u76f8\u5f71\u97ff\u3002<\/li>\n<li><strong>\u6301\u4e45\u6027\uff08Durability\uff09<\/strong>\uff1a\u4e00\u65e6\u4e8b\u52d9\u63d0\u4ea4\uff0c\u5176\u7d50\u679c\u662f\u6c38\u4e45\u6027\u7684\uff0c\u5373\u4f7f\u7cfb\u7d71\u5d29\u6f70\u4e5f\u4e0d\u6703\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%b8%b8%e8%a6%8b%e7%9a%84mysql%e4%ba%8b%e5%8b%99%e8%99%95%e7%90%86%e5%95%8f%e9%a1%8c-xjjmAbPivl\">\u5e38\u898b\u7684MySQL\u4e8b\u52d9\u8655\u7406\u554f\u984c<\/h2>\n<p>\u5728\u4f7f\u7528MySQL\u9032\u884c\u4e8b\u52d9\u8655\u7406\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u4ee5\u4e0b\u5e7e\u500b\u5e38\u898b\u554f\u984c\uff1a<\/p>\n<h3 id=\"1-%e6%ad%bb%e9%8e%96%ef%bc%88deadlock%ef%bc%89-xjjmAbPivl\">1. \u6b7b\u9396\uff08Deadlock\uff09<\/h3>\n<p>\u6b7b\u9396\u662f\u6307\u5169\u500b\u6216\u591a\u500b\u4e8b\u52d9\u4e92\u76f8\u7b49\u5f85\u5c0d\u65b9\u91cb\u653e\u8cc7\u6e90\uff0c\u5c0e\u81f4\u6240\u6709\u4e8b\u52d9\u7121\u6cd5\u7e7c\u7e8c\u57f7\u884c\u3002\u9019\u901a\u5e38\u767c\u751f\u5728\u591a\u500b\u4e8b\u52d9\u540c\u6642\u57f7\u884c\u6642\u3002<\/p>\n<pre><code>START TRANSACTION;\nUPDATE accounts SET balance = balance - 100 WHERE account_id = 1;\nUPDATE accounts SET balance = balance + 100 WHERE account_id = 2;\nCOMMIT;<\/code><\/pre>\n<p>\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u82e5\u4e8b\u52d9A\u5728\u66f4\u65b0\u5e33\u62361\u5f8c\u7b49\u5f85\u5e33\u62362\uff0c\u800c\u4e8b\u52d9B\u5728\u66f4\u65b0\u5e33\u62362\u5f8c\u7b49\u5f85\u5e33\u62361\uff0c\u5c31\u6703\u767c\u751f\u6b7b\u9396\u3002<\/p>\n<h3 id=\"2-%e4%ba%8b%e5%8b%99%e6%9c%aa%e6%8f%90%e4%ba%a4%ef%bc%88uncommitted-transactions%ef%bc%89-xjjmAbPivl\">2. \u4e8b\u52d9\u672a\u63d0\u4ea4\uff08Uncommitted Transactions\uff09<\/h3>\n<p>\u5982\u679c\u4e8b\u52d9\u672a\u80fd\u6b63\u78ba\u63d0\u4ea4\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u3002\u9019\u901a\u5e38\u662f\u7531\u65bc\u61c9\u7528\u7a0b\u5e8f\u932f\u8aa4\u6216\u7cfb\u7d71\u5d29\u6f70\u5f15\u8d77\u7684\u3002<\/p>\n<h3 id=\"3-%e9%9a%94%e9%9b%a2%e6%80%a7%e5%95%8f%e9%a1%8c-xjjmAbPivl\">3. \u9694\u96e2\u6027\u554f\u984c<\/h3>\n<p>\u5728\u9ad8\u4f75\u767c\u74b0\u5883\u4e2d\uff0c\u4e8b\u52d9\u7684\u9694\u96e2\u6027\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\uff0c\u5c0e\u81f4\u8b80\u53d6\u5230\u4e0d\u4e00\u81f4\u7684\u6578\u64da\u3002\u9019\u5305\u62ec\u4e0d\u53ef\u91cd\u8907\u8b80\u53d6\u548c\u5e7b\u8b80\u7b49\u554f\u984c\u3002<\/p>\n<h2 id=\"%e8%a7%a3%e6%b1%bamysql%e4%ba%8b%e5%8b%99%e8%99%95%e7%90%86%e5%95%8f%e9%a1%8c%e7%9a%84%e6%96%b9%e6%b3%95-xjjmAbPivl\">\u89e3\u6c7aMySQL\u4e8b\u52d9\u8655\u7406\u554f\u984c\u7684\u65b9\u6cd5<\/h2>\n<p>\u91dd\u5c0d\u4e0a\u8ff0\u554f\u984c\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u7a2e\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n<h3 id=\"1-%e9%81%bf%e5%85%8d%e6%ad%bb%e9%8e%96-xjjmAbPivl\">1. \u907f\u514d\u6b7b\u9396<\/h3>\n<p>\u70ba\u4e86\u907f\u514d\u6b7b\u9396\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u63a1\u7528\u4ee5\u4e0b\u7b56\u7565\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u4e8b\u52d9\u4ee5\u76f8\u540c\u7684\u9806\u5e8f\u7372\u53d6\u9396\u3002<\/li>\n<li>\u4f7f\u7528\u8f03\u77ed\u7684\u4e8b\u52d9\uff0c\u6e1b\u5c11\u9396\u6301\u6709\u7684\u6642\u9593\u3002<\/li>\n<li>\u5b9a\u671f\u6aa2\u67e5\u548c\u91cd\u8a66\u6b7b\u9396\u7684\u4e8b\u52d9\u3002<\/li>\n<\/ul>\n<h3 id=\"2-%e7%a2%ba%e4%bf%9d%e4%ba%8b%e5%8b%99%e6%8f%90%e4%ba%a4-xjjmAbPivl\">2. \u78ba\u4fdd\u4e8b\u52d9\u63d0\u4ea4<\/h3>\n<p>\u958b\u767c\u8005\u61c9\u8a72\u5728\u6bcf\u500b\u4e8b\u52d9\u7d50\u675f\u6642\u6aa2\u67e5\u662f\u5426\u6210\u529f\u63d0\u4ea4\uff0c\u4e26\u5728\u51fa\u73fe\u932f\u8aa4\u6642\u9032\u884c\u56de\u6efe\u64cd\u4f5c\u3002<\/p>\n<pre><code>IF (error) THEN\n    ROLLBACK;\nELSE\n    COMMIT;\nEND IF;<\/code><\/pre>\n<h3 id=\"3-%e8%aa%bf%e6%95%b4%e9%9a%94%e9%9b%a2%e7%b4%9a%e5%88%a5-xjjmAbPivl\">3. \u8abf\u6574\u9694\u96e2\u7d1a\u5225<\/h3>\n<p>MySQL\u63d0\u4f9b\u4e86\u591a\u7a2e\u9694\u96e2\u7d1a\u5225\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6839\u64da\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u9694\u96e2\u7d1a\u5225\u4f86\u5e73\u8861\u6027\u80fd\u548c\u6578\u64da\u4e00\u81f4\u6027\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528READ COMMITTED\u4f86\u6e1b\u5c11\u4e0d\u53ef\u91cd\u8907\u8b80\u53d6\u7684\u554f\u984c\u3002<\/p>\n<pre><code>SET TRANSACTION ISOLATION LEVEL READ COMMITTED;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-xjjmAbPivl\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u7684\u4e8b\u52d9\u8655\u7406\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u7684\u95dc\u9375\u3002\u7136\u800c\uff0c\u958b\u767c\u8005\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u554f\u984c\uff0c\u5982\u6b7b\u9396\u3001\u4e8b\u52d9\u672a\u63d0\u4ea4\u548c\u9694\u96e2\u6027\u554f\u984c\u3002\u901a\u904e\u63a1\u53d6\u9069\u7576\u7684\u7b56\u7565\u548c\u6280\u8853\uff0c\u9019\u4e9b\u554f\u984c\u53ef\u4ee5\u5f97\u5230\u6709\u6548\u89e3\u6c7a\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u80fd\u548c\u7a69\u5b9a\u6027\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u4e86\u89e3MySQL\u4e8b\u52d9\u8655\u7406\u7684\u57fa\u672c\u6982\u5ff5\u548c\u89e3\u6c7a\u65b9\u6848\uff0c\u5c07\u6709\u52a9\u65bc\u958b\u767c\u8005\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u505a\u51fa\u66f4\u660e\u667a\u7684\u6c7a\u7b56\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u6c7aMySQL\u4e8b\u52d9\u8655\u7406\u554f\u984c\u7684\u6b63\u78ba\u65b9\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u4e00\u81f4\u6027\u8207\u6027\u80fd\uff0c\u78ba\u4fdd\u61c9\u7528\u7a0b\u5e8f\u7684\u7a69\u5b9a\u904b\u884c\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-76326","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76326","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=76326"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76326\/revisions"}],"predecessor-version":[{"id":76327,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76326\/revisions\/76327"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76326"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76326"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76326"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}