{"id":186570,"date":"2024-11-11T07:01:34","date_gmt":"2024-11-10T23:01:34","guid":{"rendered":"https:\/\/server.hk\/cnblog\/186570\/"},"modified":"2024-11-11T07:01:35","modified_gmt":"2024-11-10T23:01:35","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e9%9a%94%e9%9b%a2%e7%b4%9a%e5%88%a5%e7%9a%84%e9%87%8d%e8%a6%81%e6%80%a7%e5%92%8c%e5%82%b3%e6%92%ad%e6%96%b9%e6%b3%95%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%ab%e9%9a%94%e9%9b%a2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/186570\/","title":{"rendered":"\u6578\u64da\u5eab\u9694\u96e2\u7d1a\u5225\u7684\u91cd\u8981\u6027\u548c\u50b3\u64ad\u65b9\u6cd5\uff08\u6578\u64da\u5eab\u9694\u96e2\u7d1a\u5225\u50b3\u64ad\uff09"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e9%9a%94%e9%9b%a2%e7%b4%9a%e5%88%a5%e7%9a%84%e9%87%8d%e8%a6%81%e6%80%a7%e5%92%8c%e5%82%b3%e6%92%ad%e6%96%b9%e6%b3%95%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%ab%e9%9a%94%e9%9b%a2-qgWdctLtcv\">\u6578\u64da\u5eab\u9694\u96e2\u7d1a\u5225\u7684\u91cd\u8981\u6027\u548c\u50b3\u64ad\u65b9\u6cd5\uff08\u6578\u64da\u5eab\u9694\u96e2\u7d1a\u5225\u50b3\u64ad\uff09<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u81f3\u95dc\u91cd\u8981\u3002\u6578\u64da\u5eab\u9694\u96e2\u7d1a\u5225\u662f\u5f71\u97ff\u6578\u64da\u5eab\u64cd\u4f5c\u884c\u70ba\u7684\u4e00\u500b\u95dc\u9375\u56e0\u7d20\u3002\u5b83\u5b9a\u7fa9\u4e86\u5728\u591a\u500b\u4e8b\u52d9\u540c\u6642\u57f7\u884c\u6642\uff0c\u4e8b\u52d9\u4e4b\u9593\u7684\u76f8\u4e92\u5f71\u97ff\u7a0b\u5ea6\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6578\u64da\u5eab\u9694\u96e2\u7d1a\u5225\u7684\u91cd\u8981\u6027\u53ca\u5176\u50b3\u64ad\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e9%9a%94%e9%9b%a2%e7%b4%9a%e5%88%a5%e7%9a%84%e5%ae%9a%e7%be%a9-qgWdctLtcv\">\u6578\u64da\u5eab\u9694\u96e2\u7d1a\u5225\u7684\u5b9a\u7fa9<\/h2>\n<p>\u6578\u64da\u5eab\u9694\u96e2\u7d1a\u5225\u662f\u6307\u5728\u591a\u500b\u4e8b\u52d9\u4e26\u884c\u57f7\u884c\u6642\uff0c\u5982\u4f55\u63a7\u5236\u4e8b\u52d9\u4e4b\u9593\u7684\u76f8\u4e92\u5f71\u97ff\u3002\u6839\u64daSQL\u6a19\u6e96\uff0c\u6578\u64da\u5eab\u9694\u96e2\u7d1a\u5225\u4e3b\u8981\u5206\u70ba\u56db\u7a2e\uff1a<\/p>\n<ul>\n<li><strong>\u8b80\u672a\u63d0\u4ea4\uff08Read Uncommitted\uff09<\/strong>\uff1a\u4e8b\u52d9\u53ef\u4ee5\u8b80\u53d6\u5176\u4ed6\u4e8b\u52d9\u672a\u63d0\u4ea4\u7684\u6578\u64da\uff0c\u9019\u53ef\u80fd\u5c0e\u81f4\u9ad2\u8b80\uff08Dirty Read\uff09\u3002<\/li>\n<li><strong>\u8b80\u5df2\u63d0\u4ea4\uff08Read Committed\uff09<\/strong>\uff1a\u4e8b\u52d9\u53ea\u80fd\u8b80\u53d6\u5df2\u63d0\u4ea4\u7684\u6578\u64da\uff0c\u907f\u514d\u4e86\u9ad2\u8b80\uff0c\u4f46\u53ef\u80fd\u6703\u51fa\u73fe\u4e0d\u53ef\u91cd\u8907\u8b80\uff08Non-repeatable Read\uff09\u3002<\/li>\n<li><strong>\u53ef\u91cd\u8907\u8b80\uff08Repeatable Read\uff09<\/strong>\uff1a\u5728\u540c\u4e00\u4e8b\u52d9\u4e2d\u591a\u6b21\u8b80\u53d6\u540c\u4e00\u6578\u64da\u6642\uff0c\u7d50\u679c\u662f\u4e00\u81f4\u7684\uff0c\u907f\u514d\u4e86\u9ad2\u8b80\u548c\u4e0d\u53ef\u91cd\u8907\u8b80\uff0c\u4f46\u53ef\u80fd\u6703\u51fa\u73fe\u5e7b\u8b80\uff08Phantom Read\uff09\u3002<\/li>\n<li><strong>\u5e8f\u5217\u5316\uff08Serializable\uff09<\/strong>\uff1a\u6700\u9ad8\u7684\u9694\u96e2\u7d1a\u5225\uff0c\u6240\u6709\u4e8b\u52d9\u6309\u5e8f\u5217\u5316\u7684\u65b9\u5f0f\u57f7\u884c\uff0c\u5b8c\u5168\u907f\u514d\u4e86\u9ad2\u8b80\u3001\u4e0d\u53ef\u91cd\u8907\u8b80\u548c\u5e7b\u8b80\uff0c\u4f46\u6027\u80fd\u958b\u92b7\u8f03\u5927\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e9%9a%94%e9%9b%a2%e7%b4%9a%e5%88%a5%e7%9a%84%e9%87%8d%e8%a6%81%e6%80%a7-qgWdctLtcv\">\u6578\u64da\u5eab\u9694\u96e2\u7d1a\u5225\u7684\u91cd\u8981\u6027<\/h2>\n<p>\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u9694\u96e2\u7d1a\u5225\u5c0d\u65bc\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u6578\u64da\u4e00\u81f4\u6027\u81f3\u95dc\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u5e7e\u500b\u95dc\u9375\u539f\u56e0\uff1a<\/p>\n<h3 id=\"1-%e6%95%b8%e6%93%9a%e4%b8%80%e8%87%b4%e6%80%a7-qgWdctLtcv\">1. \u6578\u64da\u4e00\u81f4\u6027<\/h3>\n<p>\u5728\u591a\u7528\u6236\u74b0\u5883\u4e2d\uff0c\u6578\u64da\u4e00\u81f4\u6027\u662f\u78ba\u4fdd\u61c9\u7528\u7a0b\u5e8f\u6b63\u5e38\u904b\u884c\u7684\u57fa\u790e\u3002\u9078\u64c7\u5408\u9069\u7684\u9694\u96e2\u7d1a\u5225\u53ef\u4ee5\u6709\u6548\u907f\u514d\u6578\u64da\u932f\u8aa4\u548c\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u3002\u4f8b\u5982\uff0c\u5728\u91d1\u878d\u61c9\u7528\u4e2d\uff0c\u4f7f\u7528\u5e8f\u5217\u5316\u9694\u96e2\u7d1a\u5225\u53ef\u4ee5\u78ba\u4fdd\u4ea4\u6613\u7684\u6e96\u78ba\u6027\u3002<\/p>\n<h3 id=\"2-%e6%80%a7%e8%83%bd%e8%80%83%e9%87%8f-qgWdctLtcv\">2. \u6027\u80fd\u8003\u91cf<\/h3>\n<p>\u4e0d\u540c\u7684\u9694\u96e2\u7d1a\u5225\u5c0d\u6027\u80fd\u7684\u5f71\u97ff\u5404\u7570\u3002\u8f03\u4f4e\u7684\u9694\u96e2\u7d1a\u5225\uff08\u5982\u8b80\u672a\u63d0\u4ea4\uff09\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\uff0c\u4f46\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u3002\u76f8\u53cd\uff0c\u8f03\u9ad8\u7684\u9694\u96e2\u7d1a\u5225\uff08\u5982\u5e8f\u5217\u5316\uff09\u96d6\u7136\u80fd\u4fdd\u8b49\u6578\u64da\u4e00\u81f4\u6027\uff0c\u4f46\u6703\u589e\u52a0\u4e8b\u52d9\u7684\u7b49\u5f85\u6642\u9593\u548c\u8cc7\u6e90\u6d88\u8017\u3002\u56e0\u6b64\uff0c\u6839\u64da\u61c9\u7528\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u9694\u96e2\u7d1a\u5225\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<h3 id=\"3-%e9%8c%af%e8%aa%a4%e8%99%95%e7%90%86-qgWdctLtcv\">3. \u932f\u8aa4\u8655\u7406<\/h3>\n<p>\u5728\u591a\u4e8b\u52d9\u74b0\u5883\u4e2d\uff0c\u932f\u8aa4\u8655\u7406\u8b8a\u5f97\u66f4\u52a0\u8907\u96dc\u3002\u9078\u64c7\u5408\u9069\u7684\u9694\u96e2\u7d1a\u5225\u53ef\u4ee5\u6e1b\u5c11\u932f\u8aa4\u767c\u751f\u7684\u6a5f\u6703\uff0c\u4e26\u7c21\u5316\u932f\u8aa4\u8655\u7406\u7684\u908f\u8f2f\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u53ef\u91cd\u8907\u8b80\u9694\u96e2\u7d1a\u5225\u53ef\u4ee5\u6e1b\u5c11\u56e0\u6578\u64da\u8b8a\u66f4\u5c0e\u81f4\u7684\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e9%9a%94%e9%9b%a2%e7%b4%9a%e5%88%a5%e7%9a%84%e5%82%b3%e6%92%ad%e6%96%b9%e6%b3%95-qgWdctLtcv\">\u6578\u64da\u5eab\u9694\u96e2\u7d1a\u5225\u7684\u50b3\u64ad\u65b9\u6cd5<\/h2>\n<p>\u6578\u64da\u5eab\u9694\u96e2\u7d1a\u5225\u7684\u50b3\u64ad\u65b9\u6cd5\u4e3b\u8981\u6d89\u53ca\u5982\u4f55\u5728\u4e0d\u540c\u7684\u4e8b\u52d9\u4e4b\u9593\u4fdd\u6301\u4e00\u81f4\u6027\u3002\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u5e38\u898b\u7684\u50b3\u64ad\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e4%ba%8b%e5%8b%99%e4%b8%8a%e4%b8%8b%e6%96%87-qgWdctLtcv\">1. \u4e8b\u52d9\u4e0a\u4e0b\u6587<\/h3>\n<p>\u5728\u8a31\u591a\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\uff0c\u4e8b\u52d9\u4e0a\u4e0b\u6587\u53ef\u4ee5\u7528\u4f86\u8a2d\u7f6e\u548c\u50b3\u64ad\u9694\u96e2\u7d1a\u5225\u3002\u958b\u767c\u8005\u53ef\u4ee5\u5728\u4e8b\u52d9\u958b\u59cb\u6642\u6307\u5b9a\u6240\u9700\u7684\u9694\u96e2\u7d1a\u5225\uff0c\u4e26\u5728\u6574\u500b\u4e8b\u52d9\u904e\u7a0b\u4e2d\u4fdd\u6301\u8a72\u7d1a\u5225\u3002<\/p>\n<pre><code>SET TRANSACTION ISOLATION LEVEL READ COMMITTED;\nBEGIN TRANSACTION;\n-- \u9032\u884c\u6578\u64da\u64cd\u4f5c\nCOMMIT;<\/code><\/pre>\n<h3 id=\"2-%e9%80%a3%e6%8e%a5%e5%b1%a4%e7%b4%9a%e8%a8%ad%e7%bd%ae-qgWdctLtcv\">2. \u9023\u63a5\u5c64\u7d1a\u8a2d\u7f6e<\/h3>\n<p>\u67d0\u4e9b\u6578\u64da\u5eab\u7cfb\u7d71\u5141\u8a31\u5728\u9023\u63a5\u5c64\u7d1a\u8a2d\u7f6e\u9694\u96e2\u7d1a\u5225\uff0c\u9019\u610f\u5473\u8457\u6240\u6709\u901a\u904e\u8a72\u9023\u63a5\u57f7\u884c\u7684\u4e8b\u52d9\u90fd\u5c07\u9075\u5faa\u76f8\u540c\u7684\u9694\u96e2\u7d1a\u5225\u3002\u9019\u5c0d\u65bc\u9700\u8981\u4e00\u81f4\u6027\u548c\u6027\u80fd\u7684\u61c9\u7528\u7a0b\u5e8f\u7279\u5225\u6709\u7528\u3002<\/p>\n<pre><code>SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;<\/code><\/pre>\n<h3 id=\"3-%e6%87%89%e7%94%a8%e5%b1%a4%e7%b4%9a%e6%8e%a7%e5%88%b6-qgWdctLtcv\">3. \u61c9\u7528\u5c64\u7d1a\u63a7\u5236<\/h3>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u61c9\u7528\u7a0b\u5e8f\u672c\u8eab\u53ef\u4ee5\u63a7\u5236\u4e8b\u52d9\u7684\u9694\u96e2\u7d1a\u5225\u3002\u9019\u901a\u5e38\u6d89\u53ca\u5230\u5728\u61c9\u7528\u7a0b\u5e8f\u908f\u8f2f\u4e2d\u6839\u64da\u5177\u9ad4\u60c5\u6cc1\u52d5\u614b\u8abf\u6574\u9694\u96e2\u7d1a\u5225\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-qgWdctLtcv\">\u7e3d\u7d50<\/h2>\n<p>\u6578\u64da\u5eab\u9694\u96e2\u7d1a\u5225\u5728\u591a\u4e8b\u52d9\u74b0\u5883\u4e2d\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\uff0c\u5f71\u97ff\u8457\u6578\u64da\u7684\u4e00\u81f4\u6027\u3001\u6027\u80fd\u548c\u932f\u8aa4\u8655\u7406\u3002\u9078\u64c7\u5408\u9069\u7684\u9694\u96e2\u7d1a\u5225\u548c\u6709\u6548\u7684\u50b3\u64ad\u65b9\u6cd5\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5728\u4fdd\u8b49\u6578\u64da\u4e00\u81f4\u6027\u7684\u540c\u6642\uff0c\u63d0\u5347\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u652f\u6301\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u9ad8\u6548\u548c\u5b89\u5168\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u6578\u64da\u5eab\u9694\u96e2\u7d1a\u5225\u7684\u91cd\u8981\u6027\u53ca\u5176\u50b3\u64ad\u65b9\u6cd5\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u7cfb\u7d71\u6027\u80fd\u7684\u6700\u4f73\u5be6\u8e10\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-186570","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186570","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=186570"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186570\/revisions"}],"predecessor-version":[{"id":186571,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186570\/revisions\/186571"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=186570"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=186570"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=186570"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}