{"id":188262,"date":"2024-11-11T21:11:21","date_gmt":"2024-11-11T13:11:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/188262\/"},"modified":"2024-11-11T21:11:22","modified_gmt":"2024-11-11T13:11:22","slug":"%e8%ab%87%e8%ab%87%e4%bd%a0%e5%b0%8dmysql%e4%ba%8b%e5%8b%99%e9%9a%94%e9%9b%a2%e7%b4%9a%e5%88%a5%e7%9a%84%e7%90%86%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/188262\/","title":{"rendered":"\u8ac7\u8ac7\u4f60\u5c0dMySQL\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\u7684\u7406\u89e3"},"content":{"rendered":"

\u8ac7\u8ac7\u4f60\u5c0dMySQL\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\u7684\u7406\u89e3<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u4e8b\u52d9\u7684\u9694\u96e2\u7d1a\u5225\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u7684\u91cd\u8981\u6982\u5ff5\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u958b\u6e90\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\uff0c\u4ee5\u6eff\u8db3\u4e0d\u540c\u61c9\u7528\u5834\u666f\u7684\u9700\u6c42\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMySQL\u7684\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\uff0c\u5305\u62ec\u5176\u5b9a\u7fa9\u3001\u7279\u6027\u53ca\u9069\u7528\u5834\u666f\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\uff1f<\/h2>\n

\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\u662f\u6307\u5728\u591a\u500b\u4e8b\u52d9\u4e26\u767c\u57f7\u884c\u6642\uff0c\u5982\u4f55\u63a7\u5236\u5b83\u5011\u4e4b\u9593\u7684\u76f8\u4e92\u5f71\u97ff\u3002\u6839\u64da\u300aSQL\u6a19\u6e96\u300b\uff0c\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\u4e3b\u8981\u6709\u56db\u7a2e\uff1a\u8b80\u672a\u63d0\u4ea4\uff08Read Uncommitted\uff09\u3001\u8b80\u5df2\u63d0\u4ea4\uff08Read Committed\uff09\u3001\u53ef\u91cd\u8907\u8b80\uff08Repeatable Read\uff09\u548c\u4e32\u884c\u5316\uff08Serializable\uff09\u3002\u9019\u4e9b\u7d1a\u5225\u7684\u4e3b\u8981\u76ee\u7684\u662f\u9632\u6b62\u6578\u64da\u4e0d\u4e00\u81f4\u6027\u554f\u984c\uff0c\u5982\u9ad2\u8b80\u3001\u4e0d\u53ef\u91cd\u8907\u8b80\u548c\u5e7b\u8b80\u3002<\/p>\n

MySQL\u7684\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225<\/h2>\n

1. \u8b80\u672a\u63d0\u4ea4\uff08Read Uncommitted\uff09<\/h3>\n

\u5728\u9019\u500b\u9694\u96e2\u7d1a\u5225\u4e0b\uff0c\u4e8b\u52d9\u53ef\u4ee5\u8b80\u53d6\u5176\u4ed6\u4e8b\u52d9\u672a\u63d0\u4ea4\u7684\u6578\u64da\u3002\u9019\u610f\u5473\u8457\u53ef\u80fd\u6703\u51fa\u73fe\u9ad2\u8b80\u7684\u60c5\u6cc1\uff0c\u5373\u4e00\u500b\u4e8b\u52d9\u8b80\u53d6\u5230\u53e6\u4e00\u500b\u4e8b\u52d9\u5c1a\u672a\u63d0\u4ea4\u7684\u6578\u64da\uff0c\u9019\u6a23\u6703\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u3002<\/p>\n

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;<\/code><\/pre>\n
2. \u8b80\u5df2\u63d0\u4ea4\uff08Read Committed\uff09<\/h3>\n
\u5728\u8b80\u5df2\u63d0\u4ea4\u9694\u96e2\u7d1a\u5225\u4e0b\uff0c\u4e8b\u52d9\u53ea\u80fd\u8b80\u53d6\u5df2\u63d0\u4ea4\u7684\u6578\u64da\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u9ad2\u8b80\u7684\u554f\u984c\uff0c\u4f46\u4ecd\u7136\u53ef\u80fd\u51fa\u73fe\u4e0d\u53ef\u91cd\u8907\u8b80\u7684\u60c5\u6cc1\uff0c\u5373\u540c\u4e00\u4e8b\u52d9\u5728\u4e0d\u540c\u6642\u9593\u8b80\u53d6\u5230\u4e0d\u540c\u7684\u6578\u64da\u3002<\/p>\n
SET TRANSACTION ISOLATION LEVEL READ COMMITTED;<\/code><\/pre>\n
3. \u53ef\u91cd\u8907\u8b80\uff08Repeatable Read\uff09<\/h3>\n
\u53ef\u91cd\u8907\u8b80\u662fMySQL\u7684\u9ed8\u8a8d\u9694\u96e2\u7d1a\u5225\u3002\u5728\u9019\u500b\u7d1a\u5225\u4e0b\uff0c\u4e8b\u52d9\u5728\u57f7\u884c\u904e\u7a0b\u4e2d\uff0c\u7121\u8ad6\u591a\u5c11\u6b21\u8b80\u53d6\u540c\u4e00\u6578\u64da\uff0c\u90fd\u6703\u5f97\u5230\u76f8\u540c\u7684\u7d50\u679c\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u9ad2\u8b80\u548c\u4e0d\u53ef\u91cd\u8907\u8b80\u7684\u554f\u984c\uff0c\u4f46\u4ecd\u7136\u53ef\u80fd\u51fa\u73fe\u5e7b\u8b80\uff0c\u5373\u5728\u540c\u4e00\u4e8b\u52d9\u4e2d\uff0c\u67e5\u8a62\u7d50\u679c\u7684\u884c\u6578\u53ef\u80fd\u56e0\u5176\u4ed6\u4e8b\u52d9\u7684\u63d2\u5165\u800c\u6539\u8b8a\u3002<\/p>\n
SET TRANSACTION ISOLATION LEVEL REPEATABLE READ;<\/code><\/pre>\n
4. \u4e32\u884c\u5316\uff08Serializable\uff09<\/h3>\n
\u4e32\u884c\u5316\u662f\u6700\u9ad8\u7684\u9694\u96e2\u7d1a\u5225\u3002\u5728\u9019\u500b\u7d1a\u5225\u4e0b\uff0c\u6240\u6709\u4e8b\u52d9\u90fd\u662f\u4e32\u884c\u57f7\u884c\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u5b8c\u5168\u907f\u514d\u9ad2\u8b80\u3001\u4e0d\u53ef\u91cd\u8907\u8b80\u548c\u5e7b\u8b80\u7684\u554f\u984c\u3002\u7136\u800c\uff0c\u9019\u4e5f\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u56e0\u70ba\u4e8b\u52d9\u4e4b\u9593\u7684\u4e26\u767c\u6027\u88ab\u5b8c\u5168\u9650\u5236\u3002<\/p>\n
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;<\/code><\/pre>\n
\u9078\u64c7\u5408\u9069\u7684\u9694\u96e2\u7d1a\u5225<\/h2>\n
\u9078\u64c7\u5408\u9069\u7684\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\u53d6\u6c7a\u65bc\u61c9\u7528\u7684\u9700\u6c42\u548c\u6027\u80fd\u8003\u91cf\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u4e00\u81f4\u6027\u7684\u61c9\u7528\uff0c\u5efa\u8b70\u4f7f\u7528\u53ef\u91cd\u8907\u8b80\u6216\u4e32\u884c\u5316\uff1b\u800c\u5c0d\u65bc\u5c0d\u6027\u80fd\u8981\u6c42\u8f03\u9ad8\u4e14\u53ef\u4ee5\u5bb9\u5fcd\u4e00\u5b9a\u4e0d\u4e00\u81f4\u6027\u7684\u61c9\u7528\uff0c\u5247\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u8b80\u5df2\u63d0\u4ea4\u6216\u8b80\u672a\u63d0\u4ea4\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
MySQL\u7684\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u7684\u95dc\u9375\u56e0\u7d20\u3002\u4e86\u89e3\u5404\u7a2e\u9694\u96e2\u7d1a\u5225\u7684\u7279\u6027\u53ca\u5176\u9069\u7528\u5834\u666f\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\u505a\u51fa\u66f4\u660e\u667a\u7684\u9078\u64c7\u3002\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u9694\u96e2\u7d1a\u5225\uff0c\u80fd\u5920\u5728\u6027\u80fd\u548c\u6578\u64da\u4e00\u81f4\u6027\u4e4b\u9593\u53d6\u5f97\u826f\u597d\u7684\u5e73\u8861\u3002<\/p>\n
\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u60a8\u7684\u61c9\u7528\u4e2d\u5be6\u73fe\u6700\u4f73\u7684\u6578\u64da\u5eab\u6027\u80fd\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u6709\u95dc\u9999\u6e2fVPS<\/a>\u548c\u96f2\u4f3a\u670d\u5668<\/a>\u7684\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u8a0eMySQL\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\u7684\u5b9a\u7fa9\u3001\u985e\u578b\u53ca\u5176\u5c0d\u6578\u64da\u4e00\u81f4\u6027\u548c\u4e26\u767c\u6027\u7684\u5f71\u97ff\uff0c\u5e6b\u52a9\u7406\u89e3\u6578\u64da\u5eab\u7ba1\u7406\u7684\u95dc\u9375\u6982\u5ff5\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-188262","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188262","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=188262"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188262\/revisions"}],"predecessor-version":[{"id":188263,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188262\/revisions\/188263"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=188262"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=188262"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=188262"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}