{"id":7297,"date":"2023-11-28T18:29:30","date_gmt":"2023-11-28T10:29:30","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=7297"},"modified":"2023-11-28T18:29:46","modified_gmt":"2023-11-28T10:29:46","slug":"mysql-zhonginnodb-zhi-chi-de-si-zhong-shi-wu-ge-li","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/mysql-zhonginnodb-zhi-chi-de-si-zhong-shi-wu-ge-li\/","title":{"rendered":"MySQL\u4e2dInnoDB\u652f\u6301\u7684\u56db\u79cd\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u540d\u79f0\uff0c\u4ee5\u53ca\u9010\u7ea7\u4e4b\u95f4\u7684\u533a\u522b\uff1f"},"content":{"rendered":"<p>Read Uncommited\u8bfb\u5230\u672a\u63d0\u4ea4\u6570\u636e\uff1a\u5728\u9694\u79bb\u7ea7\u522b\u4e2d\uff0c\u6240\u6709\u4e8b\u52a1\u90fd\u53ef\u4ee5\u770b\u5230\u5176\u4ed6\u672a\u63d0\u4ea4\u4e8b\u52a1\u7684\u6267\u884c\u7ed3\u679c\u3002\u672c\u9694\u79bb\u7ea7\u522b\u5f88\u5c11\u7528\u4e8e\u5b9e\u9645\u5e94\u7528\uff0c\u56e0\u4e3a\u4ed6\u7684\u6027\u80fd\u4e5f\u4e0d\u6bd4\u5176\u4ed6\u7ea7\u522b\u597d\u591a\u5c11\u3002\u8bfb\u53d6\u5230\u672a\u63d0\u4ea4\u7684\u6570\u636e\uff0c\u4e5f\u88ab\u79f0\u4e4b\u4e3a\u810f\u8bfb(Dirty Read).<br \/>\nRead Commited\u8bfb\u5230\u63d0\u4ea4\u5185\u5bb9\uff1a\u8fd9\u662f\u5927\u591a\u6570\u6570\u636e\u5e93\u7cfb\u7edf\u7684\u9ed8\u8ba4\u9694\u79bb\u7ea7\u522b(\u4f46\u4e0d\u662fMysql\u9ed8\u8ba4\u7684)\u3002\u5b83\u6ee1\u8db3\u4e86\u9694\u79bb\u7684\u7b80\u5355\u5b9a\u4e49\uff1a\u4e00\u4e2a\u4e8b\u52a1\u53ea\u80fd\u770b\u89c1\u5df2\u7ecf\u63d0\u4ea4\u4e8b\u52a1\u6240\u505a\u7684\u6539\u53d8\u3002\u8fd9\u79cd\u9694\u79bb\u7ea7\u522b\u4e5f\u652f\u6301\u6240\u8c13\u7684\u4e0d\u53ef\u91cd\u590d\u8bfb(Nonrepeatable Read),\u56e0\u4e3a\u540c\u4e00\u4e8b\u7269\u7684\u5176\u4ed6\u5b9e\u4f8b\u5728\u8be5\u5b9e\u4f8b\u5904\u7406\u671f\u95f4\u53ef\u80fd\u4f1a\u6709\u65b0\u7684Commit,\u6240\u4ee5\u540c\u4e00select\u53ef\u4ee5\u8fd4\u56de\u4e0d\u540c\u7ed3\u679c\u3002<br \/>\nRepeatable Read(\u53ef\u91cd\u8bfb)\uff1a\u8fd9\u662fMysql\u7684\u9ed8\u8ba4\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\uff0c\u5b83\u786e\u4fdd\u540c\u4e00\u4e8b\u7269\u7684\u591a\u4e2a\u5b9e\u4f8b\u5728\u5e76\u53d1\u8bfb\u53d6\u6570\u636e\u65f6\uff0c\u4f1a\u770b\u5230\u540c\u6837\u7684\u6570\u636e\u884c\u3002\u4e0d\u8fc7\u7406\u8bba\u4e0a\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u53e6\u4e00\u4e2a\u68d8\u624b\u7684\u95ee\u9898\uff1a\u5e7b\u8bfb(Phantom Read):\u7b80\u5355\u7684\u8bf4\uff0c\u5e7b\u8bfb\u6307\u5f53\u7528\u6237\u8bfb\u53d6\u67d0\u4e00\u8303\u56f4\u7684\u6570\u636e\u884c\u65f6\uff0c\u53e6\u4e00\u4e8b\u52a1\u53c8\u5728\u8be5\u8303\u56f4\u5185\u63d2\u5165\u4e86\u65b0\u884c\uff0c\u5f53\u7528\u6237\u518d\u8bfb\u53d6\u8be5\u8303\u56f4\u7684\u6570\u636e\u884c\u65f6\uff0c\u4f1a\u53d1\u73b0\u6709\u65b0\u7684\u201c\u5e7b\u5f71\u201d\u884c\u3002InnoDB\u548cFalcon\u5b58\u50a8\u5f15\u64ce\u901a\u8fc7\u591a\u7248\u672c\u5e76\u53d1\u63a7\u5236(MVCC,Multiversion Concurrency Control\u95f4\u9699\u9501)\u673a\u5236\u89e3\u51b3\u95ee\u9898\u3002\u6ce8\uff1a\u5176\u5b9e\u591a\u7248\u672c\u53ea\u662f\u89e3\u51b3\u4e0d\u53ef\u91cd\u590d\u8bfb\u95ee\u9898\uff0c\u800c\u52a0\u4e0a\u95f4\u9699\u9501(\u4e5f\u5c31\u65f6\u5b83\u8fd9\u91cc\u6240\u8c13\u7684\u5e76\u53d1\u63a7\u5236)\u624d\u89e3\u51b3\u4e86\u5e7b\u8bfb\u95ee\u9898\u3002<br \/>\nSerializable(\u53ef\u4e32\u884c\u5316)\uff1a\u8fd9\u662f\u6700\u9ad8\u7684\u9694\u79bb\u7ea7\u522b\uff0c\u5b83\u901a\u8fc7\u5f3a\u5236\u4e8b\u52a1\u6392\u5e8f\uff0c\u4f7f\u4e4b\u4e0d\u53ef\u80fd\u4e92\u76f8\u51b2\u7a81\u4ece\u800c\u89e3\u51b3\u5e7b\u8bfb\u95ee\u9898\u3002\u7b80\u800c\u8a00\u4e4b\uff0c\u5b83\u662f\u5728\u6bcf\u4e2a\u8bfb\u7684\u6570\u636e\u884c\u4e0a\u52a0\u4e0a\u5171\u4eab\u9501\u3002\u5728\u8fd9\u4e2a\u7ea7\u522b\uff0c\u53ef\u80fd\u5bfc\u81f4\u5927\u91cf\u7684\u8d85\u65f6\u73b0\u8c61\u548c\u9501\u7ade\u4e89\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Read Uncommited\u8bfb\u5230\u672a\u63d0\u4ea4\u6570\u636e\uff1a\u5728\u9694\u79bb\u7ea7\u522b\u4e2d\uff0c\u6240\u6709\u4e8b\u52a1\u90fd\u53ef\u4ee5\u770b\u5230\u5176\u4ed6\u672a\u63d0\u4ea4\u4e8b\u52a1\u7684\u6267\u884c\u7ed3\u679c\u3002\u672c\u9694\u79bb [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[102],"tags":[],"class_list":["post-7297","post","type-post","status-publish","format-standard","hentry","category-db"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/7297","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=7297"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/7297\/revisions"}],"predecessor-version":[{"id":7298,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/7297\/revisions\/7298"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=7297"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=7297"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=7297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}