{"id":1153,"date":"2021-03-09T15:01:21","date_gmt":"2021-03-09T07:01:21","guid":{"rendered":"http:\/\/www.rain1024.com\/?p=1153"},"modified":"2023-08-07T20:57:23","modified_gmt":"2023-08-07T12:57:23","slug":"%e6%88%91%e7%94%b1%e5%b9%bb%e8%af%bb%e8%80%8c%e6%98%8e%e7%99%bd%e4%ba%86%e6%95%b0%e6%8d%ae%e5%ba%93%e4%ba%8b%e5%8a%a1","status":"publish","type":"post","link":"http:\/\/rain1024.com\/index.php\/2021\/03\/09\/%e6%88%91%e7%94%b1%e5%b9%bb%e8%af%bb%e8%80%8c%e6%98%8e%e7%99%bd%e4%ba%86%e6%95%b0%e6%8d%ae%e5%ba%93%e4%ba%8b%e5%8a%a1\/","title":{"rendered":"\u6211\u7531\u5e7b\u8bfb\u800c\u660e\u767d\u4e86\u6570\u636e\u5e93\u4e8b\u52a1"},"content":{"rendered":"<h1>\u6211\u7531\u5e7b\u8bfb\u800c\u660e\u767d\u4e86\u6570\u636e\u5e93\u4e8b\u52a1<\/h1>\n<h4>\u521a\u5f00\u59cb\u63a5\u89e6\u6570\u636e\u5e93\u4e8b\u52a1\u7684\u65f6\u5019\uff0c\u603b\u4f1a\u88ab\u810f\u8bfb\uff0c\u4e0d\u53ef\u91cd\u590d\u8bfb\uff0c\u5e7b\u8bfb\uff0c\u8bfb\u672a\u63d0\u4ea4\uff0c\u8bfb\u5df2\u63d0\u4ea4\uff0c\u53ef\u91cd\u590d\u8bfb\u7b49\u7b49\u8fd9\u4e9b\u201c\u8bfb\u201d\u540d\u8bcd\u6574\u7684\u7279\u522b\u6df7\u4e71\u3002\u53ea\u80fd\u53bb\u786c\u8bb0\u6570\u636e\u5e93\u4e8b\u52a1\u7684\u7ea7\u522b\uff0c\u4ee5\u53ca\u6bcf\u4e2a\u7ea7\u522b\u53ef\u4ee5\u89e3\u51b3\u7684\u95ee\u9898\uff0c\u548c\u4e0d\u540c\u6570\u636e\u5e93\u5b9e\u73b0\u7684\u4e8b\u52a1\u7ea7\u522b\uff0c\u76f4\u5230\u540e\u6765\u5f7b\u5e95\u770b\u5b8cinnodb\u5f15\u64ce\u5bf9\u4e8b\u52a1\u7684\u5904\u7406\uff0c\u624d\u7b97\u5f7b\u5e95\u7406\u6e05\u8fd9\u4e9b\u4e8b\u52a1\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u5f53\u522b\u4eba\u518d\u95ee\u8d77\u6765\u65f6\uff0c\u53ef\u4ee5\u9a6c\u4e0a\u6839\u636e\u5e95\u5c42\u539f\u7406\u8bf4\u6e05\u695a\u4e0e\u7406\u8bba\u7684\u5173\u7cfb\u3002<\/h4>\n<h4>\u672c\u6587\u4e2d\u8fd8\u662f\u4ee5innodb\u5f15\u64ce\u4e3a\u4f8b\u6765\u8fdb\u884c\u8bf4\u660e\uff0c\u5176\u4ed6\u6570\u636e\u5e93\u6216\u5f15\u64ce\u6240\u77e5\u751a\u5c11\u5c31\u4e0d\u8c08\u53ca\u4e86\u3002<\/h4>\n<h4>\u7b80\u5355\u7684\u8bf4\u4e8b\u52a1\u5c31\u662f\u4fdd\u8bc1\u4e00\u7ec4\u64cd\u4f5c\u8981\u4e48\u5168\u90e8\u6210\u529f\u8981\u4e48\u5168\u90e8\u5931\u8d25\uff0c\u63d0\u5230\u4e8b\u52a1\u5c31\u4f1a\u8bf4\u8d77\u4e8b\u52a1\u7279\u6027ACID\uff08\u539f\u5b50\u6027\uff0c\u4e00\u81f4\u6027\uff0c\u9694\u79bb\u6027\uff0c\u6301\u4e45\u6027\uff09\uff0c\u8fd9\u91cc\u6211\u4eec\u4e3b\u8981\u8bf4\u4e8b\u52a1\u7684\u9694\u79bb\u6027\u3002<\/h4>\n<p><strong>SQL \u6807\u51c6\u5b9a\u4e49\u4e86\u56db\u4e2a\u9694\u79bb\u7ea7\u522b\uff1a<\/strong><\/p>\n<ul>\n<li><strong>READ-UNCOMMITTED(\u8bfb\u53d6\u672a\u63d0\u4ea4)\uff1a<\/strong> \u6700\u4f4e\u7684\u9694\u79bb\u7ea7\u522b\uff0c\u5141\u8bb8\u8bfb\u53d6\u5c1a\u672a\u63d0\u4ea4\u7684\u6570\u636e\u53d8\u66f4\uff0c<strong>\u53ef\u80fd\u4f1a\u5bfc\u81f4\u810f\u8bfb\u3001\u5e7b\u8bfb\u6216\u4e0d\u53ef\u91cd\u590d\u8bfb<\/strong>\u3002<\/li>\n<li><strong>READ-COMMITTED(\u8bfb\u53d6\u5df2\u63d0\u4ea4)\uff1a<\/strong> \u5141\u8bb8\u8bfb\u53d6\u5e76\u53d1\u4e8b\u52a1\u5df2\u7ecf\u63d0\u4ea4\u7684\u6570\u636e\uff0c<strong>\u53ef\u4ee5\u963b\u6b62\u810f\u8bfb\uff0c\u4f46\u662f\u5e7b\u8bfb\u6216\u4e0d\u53ef\u91cd\u590d\u8bfb\u4ecd\u6709\u53ef\u80fd\u53d1\u751f<\/strong>\u3002<\/li>\n<li><strong>REPEATABLE-READ(\u53ef\u91cd\u590d\u8bfb)\uff1a<\/strong> \u5bf9\u540c\u4e00\u5b57\u6bb5\u7684\u591a\u6b21\u8bfb\u53d6\u7ed3\u679c\u90fd\u662f\u4e00\u81f4\u7684\uff0c\u9664\u975e\u6570\u636e\u662f\u88ab\u672c\u8eab\u4e8b\u52a1\u81ea\u5df1\u6240\u4fee\u6539\uff0c<strong>\u53ef\u4ee5\u963b\u6b62\u810f\u8bfb\u548c\u4e0d\u53ef\u91cd\u590d\u8bfb\uff0c\u4f46\u5e7b\u8bfb\u4ecd\u6709\u53ef\u80fd\u53d1\u751f<\/strong>\u3002<\/li>\n<li><strong>SERIALIZABLE(\u53ef\u4e32\u884c\u5316)\uff1a<\/strong> \u6700\u9ad8\u7684\u9694\u79bb\u7ea7\u522b\uff0c\u5b8c\u5168\u670d\u4eceACID\u7684\u9694\u79bb\u7ea7\u522b\u3002\u6240\u6709\u7684\u4e8b\u52a1\u4f9d\u6b21\u9010\u4e2a\u6267\u884c\uff0c\u8fd9\u6837\u4e8b\u52a1\u4e4b\u95f4\u5c31\u5b8c\u5168\u4e0d\u53ef\u80fd\u4ea7\u751f\u5e72\u6270\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c<strong>\u8be5\u7ea7\u522b\u53ef\u4ee5\u9632\u6b62\u810f\u8bfb\u3001\u4e0d\u53ef\u91cd\u590d\u8bfb\u4ee5\u53ca\u5e7b\u8bfb<\/strong>\u3002<\/li>\n<\/ul>\n<h4>\u8fd8\u6709\u4e0b\u9762\u8fd9\u4e2a\u770b\u4f3c\u7b80\u5355\u5b9e\u5219\u8ff7\u60d1\u7684\u8868\u683c<\/h4>\n<table>\n<thead>\n<tr>\n<th>\u9694\u79bb\u7ea7\u522b<\/th>\n<th>\u810f\u8bfb<\/th>\n<th>\u4e0d\u53ef\u91cd\u590d\u8bfb<\/th>\n<th>\u5e7b\u8bfb<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>READ-UNCOMMITTED<\/td>\n<td>\u221a<\/td>\n<td>\u221a<\/td>\n<td>\u221a<\/td>\n<\/tr>\n<tr>\n<td>READ-COMMITTED<\/td>\n<td>\u00d7<\/td>\n<td>\u221a<\/td>\n<td>\u221a<\/td>\n<\/tr>\n<tr>\n<td>REPEATABLE-READ<\/td>\n<td>\u00d7<\/td>\n<td>\u00d7<\/td>\n<td>\u221a<\/td>\n<\/tr>\n<tr>\n<td>SERIALIZABLE<\/td>\n<td>\u00d7<\/td>\n<td>\u00d7<\/td>\n<td>\u00d7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h5>MySQL InnoDB \u5b58\u50a8\u5f15\u64ce\u7684\u9ed8\u8ba4\u652f\u6301\u7684\u9694\u79bb\u7ea7\u522b\u662f <strong>REPEATABLE-READ\uff08\u53ef\u91cd\u590d\u8bfb\uff09<\/strong>\uff0c\u53ef\u4ee5\u901a\u8fc7\u547d\u4ee4\u6765\u67e5\u8be2\u6216\u8005\u4fee\u6539\u4e8b\u52a1\u7ea7\u522b\u3002<\/h5>\n<h4>\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u6bcf\u4e2a\u7ea7\u522b\u6765\u5206\u6790\uff0c\u6700\u4f4e\u7684RU\u7ea7\u522b\u5176\u5b9e\u90fd\u4e0d\u9700\u8981\u505a\u5904\u7406\uff0c\u810f\u6570\u636e\u6216\u91cd\u590d\u6570\u636e\u90fd\u4f1a\u51fa\u73b0\uff0c\u800c\u5728RC\u4e0eRR\u7ea7\u522b\u4e0b\uff0cinnodb\u901a\u8fc7undo log\u6765\u5b9e\u73b0\u591a\u7248\u672c\u5e76\u53d1\u63a7\u5236\uff08MVCC\uff09\u4e2d\u7528\u5230\u7684\u4e00\u81f4\u6027\u8bfb\u89c6\u56fe\u3002<\/h4>\n<h4>1. RC\u4e8b\u52a1\u7ea7\u522b\u4e2d\u662f\u5141\u8bb8\u8bfb\u53d6\u5230\u5df2\u7ecf\u63d0\u4ea4\u7684\u6570\u636e\uff0c\u5305\u62ec\u4fee\u6539\u548c\u589e\u52a0\u6570\u636e\uff0c\u8fd9\u4e5f\u662f\u5927\u591a\u6570\u6570\u636e\u5e93\u652f\u6301\u7684\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\uff0c\u56e0\u4e3a\u8bfb\u5230\u90fd\u662f\u5176\u4ed6\u4e8b\u52a1\u63d0\u4ea4\u7684\uff0c\u4e00\u822c\u6765\u8bf4\u662f\u53ef\u4ee5\u63a5\u53d7\u7684\uff0c\u5e76\u4e0d\u4f1a\u5e26\u6765\u5f88\u5927\u7684\u95ee\u9898\uff0c\u4f46\u5176\u8fdd\u53cd\u4e86\u4e8b\u52a1\u4e00\u81f4\u6027\u7684\u89c4\u5b9a\u3002\u5728RC\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u4e0b\uff0c\u4ec5\u91c7\u7528Record lock\uff0c\u9664\u4e86\u552f\u4e00\u6027\u7684\u7ea6\u675f\u68c0\u67e5\u4e0e\u5916\u952e\u7ea6\u675f\u7684\u68c0\u67e5\u9700\u8981gap lock\uff0c\u5176\u4ed6\u5730\u65b9\u4e0d\u4f7f\u7528gap lock\u7684\u9501\u3002<\/h4>\n<h4>2. \u5728RR\u53ef\u91cd\u590d\u8bfb\u7684\u4e8b\u52a1\u7ea7\u522b\u4e0b\uff0cinnodb\u4f7f\u7528Next-key lock\u9501\u7684\u7b97\u6cd5\u6765\u907f\u514d\u4e0d\u53ef\u91cd\u590d\u8bfb\u7684\u95ee\u9898\uff0c\u5373\u5e7b\u8c61\u95ee\u9898\uff0c\u5728Next-key lock\u9501\u4e0b\uff0c\u5bf9\u4e8e\u7d22\u5f15\u7684\u626b\u63cf\u4e0d\u4ec5\u662f\u9501\u4f4f\u626b\u63cf\u5230\u7684\u7d22\u5f15\uff0c\u800c\u4e14\u8fd8\u9501\u4f4f\u8fd9\u4e9b\u7d22\u5f15\u8986\u76d6\u7684\u8303\u56f4\uff08\u4e00\u4e2a\u524d\u5f00\u540e\u95ed\u7684\u533a\u95f4\uff0c\u5305\u62ec\u8bb0\u5f55\u672c\u8eab\uff09\uff0c\u5728\u8fd9\u4e2a\u8303\u56f4\u5185\u63d2\u5165\u90fd\u662f\u4e0d\u5141\u8bb8\u7684\uff0c\u907f\u514d\u4e86\u5176\u4ed6\u4e8b\u52a1\u5728\u8fd9\u4e2a\u8303\u56f4\u5185\u63d2\u5165\u6570\u636e\u800c\u5bfc\u81f4\u4e0d\u53ef\u91cd\u590d\u8bfb\u7684\u95ee\u9898\u3002<\/h4>\n<h4>3. \u5728SERIALIABLE\u7684\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\uff0cinnodb\u5f15\u64ce\u4f1a\u5bf9\u6bcf\u4e2aselect\u8bed\u53e5\u540e\u81ea\u52a8\u52a0\u4e0aLOCK IN SHARE MODE\uff0c\u4e3a\u6bcf\u4e2a\u8bfb\u53d6\u64cd\u4f5c\u52a0\u4e0a\u4e00\u4e2a\u5171\u4eab\u9501\uff0c\u56e0\u4e3a\u5728\u8bfb\u5360\u7528\u4e86\u9501\uff0c\u6240\u4ee5\u4e0d\u518d\u652f\u6301\u4e00\u81f4\u6027\u8bfb\u975e\u9501\u5b9a\u8bfb\u3002innodb\u5728RR\u9694\u79bb\u7ea7\u522b\u4e0b\u5c31\u53ef\u4ee5\u5230\u8fbeSQL\u6807\u51c6\u7684SERIALIABLE\u7ea7\u522b\uff0c\u56e0\u6b64\u4e00\u822c\u4e0d\u5728\u672c\u5730\u4e8b\u52a1\u4e2d\u4f7f\u7528SERIALIABLE\u7684\u9694\u79bb\u7ea7\u522b\u3002<\/h4>\n<h4>\u7efc\u4e0a\uff0cinnodb\u66f4\u52a0\u5b8c\u7f8e\u7684\u89e3\u51b3\u4e86\u5e7b\u8c61\u95ee\u9898\uff0c\u5728\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u8bbe\u7f6e\u4e3aREPEATABLE-READ\u7684\u9694\u79bb\u7ea7\u522b\u5373\u53ef\uff0c\u4e8b\u52a1\u7ea7\u522b\u8d8a\u4f4e\u6d89\u53ca\u5230\u7684\u9501\u8d8a\u5c11\uff0c\u867d\u7136REPEATABLE-READ\u7ea7\u522b\u4f1a\u5c06Record Lock\u5347\u7ea7\u4e3aNext-key lock\u9501\uff0c\u4f46\u5e76\u4e0d\u4f1a\u6bd4READ-COMMITTED\u7ea7\u522b\u6709\u6027\u80fd\u635f\u8017\u3002<\/h4>\n","protected":false},"excerpt":{"rendered":"<p>innodb\u66f4\u52a0\u5b8c\u7f8e\u7684\u89e3\u51b3\u4e86\u5e7b\u8c61\u95ee\u9898\uff0c\u5728\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u8bbe\u7f6e\u4e3aREPEATABLE-READ\u7684\u9694\u79bb\u7ea7\u522b\u5373\u53ef\uff0c\u4e8b\u52a1\u7ea7\u522b\u8d8a\u4f4e\u6d89\u53ca\u5230\u7684\u9501\u8d8a\u5c11\uff0c\u867d\u7136REPEATABLE-READ\u7ea7\u522b\u4f1a\u5c06Record Lock\u5347\u7ea7\u4e3aNext-key lock\u9501\uff0c\u4f46\u5e76\u4e0d\u4f1a\u6bd4READ-COMMITTED\u7ea7\u522b\u6709\u6027\u80fd\u635f\u8017\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-1153","post","type-post","status-publish","format-standard","hentry","category-mysql"],"_links":{"self":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts\/1153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/comments?post=1153"}],"version-history":[{"count":1,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts\/1153\/revisions"}],"predecessor-version":[{"id":1343,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts\/1153\/revisions\/1343"}],"wp:attachment":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/media?parent=1153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/categories?post=1153"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/tags?post=1153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}