{"id":75066,"date":"2024-10-15T23:13:18","date_gmt":"2024-10-15T15:13:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75066\/"},"modified":"2024-10-15T23:13:18","modified_gmt":"2024-10-15T15:13:18","slug":"mysql-%e4%b8%8d%e5%90%8c%e9%9a%94%e9%9b%a2%e7%b4%9a%e5%88%a5%ef%bc%8c%e9%83%bd%e4%bd%bf%e7%94%a8%e4%ba%86%e4%bb%80%e9%ba%bc%e9%8e%96%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75066\/","title":{"rendered":"MySQL \u4e0d\u540c\u9694\u96e2\u7d1a\u5225\uff0c\u90fd\u4f7f\u7528\u4e86\u4ec0\u9ebc\u9396\uff1f"},"content":{"rendered":"<h1 id=\"mysql-%e4%b8%8d%e5%90%8c%e9%9a%94%e9%9b%a2%e7%b4%9a%e5%88%a5%ef%bc%8c%e9%83%bd%e4%bd%bf%e7%94%a8%e4%ba%86%e4%bb%80%e9%ba%bc%e9%8e%96%ef%bc%9f-hbXRjTkpmK\">MySQL \u4e0d\u540c\u9694\u96e2\u7d1a\u5225\uff0c\u90fd\u4f7f\u7528\u4e86\u4ec0\u9ebc\u9396\uff1f<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u9694\u96e2\u7d1a\u5225\u662f\u78ba\u4fdd\u4ea4\u6613\u4e4b\u9593\u76f8\u4e92\u7368\u7acb\u7684\u91cd\u8981\u6a5f\u5236\u3002MySQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u9694\u96e2\u7d1a\u5225\uff0c\u6bcf\u7a2e\u7d1a\u5225\u90fd\u4f7f\u7528\u4e0d\u540c\u7684\u9396\u4f86\u7ba1\u7406\u8cc7\u6599\u7684\u5b58\u53d6\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e MySQL \u7684\u56db\u7a2e\u4e3b\u8981\u9694\u96e2\u7d1a\u5225\u53ca\u5176\u6240\u4f7f\u7528\u7684\u9396\u3002<\/p>\n<h2 id=\"1-%e9%9a%94%e9%9b%a2%e7%b4%9a%e5%88%a5%e6%a6%82%e8%bf%b0-hbXRjTkpmK\">1. \u9694\u96e2\u7d1a\u5225\u6982\u8ff0<\/h2>\n<p>MySQL \u652f\u63f4\u7684\u56db\u7a2e\u9694\u96e2\u7d1a\u5225\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u8b80\u53d6\u672a\u63d0\u4ea4\uff08Read Uncommitted\uff09<\/li>\n<li>\u8b80\u53d6\u5df2\u63d0\u4ea4\uff08Read Committed\uff09<\/li>\n<li>\u53ef\u91cd\u8907\u8b80\u53d6\uff08Repeatable Read\uff09<\/li>\n<li>\u5e8f\u5217\u5316\uff08Serializable\uff09<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u9694\u96e2\u7d1a\u5225\u7684\u9078\u64c7\u6703\u5f71\u97ff\u8cc7\u6599\u7684\u4e00\u81f4\u6027\u548c\u4ea4\u6613\u7684\u6027\u80fd\u3002<\/p>\n<h2 id=\"2-%e8%ae%80%e5%8f%96%e6%9c%aa%e6%8f%90%e4%ba%a4%ef%bc%88read-uncommitted%ef%bc%89-hbXRjTkpmK\">2. \u8b80\u53d6\u672a\u63d0\u4ea4\uff08Read Uncommitted\uff09<\/h2>\n<p>\u5728\u9019\u500b\u9694\u96e2\u7d1a\u5225\u4e0b\uff0c\u4ea4\u6613\u53ef\u4ee5\u8b80\u53d6\u5176\u4ed6\u672a\u63d0\u4ea4\u4ea4\u6613\u7684\u8cc7\u6599\u3002\u9019\u610f\u5473\u8457\u53ef\u80fd\u6703\u51fa\u73fe\u300c\u9ad2\u8b80\u300d\uff08Dirty Read\uff09\u7684\u60c5\u6cc1\uff0c\u5373\u8b80\u53d6\u5230\u7684\u8cc7\u6599\u53ef\u80fd\u6703\u5728\u5f8c\u7e8c\u7684\u4ea4\u6613\u4e2d\u88ab\u56de\u6efe\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8%e7%9a%84%e9%8e%96-hbXRjTkpmK\">\u4f7f\u7528\u7684\u9396<\/h3>\n<p>\u5728\u8b80\u53d6\u672a\u63d0\u4ea4\u7684\u60c5\u6cc1\u4e0b\uff0cMySQL \u4e0d\u6703\u4f7f\u7528\u4efb\u4f55\u9396\u3002\u9019\u4f7f\u5f97\u6027\u80fd\u6700\u4f73\uff0c\u4f46\u8cc7\u6599\u4e00\u81f4\u6027\u537b\u6700\u5dee\u3002<\/p>\n<h2 id=\"3-%e8%ae%80%e5%8f%96%e5%b7%b2%e6%8f%90%e4%ba%a4%ef%bc%88read-committed%ef%bc%89-hbXRjTkpmK\">3. \u8b80\u53d6\u5df2\u63d0\u4ea4\uff08Read Committed\uff09<\/h2>\n<p>\u5728\u8b80\u53d6\u5df2\u63d0\u4ea4\u7684\u9694\u96e2\u7d1a\u5225\u4e2d\uff0c\u4ea4\u6613\u53ea\u80fd\u8b80\u53d6\u5df2\u63d0\u4ea4\u7684\u8cc7\u6599\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u9ad2\u8b80\u7684\u554f\u984c\uff0c\u4f46\u4ecd\u7136\u53ef\u80fd\u51fa\u73fe\u300c\u4e0d\u53ef\u91cd\u8907\u8b80\u53d6\u300d\uff08Non-repeatable Read\uff09\u7684\u60c5\u6cc1\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8%e7%9a%84%e9%8e%96-hbXRjTkpmK\">\u4f7f\u7528\u7684\u9396<\/h3>\n<p>MySQL \u5728\u9019\u500b\u7d1a\u5225\u4e0b\u4f7f\u7528\u884c\u7d1a\u9396\uff08Row-level Locking\uff09\u4f86\u4fdd\u8b77\u6b63\u5728\u88ab\u4fee\u6539\u7684\u8cc7\u6599\u884c\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5176\u4ed6\u4ea4\u6613\u5728\u8b80\u53d6\u6642\u4e0d\u6703\u770b\u5230\u672a\u63d0\u4ea4\u7684\u8b8a\u66f4\u3002<\/p>\n<h2 id=\"4-%e5%8f%af%e9%87%8d%e8%a4%87%e8%ae%80%e5%8f%96%ef%bc%88repeatable-read%ef%bc%89-hbXRjTkpmK\">4. \u53ef\u91cd\u8907\u8b80\u53d6\uff08Repeatable Read\uff09<\/h2>\n<p>\u53ef\u91cd\u8907\u8b80\u53d6\u662f MySQL \u7684\u9810\u8a2d\u9694\u96e2\u7d1a\u5225\u3002\u5728\u9019\u500b\u7d1a\u5225\u4e0b\uff0c\u4ea4\u6613\u5728\u958b\u59cb\u6642\u6703\u770b\u5230\u4e00\u500b\u5feb\u7167\uff0c\u4e26\u4e14\u5728\u6574\u500b\u4ea4\u6613\u904e\u7a0b\u4e2d\u90fd\u80fd\u8b80\u53d6\u5230\u76f8\u540c\u7684\u8cc7\u6599\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u9ad2\u8b80\u548c\u4e0d\u53ef\u91cd\u8907\u8b80\u53d6\u7684\u554f\u984c\uff0c\u4f46\u53ef\u80fd\u6703\u51fa\u73fe\u300c\u5e7b\u8b80\u300d\uff08Phantom Read\uff09\u7684\u60c5\u6cc1\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8%e7%9a%84%e9%8e%96-hbXRjTkpmK\">\u4f7f\u7528\u7684\u9396<\/h3>\n<p>\u5728\u53ef\u91cd\u8907\u8b80\u53d6\u4e2d\uff0cMySQL \u4f7f\u7528\u884c\u7d1a\u9396\u4f86\u4fdd\u8b77\u8cc7\u6599\u884c\uff0c\u540c\u6642\u9084\u6703\u4f7f\u7528\u610f\u5411\u9396\uff08Intent Lock\uff09\u4f86\u7ba1\u7406\u8868\u7d1a\u9396\u7684\u9700\u6c42\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5728\u4ea4\u6613\u671f\u9593\uff0c\u8cc7\u6599\u7684\u4e00\u81f4\u6027\u4e0d\u6703\u53d7\u5230\u5f71\u97ff\u3002<\/p>\n<h2 id=\"5-%e5%ba%8f%e5%88%97%e5%8c%96%ef%bc%88serializable%ef%bc%89-hbXRjTkpmK\">5. \u5e8f\u5217\u5316\uff08Serializable\uff09<\/h2>\n<p>\u5e8f\u5217\u5316\u662f\u6700\u9ad8\u7684\u9694\u96e2\u7d1a\u5225\uff0c\u6240\u6709\u4ea4\u6613\u90fd\u6703\u88ab\u4e32\u884c\u57f7\u884c\u3002\u5728\u9019\u500b\u7d1a\u5225\u4e0b\uff0c\u4efb\u4f55\u4ea4\u6613\u90fd\u7121\u6cd5\u8b80\u53d6\u6216\u4fee\u6539\u5176\u4ed6\u4ea4\u6613\u7684\u8cc7\u6599\uff0c\u5f9e\u800c\u907f\u514d\u4e86\u6240\u6709\u7684\u8b80\u53d6\u554f\u984c\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8%e7%9a%84%e9%8e%96-hbXRjTkpmK\">\u4f7f\u7528\u7684\u9396<\/h3>\n<p>\u5728\u5e8f\u5217\u5316\u9694\u96e2\u7d1a\u5225\u4e2d\uff0cMySQL \u6703\u4f7f\u7528\u8868\u7d1a\u9396\uff08Table-level Lock\uff09\u4f86\u78ba\u4fdd\u8cc7\u6599\u7684\u4e00\u81f4\u6027\u3002\u9019\u6a23\u96d6\u7136\u80fd\u5920\u4fdd\u8b49\u8cc7\u6599\u7684\u5b8c\u6574\u6027\uff0c\u4f46\u6703\u986f\u8457\u964d\u4f4e\u7cfb\u7d71\u7684\u6027\u80fd\u3002<\/p>\n<h2 id=\"6-%e7%b8%bd%e7%b5%90-hbXRjTkpmK\">6. \u7e3d\u7d50<\/h2>\n<p>MySQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u9694\u96e2\u7d1a\u5225\uff0c\u6bcf\u7a2e\u7d1a\u5225\u90fd\u6709\u5176\u7279\u5b9a\u7684\u9396\u6a5f\u5236\uff0c\u4ee5\u5e73\u8861\u8cc7\u6599\u7684\u4e00\u81f4\u6027\u548c\u7cfb\u7d71\u6027\u80fd\u3002\u9078\u64c7\u5408\u9069\u7684\u9694\u96e2\u7d1a\u5225\u5c0d\u65bc\u61c9\u7528\u7a0b\u5f0f\u7684\u6027\u80fd\u548c\u8cc7\u6599\u7684\u5b8c\u6574\u6027\u81f3\u95dc\u91cd\u8981\u3002\u4e86\u89e3\u9019\u4e9b\u9694\u96e2\u7d1a\u5225\u53ca\u5176\u9396\u7684\u4f7f\u7528\u60c5\u6cc1\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5728\u8a2d\u8a08\u8cc7\u6599\u5eab\u6642\u505a\u51fa\u66f4\u660e\u667a\u7684\u6c7a\u7b56\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u80fd\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f <a href=\"https:\/\/server.hk\">\u4e91\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u53ef\u9760\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u4e0d\u540c\u9694\u96e2\u7d1a\u5225\u53ca\u5176\u4f7f\u7528\u7684\u9396\u5b9a\u6a5f\u5236\uff0c\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u5f71\u97ff\u6578\u64da\u4e00\u81f4\u6027\u8207\u4e26\u767c\u6027\u80fd\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-75066","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75066","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=75066"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75066\/revisions"}],"predecessor-version":[{"id":75067,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75066\/revisions\/75067"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75066"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75066"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75066"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}