{"id":163271,"date":"2024-11-04T22:06:18","date_gmt":"2024-11-04T14:06:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/163271\/"},"modified":"2024-11-04T22:06:19","modified_gmt":"2024-11-04T14:06:19","slug":"%e8%a7%a3%e6%b1%bamysql%e5%b9%bb%e8%ae%80%e7%9a%84%e7%b5%82%e6%a5%b5%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/163271\/","title":{"rendered":"\u89e3\u6c7aMySQL\u5e7b\u8b80\u7684\u7d42\u6975\u6307\u5357"},"content":{"rendered":"<h1 id=\"%e8%a7%a3%e6%b1%bamysql%e5%b9%bb%e8%ae%80%e7%9a%84%e7%b5%82%e6%a5%b5%e6%8c%87%e5%8d%97-tpLcpWyxoO\">\u89e3\u6c7aMySQL\u5e7b\u8b80\u7684\u7d42\u6975\u6307\u5357<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u578b\u6578\u64da\u5eab\u7cfb\u7d71\u3002\u96a8\u8457\u61c9\u7528\u7a0b\u5e8f\u7684\u8907\u96dc\u6027\u589e\u52a0\uff0c\u6578\u64da\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u5728\u9019\u500b\u904e\u7a0b\u4e2d\uff0c\u5e7b\u8b80\uff08Phantom Read\uff09\u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\uff0c\u7279\u5225\u662f\u5728\u9ad8\u4f75\u767c\u74b0\u5883\u4e2d\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5e7b\u8b80\u7684\u6982\u5ff5\u3001\u6210\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%b9%bb%e8%ae%80%ef%bc%9f-tpLcpWyxoO\">\u4ec0\u9ebc\u662f\u5e7b\u8b80\uff1f<\/h2>\n<p>\u5e7b\u8b80\u662f\u6307\u5728\u4e00\u500b\u4e8b\u52d9\u4e2d\uff0c\u7576\u4f60\u518d\u6b21\u57f7\u884c\u4e00\u500b\u67e5\u8a62\u6642\uff0c\u767c\u73fe\u7d50\u679c\u96c6\u767c\u751f\u4e86\u8b8a\u5316\uff0c\u9019\u662f\u56e0\u70ba\u5176\u4ed6\u4e8b\u52d9\u63d2\u5165\u4e86\u65b0\u7684\u6578\u64da\u884c\u3002\u9019\u7a2e\u60c5\u6cc1\u901a\u5e38\u767c\u751f\u5728\u4f7f\u7528\u8f03\u4f4e\u7684\u9694\u96e2\u7d1a\u5225\uff08\u5982\u8b80\u53d6\u5df2\u63d0\u4ea4\uff09\u6642\u3002\u8209\u500b\u4f8b\u5b50\uff0c\u5047\u8a2d\u4f60\u5728\u4e00\u500b\u4e8b\u52d9\u4e2d\u67e5\u8a62\u4e86\u67d0\u500b\u689d\u4ef6\u4e0b\u7684\u6240\u6709\u8a18\u9304\uff0c\u7136\u5f8c\u5728\u540c\u4e00\u4e8b\u52d9\u4e2d\u518d\u6b21\u67e5\u8a62\uff0c\u537b\u767c\u73fe\u6709\u65b0\u7684\u8a18\u9304\u51fa\u73fe\uff0c\u9019\u5c31\u662f\u5e7b\u8b80\u3002<\/p>\n<h2 id=\"%e5%b9%bb%e8%ae%80%e7%9a%84%e6%88%90%e5%9b%a0-tpLcpWyxoO\">\u5e7b\u8b80\u7684\u6210\u56e0<\/h2>\n<p>\u5e7b\u8b80\u7684\u4e3b\u8981\u6210\u56e0\u662f\u4e8b\u52d9\u7684\u9694\u96e2\u7d1a\u5225\u8a2d\u5b9a\u4e0d\u7576\u3002MySQL\u652f\u6301\u56db\u7a2e\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\uff1a<\/p>\n<ul>\n<li><strong>\u8b80\u53d6\u672a\u63d0\u4ea4\uff08Read Uncommitted\uff09<\/strong>&lt;\/\uff1a\u9019\u662f\u6700\u4f4e\u7684\u9694\u96e2\u7d1a\u5225\uff0c\u5141\u8a31\u4e8b\u52d9\u8b80\u53d6\u672a\u63d0\u4ea4\u7684\u8b8a\u66f4\uff0c\u5bb9\u6613\u5c0e\u81f4\u5e7b\u8b80\u3002<\/li>\n<li><strong>\u8b80\u53d6\u5df2\u63d0\u4ea4\uff08Read Committed\uff09<\/strong>\uff1a\u4e8b\u52d9\u53ea\u80fd\u8b80\u53d6\u5df2\u63d0\u4ea4\u7684\u6578\u64da\uff0c\u6e1b\u5c11\u4e86\u5e7b\u8b80\u7684\u53ef\u80fd\u6027\uff0c\u4f46\u4ecd\u7136\u7121\u6cd5\u5b8c\u5168\u907f\u514d\u3002<\/li>\n<li><strong>\u53ef\u91cd\u8907\u8b80\u53d6\uff08Repeatable Read\uff09<\/strong>\uff1a\u9019\u662fMySQL\u7684\u9ed8\u8a8d\u9694\u96e2\u7d1a\u5225\uff0c\u80fd\u5920\u9632\u6b62\u5e7b\u8b80\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u4ecd\u7136\u53ef\u80fd\u51fa\u73fe\u3002<\/li>\n<li><strong>\u4e32\u884c\u5316\uff08Serializable\uff09<\/strong>\uff1a\u6700\u9ad8\u7684\u9694\u96e2\u7d1a\u5225\uff0c\u901a\u904e\u5f37\u5236\u4e8b\u52d9\u4e32\u884c\u57f7\u884c\u4f86\u5b8c\u5168\u907f\u514d\u5e7b\u8b80\uff0c\u4f46\u6703\u5f71\u97ff\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e5%b9%bb%e8%ae%80%e7%9a%84%e6%96%b9%e6%b3%95-tpLcpWyxoO\">\u89e3\u6c7a\u5e7b\u8b80\u7684\u65b9\u6cd5<\/h2>\n<p>\u70ba\u4e86\u89e3\u6c7a\u5e7b\u8b80\u554f\u984c\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e8%aa%bf%e6%95%b4%e4%ba%8b%e5%8b%99%e9%9a%94%e9%9b%a2%e7%b4%9a%e5%88%a5-tpLcpWyxoO\">1. \u8abf\u6574\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225<\/h3>\n<p>\u5c07\u4e8b\u52d9\u7684\u9694\u96e2\u7d1a\u5225\u8a2d\u7f6e\u70ba\u4e32\u884c\u5316\u53ef\u4ee5\u5b8c\u5168\u907f\u514d\u5e7b\u8b80\uff0c\u4f46\u9019\u6703\u5f71\u97ff\u7cfb\u7d71\u7684\u6027\u80fd\u3002\u901a\u5e38\u5efa\u8b70\u5728\u6027\u80fd\u548c\u6578\u64da\u4e00\u81f4\u6027\u4e4b\u9593\u627e\u5230\u4e00\u500b\u5e73\u8861\u9ede\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u4f86\u8a2d\u7f6e\u9694\u96e2\u7d1a\u5225\uff1a<\/p>\n<pre><code>SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e8%a1%8c%e7%b4%9a%e9%8e%96-tpLcpWyxoO\">2. \u4f7f\u7528\u884c\u7d1a\u9396<\/h3>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528\u884c\u7d1a\u9396\u53ef\u4ee5\u6709\u6548\u9632\u6b62\u5e7b\u8b80\u3002\u9019\u53ef\u4ee5\u901a\u904e\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528FOR UPDATE\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>SELECT * FROM your_table WHERE condition FOR UPDATE;<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u9396\u5b9a\u67e5\u8a62\u7d50\u679c\u4e2d\u7684\u884c\uff0c\u9632\u6b62\u5176\u4ed6\u4e8b\u52d9\u63d2\u5165\u65b0\u884c\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8%e5%bf%ab%e7%85%a7%e9%9a%94%e9%9b%a2-tpLcpWyxoO\">3. \u4f7f\u7528\u5feb\u7167\u9694\u96e2<\/h3>\n<p>\u5feb\u7167\u9694\u96e2\u662f\u4e00\u7a2e\u901a\u904e\u7dad\u8b77\u6578\u64da\u7684\u591a\u500b\u7248\u672c\u4f86\u907f\u514d\u5e7b\u8b80\u7684\u65b9\u6cd5\u3002MySQL\u7684InnoDB\u5b58\u5132\u5f15\u64ce\u652f\u6301\u9019\u7a2e\u9694\u96e2\u7d1a\u5225\uff0c\u53ef\u4ee5\u901a\u904e\u8a2d\u7f6e\u4ee5\u4e0b\u53c3\u6578\u4f86\u555f\u7528\uff1a<\/p>\n<pre><code>SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-tpLcpWyxoO\">\u7d50\u8ad6<\/h2>\n<p>\u5e7b\u8b80\u662f\u4e00\u500b\u5728\u9ad8\u4f75\u767c\u74b0\u5883\u4e2d\u5e38\u898b\u7684\u554f\u984c\uff0c\u5c0d\u65bc\u9700\u8981\u9ad8\u6578\u64da\u4e00\u81f4\u6027\u7684\u61c9\u7528\u7a0b\u5e8f\u4f86\u8aaa\uff0c\u7406\u89e3\u548c\u89e3\u6c7a\u5e7b\u8b80\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u8abf\u6574\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\u3001\u4f7f\u7528\u884c\u7d1a\u9396\u548c\u5feb\u7167\u9694\u96e2\u7b49\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u6e1b\u5c11\u6216\u6d88\u9664\u5e7b\u8b80\u7684\u5f71\u97ff\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u4e14\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u89e3\u6c7aMySQL\u5e7b\u8b80\u7684\u7d42\u6975\u6307\u5357\uff0c\u5b78\u7fd2\u6709\u6548\u7684\u9396\u5b9a\u7b56\u7565\u548c\u6700\u4f73\u5be6\u8e10\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u5b8c\u6574\u6027\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-163271","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163271","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=163271"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163271\/revisions"}],"predecessor-version":[{"id":163272,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163271\/revisions\/163272"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=163271"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=163271"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=163271"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}