{"id":15443,"date":"2024-05-31T10:19:25","date_gmt":"2024-05-31T02:19:25","guid":{"rendered":"https:\/\/92it.top\/?p=15443"},"modified":"2024-05-31T10:20:21","modified_gmt":"2024-05-31T02:20:21","slug":"mysql%e6%ad%bb%e9%94%81-%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%8c%e5%a6%82%e4%bd%95%e8%a7%a3%e5%86%b3%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=15443","title":{"rendered":"MySQL\u6b7b\u9501 \u662f\u4ec0\u4e48\uff0c\u5982\u4f55\u89e3\u51b3\uff1f"},"content":{"rendered":"\n<p>\u8f6c\u8f7d\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">https:\/\/mp.weixin.qq.com\/s?__biz=MzI2OTEzNzU3Nw==&amp;mid=2247484763&amp;idx=1&amp;sn=8aa243a7c74259f830496f19cf74b490&amp;chksm=eae5a69ddd922f8ba5281ae2e097382a13ff01cee42b561a8c43ff93d9561432ecf47fa84b38&amp;mpshare=1&amp;scene=1&amp;srcid=0531MmftWyT3jaQPNqS0RWNC&amp;sharer_shareinfo=4cf1a1a3727247e31ca4c23f261ffcc9&amp;sharer_shareinfo_first=4cf1a1a3727247e31ca4c23f261ffcc9&amp;exportkey=n_ChQIAhIQBp11Ubj7CinbVYeOisUSNhL0AQIE97dBBAEAAAAAAA1nObtisgEAAAAOpnltbLcz9gKNyK89dVj09eV889aFTEx1MfLRBVgpcmfzemgCSKNU7U1gN5SRgM%2FKtteXMjfJY%2FdZjXVs4FOk53NaxcOg3M6L2nWPMccOGRYVWY5tD4znmqCijFBU6a%2BRCW46gjDx9mt1gHaz8ECUeXTjuxrAkNn8hA1fQwmqGvdnVGgtv1Dd2XWCYTeUkz7JvYOSkLvJzok82zzjr1Ez7265t4yZniezmSyFjJ2%2BepIDl2NRZaPblBowrvJCwT2HggXLs2x%2B1xRT1x%2Bi0EJdtstCYHF%2F93eaIS9FLAw%3D&amp;acctmode=0&amp;pass_ticket=FrL1VUfMouY39ZS7HPsQ%2FfmCzit1NrwRTJuigZsOvnKuM1zV5EKJjBhbJM1jy5jc&amp;wx_header=0#rd<\/pre>\n\n\n\n<p><strong>1. \u4ec0\u4e48\u662fMySQL\u6b7b\u9501\uff1f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>MySQL\u4e2d\u7684\u6b7b\u9501\u662f\u6307\u4e24\u4e2a\u6216\u591a\u4e2a\u64cd\u4f5c\u76f8\u4e92\u7b49\u5f85\u5bf9\u65b9\u91ca\u653e\u8d44\u6e90\uff0c\u7ed3\u679c\u5bfc\u81f4\u4ed6\u4eec\u90fd\u65e0\u6cd5\u7ee7\u7eed\u6267\u884c\u7684\u60c5\u51b5\u3002<\/p>\n\n\n\n<p>\u53ef\u4ee5\u60f3\u8c61\u6210\u4e24\u4e2a\u4eba\u5404\u81ea\u62ff\u7740\u5bf9\u65b9\u9700\u8981\u7684\u4e1c\u897f\uff0c\u5374\u90fd\u50f5\u6301\u4e0d\u4e0b\uff0c\u8c01\u4e5f\u4e0d\u613f\u610f\u5148\u653e\u624b\u3002<\/p>\n\n\n\n<p>\u5728\u6570\u636e\u5e93\u64cd\u4f5c\u4e2d\uff0c\u8fd9\u901a\u5e38\u53d1\u751f\u5728\u591a\u4e2a\u4e8b\u52a1\u540c\u65f6\u8bd5\u56fe\u9501\u5b9a\u5bf9\u65b9\u5df2\u9501\u5b9a\u7684\u8d44\u6e90\u65f6\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"932\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-206-1024x932.png\" alt=\"\" class=\"wp-image-15445\" style=\"width:444px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-206-1024x932.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-206-300x273.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-206-768x699.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-206-830x755.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-206-230x209.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-206-350x318.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-206-480x437.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-206.png 1132w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p><strong>2. MySQL\u9501\u7684\u5206\u7c7b<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>MySQL\u7684\u9501\u53ef\u4ee5\u4ece\u64cd\u4f5c\u7684\u7c92\u5ea6\u8fdb\u884c\u5206\u7c7b\uff0c\u4e3b\u8981\u5305\u62ec<strong>\u8868\u7ea7\u9501<\/strong>\u3001<strong>\u884c\u7ea7\u9501<\/strong>\u548c<strong>\u9875\u7ea7\u9501<\/strong>\u3002<\/p>\n\n\n\n<p>\u4e0d\u540c\u7c7b\u578b\u7684\u9501\u5728\u6570\u636e\u5e93\u64cd\u4f5c\u4e2d\u7684\u5e94\u7528\u4f1a\u5f71\u54cd\u6570\u636e\u5e93\u7684\u6027\u80fd\u548c\u5e76\u53d1\u5904\u7406\u80fd\u529b\u3002<\/p>\n\n\n\n<p><strong>\u8868\u7ea7\u9501\uff1a<\/strong><\/p>\n\n\n\n<p>\u8868\u7ea7\u9501\u662f\u6700\u7b80\u5355\u7684\u9501\u7c7b\u578b\uff0c\u5f53\u64cd\u4f5c\u6d89\u53ca\u5230\u6574\u4e2a\u8868\u65f6\u4f7f\u7528\u3002<\/p>\n\n\n\n<p>\u8fd9\u79cd\u9501\u4f1a\u9501\u5b9a\u6574\u4e2a\u8868\uff0c\u4f7f\u5f97\u4efb\u4f55\u5176\u4ed6\u9700\u8981\u8bbf\u95ee\u8fd9\u4e2a\u8868\u7684\u64cd\u4f5c\u90fd\u5fc5\u987b\u7b49\u5f85\u9501\u88ab\u91ca\u653e\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">--\u624b\u52a8\u589e\u52a0\u8868\u9501\nlock table \u8868\u540d\u79f0 read(write),\u8868\u540d\u79f02 read(write);\n--\u67e5\u770b\u8868\u4e0a\u52a0\u8fc7\u7684\u9501\nshow open tables;\n--\u5220\u9664\u8868\u9501\nunlock tables;<\/pre>\n\n\n\n<p>\u4f18\u70b9\u662f\u7b80\u5355\u6613\u7ba1\u7406\uff0c\u4f46\u7f3a\u70b9\u662f\u5e76\u53d1\u80fd\u529b\u8f83\u4f4e\uff0c\u5c24\u5176\u5728\u5904\u7406\u5927\u91cf\u4e8b\u52a1\u65f6\uff0c\u6548\u7387\u4f1a\u5927\u5927\u964d\u4f4e\u3002<\/p>\n\n\n\n<p><strong>\u884c\u7ea7\u9501\uff1a<\/strong><\/p>\n\n\n\n<p>\u884c\u7ea7\u9501\u662f\u6700\u7cbe\u7ec6\u7684\u9501\uff0c\u53ea\u9501\u5b9a\u6570\u636e\u8868\u4e2d\u7684\u7279\u5b9a\u884c\u3002<\/p>\n\n\n\n<p><strong>\u884c\u7ea7\u9501\u7684\u7279\u70b9<\/strong>\uff1a<\/p>\n\n\n\n<ul>\n<li>\u6bcf\u6b21\u64cd\u4f5c\u9501\u4f4f\u4e00\u884c\u6570\u636e\u3002\u5f00\u9500\u5927\uff0c\u52a0\u9501\u6162\uff1b<\/li>\n\n\n\n<li>\u4f1a\u51fa\u73b0\u6b7b\u9501\uff1b<\/li>\n\n\n\n<li>\u9501\u5b9a\u7c92\u5ea6\u6700\u5c0f\uff0c\u53d1\u751f\u9501\u51b2\u7a81\u7684\u6982\u7387\u6700\u4f4e\uff0c\u5e76\u53d1\u5ea6\u6700\u9ad8\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>InnoDB\u76f8\u5bf9\u4e8eMYISAM\u7684\u6700\u5927\u4e0d\u540c\u6709\u4e24<\/strong>\u70b9\uff1a<\/p>\n\n\n\n<ul>\n<li>InnoDB\u652f\u6301\u4e8b\u52a1\uff08TRANSACTION\uff09<\/li>\n\n\n\n<li>InnoDB\u652f\u6301\u884c\u7ea7\u9501<\/li>\n<\/ul>\n\n\n\n<p>\u6ce8\u610f\uff0cInnoDB\u7684\u884c\u9501\u5b9e\u9645\u4e0a\u662f\u9488\u5bf9\u7d22\u5f15\u52a0\u7684\u9501(\u5728\u7d22\u5f15\u5bf9\u5e94\u7684\u7d22\u5f15\u9879\u4e0a\u505a\u6807\u8bb0)\uff0c\u4e0d\u662f\u9488\u5bf9\u6574\u4e2a\u884c\u8bb0\u5f55\u52a0\u7684\u9501\u3002\u5e76\u4e14\u8be5\u7d22\u5f15\u4e0d\u80fd\u5931\u6548\uff0c\u5426\u5219\u4f1a\u4ece\u884c\u9501\u5347\u7ea7\u4e3a\u8868\u9501\u3002(RR\u7ea7\u522b\u4f1a\u5347\u7ea7\u4e3a\u8868\u9501\uff0cRC\u7ea7\u522b\u4e0d\u4f1a\u5347\u7ea7\u4e3a\u8868\u9501)<\/p>\n\n\n\n<p>\u6bd4\u5982\u6211\u4eec\u5728RR\u7ea7\u522b\u6267\u884c\u5982\u4e0bsql:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">--where\u6761\u4ef6\u91cc\u7684name\u5b57\u6bb5\u65e0\u7d22\u5f15\nselect * from account where name = 'lilei' for update; <\/pre>\n\n\n\n<p>\u5219\u5176\u5b83Session\u5bf9\u8be5\u8868\u4efb\u610f\u4e00\u884c\u8bb0\u5f55\u505a\u4fee\u6539\u64cd\u4f5c\u90fd\u4f1a\u88ab\u963b\u585e\u4f4f<\/p>\n\n\n\n<p><strong>\u9875\u7ea7\u9501\uff1a<\/strong><\/p>\n\n\n\n<p>\u9875\u7ea7\u9501\u4ecb\u4e8e\u8868\u7ea7\u9501\u548c\u884c\u7ea7\u9501\u4e4b\u95f4\uff0c\u4e0d\u662fMySQL\u9ed8\u8ba4\u4f7f\u7528\u7684\u9501\u7c7b\u578b\u3002<\/p>\n\n\n\n<p>\u5b83\u9501\u5b9a\u6570\u636e\u5e93\u9875\uff08\u5373\u4e00\u7ec4\u884c\uff09\uff0c\u7c92\u5ea6\u6bd4\u8868\u7ea7\u9501\u7ec6\uff0c\u4f46\u6bd4\u884c\u7ea7\u9501\u7c97\u3002\u9875<\/p>\n\n\n\n<p>\u7ea7\u9501\u53ef\u4ee5\u51cf\u5c11\u9501\u7684\u6570\u91cf\uff0c\u4ece\u800c\u964d\u4f4e\u9501\u7ade\u4e89\uff0c\u4f46\u53ef\u80fd\u4f1a\u5f15\u8d77\u66f4\u591a\u7684\u9501\u51b2\u7a81\uff0c\u5c24\u5176\u662f\u5f53\u591a\u4e2a\u4e8b\u52a1\u9891\u7e41\u4fee\u6539\u76f8\u90bb\u7684\u6570\u636e\u65f6\u3002<\/p>\n\n\n\n<p><strong>3 \u4ece\u64cd\u4f5c\u7684\u7c7b\u578b\u8fdb\u884c\u7684mysql\u9501\u7684\u5206\u7c7b<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>\u8bfb\u9501\uff08S\u9501\uff09\uff1a<\/strong><\/p>\n\n\n\n<ul>\n<li>\u6027\u80fd\u7279\u70b9\uff1a<\/li>\n<\/ul>\n\n\n\n<p>\u8bfb\u9501\u4e5f\u88ab\u79f0\u4e3a\u5171\u4eab\u9501\uff0c\u5b83\u5141\u8bb8\u4e00\u4e2a\u4e8b\u52a1\u53bb\u8bfb\u53d6\u4e00\u884c\u6570\u636e\uff0c\u5e76\u9632\u6b62\u5176\u4ed6\u4e8b\u52a1\u5bf9\u8fd9\u884c\u6570\u636e\u8fdb\u884c\u5199\u64cd\u4f5c\uff0c\u76f4\u5230\u8bfb\u9501\u88ab\u91ca\u653e\u3002<\/p>\n\n\n\n<p>\u4f46\u662f\uff0c\u591a\u4e2a\u4e8b\u52a1\u53ef\u4ee5\u540c\u65f6\u6301\u6709\u5bf9\u540c\u4e00\u8d44\u6e90\u7684\u8bfb\u9501\uff0c\u8fd9\u610f\u5473\u7740\u591a\u4e2a\u7528\u6237\u53ef\u4ee5\u540c\u65f6\u8bfb\u53d6\u6570\u636e\uff0c\u800c\u4e0d\u4f1a\u76f8\u4e92\u5f71\u54cd\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">select * from T where id=1 lock in share mode<\/pre>\n\n\n\n<ul>\n<li>\u9002\u7528\u573a\u666f\uff1a<\/li>\n<\/ul>\n\n\n\n<p>\u9002\u7528\u4e8e\u90a3\u4e9b\u8bfb\u53d6\u64cd\u4f5c\u8fdc\u591a\u4e8e\u5199\u5165\u64cd\u4f5c\u7684\u573a\u666f\u3002<\/p>\n\n\n\n<p>\u56e0\u4e3a\u8bfb\u9501\u53ef\u4ee5\u5171\u4eab\uff0c\u5b83\u652f\u6301\u9ad8\u5e76\u53d1\u7684\u8bfb\u53d6\u64cd\u4f5c\uff0c\u4f7f\u5f97\u591a\u4e2a\u7528\u6237\u53ef\u4ee5\u540c\u65f6\u67e5\u8be2\u6570\u636e\u800c\u4e0d\u4f1a\u963b\u585e\u5f7c\u6b64\u3002<\/p>\n\n\n\n<p><strong>\u5199\u9501\uff08X\u9501\uff09\uff1a<\/strong><\/p>\n\n\n\n<ul>\n<li>\u6027\u80fd\u7279\u70b9\uff1a<\/li>\n<\/ul>\n\n\n\n<p>\u5199\u9501\u53c8\u79f0\u4e3a\u6392\u4ed6\u9501\uff0c\u5f53\u4e00\u4e2a\u4e8b\u52a1\u5bf9\u6570\u636e\u8fdb\u884c\u4fee\u6539\u65f6\uff0c\u5b83\u4f1a\u52a0\u4e0a\u5199\u9501\u3002\u8fd9\u4e2a\u9501\u4f1a\u963b\u6b62\u5176\u4ed6\u4efb\u4f55\u4e8b\u52a1\u8bfb\u53d6\u6216\u4fee\u6539\u540c\u4e00\u6570\u636e\uff0c\u76f4\u5230\u5199\u9501\u88ab\u91ca\u653e\u3002<\/p>\n\n\n\n<p>\u5199\u9501\u4fdd\u8bc1\u4e86\u6570\u636e\u5728\u4fee\u6539\u671f\u95f4\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">select * from T where id=1 for update<\/pre>\n\n\n\n<ul>\n<li>\u9002\u7528\u573a\u666f\uff1a<\/li>\n<\/ul>\n\n\n\n<p>\u9002\u7528\u4e8e\u9700\u8981\u4fee\u6539\u6570\u636e\u7684\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>\u7531\u4e8e\u5199\u9501\u4f1a\u963b\u585e\u5176\u4ed6\u6240\u6709\u8bd5\u56fe\u8bbf\u95ee\u76f8\u540c\u6570\u636e\u7684\u64cd\u4f5c\uff0c\u6240\u4ee5\u5728\u5199\u5165\u91cf\u5927\u6216\u8005\u6570\u636e\u9891\u7e41\u66f4\u65b0\u7684\u5e94\u7528\u4e2d\uff0c\u5199\u9501\u53ef\u80fd\u4f1a\u6210\u4e3a\u6027\u80fd\u74f6\u9888\u3002<\/p>\n\n\n\n<p><strong>\u610f\u5411\u9501\uff1a<\/strong><\/p>\n\n\n\n<ul>\n<li>\u6027\u80fd\u7279\u70b9\uff1a<\/li>\n<\/ul>\n\n\n\n<p>\u610f\u5411\u9501\u662f\u4e00\u79cd\u8f83\u4e3a\u7279\u6b8a\u7684\u9501\uff0c\u5b83\u4e0d\u76f4\u63a5\u9501\u5b9a\u6570\u636e\uff0c\u800c\u662f\u8868\u660e\u4e00\u4e2a\u4e8b\u52a1\u610f\u56fe\u5bf9\u6570\u636e\u884c\u8fdb\u884c\u52a0\u9501\uff08\u8bfb\u9501\u6216\u5199\u9501\uff09\u3002<\/p>\n\n\n\n<p><strong>\u610f\u5411\u9501\u4e3b\u8981\u5206\u4e3a<\/strong>\uff1a<\/p>\n\n\n\n<ul>\n<li>\u610f\u5411\u5171\u4eab\u9501\uff0cIS\u9501\uff0c\u5bf9\u6574\u4e2a\u8868\u52a0\u5171\u4eab\u9501\u4e4b\u524d\uff0c\u9700\u8981\u5148\u83b7\u53d6\u5230\u610f\u5411\u5171\u4eab\u9501\u3002<\/li>\n\n\n\n<li>\u610f\u5411\u6392\u4ed6\u9501\uff0cIX\u9501\uff0c\u5bf9\u6574\u4e2a\u8868\u52a0\u6392\u4ed6\u9501\u4e4b\u524d\uff0c\u9700\u8981\u5148\u83b7\u53d6\u5230\u610f\u5411\u6392\u4ed6\u9501\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e3b\u8981\u7528\u4e8e\u652f\u6301\u591a\u7ea7\u9501\u5b9a\u534f\u8bae\uff0c\u901a\u8fc7\u5728\u8868\u7ea7\u522b\u8bbe\u7f6e\u610f\u5411\u9501\uff0c\u6765\u9884\u544a\u5373\u5c06\u5728\u884c\u7ea7\u522b\u4e0a\u52a0\u7684\u9501\uff0c\u8fd9\u6837\u5c31\u80fd\u5728\u4e0d\u540c\u7c92\u5ea6\u7684\u9501\u4e4b\u95f4\u63d0\u4f9b\u4e00\u79cd\u517c\u5bb9\u6027\u68c0\u67e5\u3002<\/p>\n\n\n\n<ul>\n<li>\u9002\u7528\u573a\u666f\uff1a<\/li>\n<\/ul>\n\n\n\n<p>\u610f\u5411\u9501\u4e3b\u8981\u7528\u4e8e\u63d0\u9ad8\u5e76\u53d1\u6027\u80fd\uff0c\u7279\u522b\u662f\u5728\u5b58\u5728\u591a\u7c92\u5ea6\u9501\u5b9a\uff08\u5373\u540c\u65f6\u4f7f\u7528\u8868\u7ea7\u9501\u548c\u884c\u7ea7\u9501\uff09\u7684\u60c5\u51b5\u4e0b\u3002<\/p>\n\n\n\n<p>\u5b83\u5141\u8bb8\u6570\u636e\u5e93\u7cfb\u7edf\u66f4\u6709\u6548\u5730\u7ba1\u7406\u9501\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u9501\u51b2\u7a81\uff0c\u63d0\u9ad8\u64cd\u4f5c\u6548\u7387\u3002<\/p>\n\n\n\n<p><strong>4 \u4ece\u64cd\u4f5c\u7684\u6027\u80fd\u8fdb\u884c\u7684mysql\u9501\u7684\u5206\u7c7b<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u4ece\u64cd\u4f5c\u7684\u6027\u80fd\u53ef\u5206\u4e3a\u4e50\u89c2\u9501\u548c\u60b2\u89c2\u9501<\/p>\n\n\n\n<ol>\n<li><strong>\u4e50\u89c2\u9501<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n<ul>\n<li>\u6027\u80fd\u7279\u70b9\uff1a<\/li>\n<\/ul>\n\n\n\n<p>\u4e50\u89c2\u9501\u57fa\u4e8e\u8fd9\u6837\u4e00\u4e2a\u5047\u8bbe\uff0c\u5373\u51b2\u7a81\u53d1\u751f\u7684\u6982\u7387\u8f83\u4f4e\uff0c\u5927\u591a\u6570\u65f6\u95f4\u4e0d\u4f1a\u6709\u51b2\u7a81\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u5b83\u5728\u64cd\u4f5c\u8fc7\u7a0b\u4e2d\u4e0d\u4f1a\u7acb\u5373\u9501\u5b9a\u8d44\u6e90\u3002\u901a\u5e38\uff0c\u4e50\u89c2\u9501\u4f1a\u901a\u8fc7\u68c0\u67e5\u6570\u636e\u5728\u8bfb\u53d6\u548c\u66f4\u65b0\u671f\u95f4\u662f\u5426\u88ab\u4fee\u6539\u6765\u5b9e\u73b0\uff0c\u5e38\u7528\u7684\u65b9\u6cd5\u662f\u4f7f\u7528\u7248\u672c\u53f7\u6216\u65f6\u95f4\u6233\u3002\u53ea\u6709\u5728\u6570\u636e\u63d0\u4ea4\u66f4\u65b0\u65f6\uff0c\u624d\u4f1a\u68c0\u67e5\u7248\u672c\u4fe1\u606f\u662f\u5426\u4e00\u81f4\uff0c\u5982\u679c\u4e0d\u4e00\u81f4\uff0c\u8868\u793a\u6570\u636e\u5728\u6b64\u671f\u95f4\u5df2\u88ab\u5176\u4ed6\u64cd\u4f5c\u66f4\u6539\uff0c\u6b64\u65f6\u64cd\u4f5c\u4f1a\u5931\u8d25\u3002<\/p>\n\n\n\n<ul>\n<li>\u9002\u7528\u573a\u666f\uff1a<\/li>\n<\/ul>\n\n\n\n<p>\u9002\u7528\u4e8e\u8bfb\u591a\u5199\u5c11\u7684\u573a\u666f\uff0c\u6bd4\u5982\u5728\u7ebf\u9605\u8bfb\u5e73\u53f0\u7684\u7528\u6237\u6570\u636e\u5904\u7406\uff0c\u56e0\u4e3a\u5728\u8fd9\u79cd\u573a\u666f\u4e2d\uff0c\u6570\u636e\u51b2\u7a81\u7684\u53ef\u80fd\u6027\u8f83\u4f4e\uff0c\u4f7f\u7528\u4e50\u89c2\u9501\u53ef\u4ee5\u51cf\u5c11\u9501\u7684\u5f00\u9500\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6574\u4f53\u6027\u80fd\u3002<\/p>\n\n\n\n<ol start=\"2\">\n<li><strong>\u60b2\u89c2\u9501<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n<ul>\n<li>\u6027\u80fd\u7279\u70b9\uff1a<\/li>\n<\/ul>\n\n\n\n<p>\u60b2\u89c2\u9501\u6070\u6070\u76f8\u53cd\uff0c\u5b83\u5047\u8bbe\u51b2\u7a81\u5f88\u5e38\u89c1\uff0c\u56e0\u6b64\u5728\u6574\u4e2a\u6570\u636e\u5904\u7406\u8fc7\u7a0b\u4e2d\u4f1a\u4fdd\u6301\u6570\u636e\u9501\u5b9a\uff0c\u76f4\u5230\u4e8b\u52a1\u5b8c\u6210\u3002<\/p>\n\n\n\n<p>\u8fd9\u610f\u5473\u7740\u5f53\u4e00\u4e2a\u4e8b\u52a1\u5728\u64cd\u4f5c\u6570\u636e\u65f6\uff0c\u5176\u4ed6\u4e8b\u52a1\u5fc5\u987b\u7b49\u5f85\u76f4\u5230\u9501\u88ab\u91ca\u653e\u3002\u60b2\u89c2\u9501\u53ef\u4ee5\u901a\u8fc7\u6570\u636e\u5e93\u81ea\u5e26\u7684\u9501\u673a\u5236\u5b9e\u73b0\uff0c\u6bd4\u5982\u884c\u9501\u6216\u8868\u9501\u3002<\/p>\n\n\n\n<ul>\n<li>\u9002\u7528\u573a\u666f\uff1a<\/li>\n<\/ul>\n\n\n\n<p>\u9002\u5408\u5199\u64cd\u4f5c\u591a\u7684\u573a\u666f\uff0c\u6bd4\u5982\u94f6\u884c\u8d26\u6237\u5904\u7406\uff0c\u5728\u8fd9\u79cd\u573a\u666f\u4e0b\uff0c\u6570\u636e\u5b89\u5168\u548c\u4e00\u81f4\u6027\u6bd4\u6027\u80fd\u66f4\u4e3a\u91cd\u8981\u3002\u60b2\u89c2\u9501\u901a\u8fc7\u9501\u5b9a\u6570\u636e\u6765\u907f\u514d\u6570\u636e\u5728\u591a\u4e2a\u4e8b\u52a1\u95f4\u7684\u51b2\u7a81\uff0c\u786e\u4fdd\u6570\u636e\u64cd\u4f5c\u7684\u5b89\u5168\u6027\u3002<\/p>\n\n\n\n<p><strong>5 &nbsp;InnoDB\u5b58\u50a8\u5f15\u64ce\u4e09\u79cd\u884c\u9501\u6a21\u5f0f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u5f53\u6211\u4eec\u8c08\u8bbaInnoDB\u5b58\u50a8\u5f15\u64ce\u4e2d\u7684\u884c\u9501\u6a21\u5f0f\u65f6\uff0c\u53ef\u4ee5\u628a\u5b83\u60f3\u8c61\u6210\u4e00\u79cd\u786e\u4fdd\u6570\u636e\u5e93\u4e2d\u6570\u636e\u5b89\u5168\u548c\u51c6\u786e\u7684\u673a\u5236\u3002\u8fd9\u91cc\u6709\u4e09\u79cd\u4e3b\u8981\u7684\u884c\u9501\u6a21\u5f0f\uff0c\u5206\u522b\u662f\u8bb0\u5f55\u9501\u3001\u95f4\u9699\u9501\u548c\u4e34\u952e\u9501\u3002<\/p>\n\n\n\n<p>\u5f53\u6211\u4eec\u8c08\u8bbaInnoDB\u5b58\u50a8\u5f15\u64ce\u4e2d\u7684\u884c\u9501\u6a21\u5f0f\u65f6\uff0c\u53ef\u4ee5\u628a\u5b83\u60f3\u8c61\u6210\u4e00\u79cd\u786e\u4fdd\u6570\u636e\u5e93\u4e2d\u6570\u636e\u5b89\u5168\u548c\u51c6\u786e\u7684\u673a\u5236\u3002\u8fd9\u91cc\u6709\u4e09\u79cd\u4e3b\u8981\u7684\u884c\u9501\u6a21\u5f0f\uff0c\u5206\u522b\u662f\u8bb0\u5f55\u9501\u3001\u95f4\u9699\u9501\u548c\u4e34\u952e\u9501\u3002<\/p>\n\n\n\n<p><strong>5.1\u3001\u8bb0\u5f55\u9501\uff08Record Locks\uff09\uff1a<\/strong><\/p>\n\n\n\n<p>\u8bb0\u5f55\u9501\u662f\u6700\u76f4\u63a5\u7684\u4e00\u79cd\u9501\u3002\u5b83\u5c31\u50cf\u662f\u7ed9\u6570\u636e\u5e93\u4e2d\u67d0\u6761\u5177\u4f53\u6570\u636e\u4e0a\u4e86\u4e00\u628a\u9501\u3002<\/p>\n\n\n\n<p>\u8fd9\u79cd\u9501\u5b9a\u7684\u76ee\u7684\u662f\u4e3a\u4e86\u9632\u6b62\u5176\u4ed6\u7528\u6237\u5728\u4e8b\u52a1\u5904\u7406\u671f\u95f4\u4fee\u6539\u8fd9\u6761\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u6bd4\u5982\u8bf4\uff0c\u5982\u679c\u4f60\u6b63\u5728\u66f4\u65b0\u4e00\u6761\u8bb0\u5f55\uff0c\u7cfb\u7edf\u5c31\u4f1a\u5bf9\u8fd9\u6761\u8bb0\u5f55\u52a0\u9501\uff0c\u786e\u4fdd\u6ca1\u6709\u5176\u4ed6\u4eba\u80fd\u591f\u540c\u65f6\u4fee\u6539\u8fd9\u6761\u8bb0\u5f55\uff0c\u76f4\u5230\u4f60\u7684\u4e8b\u52a1\u5b8c\u6210\u3002<\/p>\n\n\n\n<p><strong>5.2\u3001\u95f4\u9699\u9501\uff08Gap Locks\uff09\uff1a<\/strong><\/p>\n\n\n\n<p>\u95f4\u9699\u9501\u4e0d\u662f\u9501\u5b9a\u5355\u4e2a\u8bb0\u5f55\uff0c\u800c\u662f\u9501\u5b9a\u4e00\u4e2a\u8303\u56f4\uff0c\u4f46\u8fd9\u4e2a\u8303\u56f4\u4e0d\u5305\u62ec\u5b9e\u9645\u7684\u8bb0\u5f55\u3002<\/p>\n\n\n\n<p>\u60f3\u8c61\u4e00\u4e0b\uff0c\u4f60\u60f3\u5728\u4e24\u6761\u5df2\u6709\u8bb0\u5f55\u4e4b\u95f4\u63d2\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c\u95f4\u9699\u9501\u5c31\u4f1a\u9632\u6b62\u5176\u4ed6\u4e8b\u52a1\u63d2\u5165\u5230\u8fd9\u4e24\u6761\u8bb0\u5f55\u4e4b\u95f4\u7684\u7a7a\u9699\u91cc\u3002<\/p>\n\n\n\n<p>Mysql\u9ed8\u8ba4\u7ea7\u522b\u662frepeatable-read\uff0c\u6709\u5e7b\u8bfb\u95ee\u9898\uff0c\u95f4\u9699\u9501\u662f\u53ef\u4ee5\u89e3\u51b3\u5e7b\u8bfb\u95ee\u9898\u7684\u3002<\/p>\n\n\n\n<p>\u5047\u8bbeaccount\u8868\u91cc\u6570\u636e\u5982\u4e0b\uff1a<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"716\" height=\"386\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-207.png\" alt=\"\" class=\"wp-image-15446\" style=\"width:372px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-207.png 716w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-207-300x162.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-207-230x124.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-207-350x189.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-207-480x259.png 480w\" sizes=\"(max-width: 716px) 100vw, 716px\" \/><\/figure><\/div>\n\n\n<p>\u90a3\u4e48\u95f4\u9699\u5c31\u6709 id \u4e3a (3,10)\uff0c(10,20)\uff0c(20,\u6b63\u65e0\u7a77) \u8fd9\u4e09\u4e2a\u533a\u95f4\uff0c\u5728Session_1\u4e0b\u9762\u6267\u884c\u5982\u4e0bsql\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">select * from account where id = 18 for update;<\/pre>\n\n\n\n<p>\u5219\u5176\u4ed6Session\u6ca1\u6cd5\u5728\u8fd9\u4e2a(10,20)\u8fd9\u4e2a\u95f4\u9699\u8303\u56f4\u91cc\u63d2\u5165\u4efb\u4f55\u6570\u636e\u3002<br>\u5982\u679c\u6267\u884c\u4e0b\u9762\u8fd9\u6761sql\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">select * from account where id = 25 for update;<\/pre>\n\n\n\n<p>\u5219\u5176\u4ed6Session\u6ca1\u6cd5\u5728\u8fd9\u4e2a(20,\u6b63\u65e0\u7a77)\u8fd9\u4e2a\u95f4\u9699\u8303\u56f4\u91cc\u63d2\u5165\u4efb\u4f55\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c\u53ea\u8981\u5728\u95f4\u9699\u8303\u56f4\u5185\u9501\u4e86\u4e00\u6761\u4e0d\u5b58\u5728\u7684\u8bb0\u5f55\u4f1a\u9501\u4f4f\u6574\u4e2a\u95f4\u9699\u8303\u56f4\uff0c\u4e0d\u9501\u8fb9\u754c\u8bb0\u5f55\uff0c\u8fd9\u6837\u5c31\u80fd\u9632\u6b62\u5176\u5b83Session\u5728\u8fd9\u4e2a\u95f4\u9699\u8303\u56f4\u5185\u63d2\u5165\u6570\u636e\uff0c\u5c31\u89e3\u51b3\u4e86\u53ef\u91cd\u590d\u8bfb\u9694\u79bb\u7ea7\u522b\u7684\u5e7b\u8bfb\u95ee\u9898\u3002<\/p>\n\n\n\n<p><strong>5.3\u3001\u4e34\u952e\u9501\uff08Next-Key Locks\uff09\uff1a<\/strong><\/p>\n\n\n\n<p>\u4e34\u952e\u9501\u662f\u8bb0\u5f55\u9501\u548c\u95f4\u9699\u9501\u7684\u7ed3\u5408\u4f53\u3002\u5b83\u540c\u65f6\u9501\u5b9a\u4e00\u6761\u8bb0\u5f55\u548c\u5b83\u524d\u9762\u7684\u7a7a\u9699\u3002<\/p>\n\n\n\n<p>\u8fd9\u79cd\u9501\u7684\u4f5c\u7528\u662f\uff0c\u5b83\u4e0d\u4ec5\u9632\u6b62\u5176\u4ed6\u7528\u6237\u4fee\u6539\u5f53\u524d\u7684\u8bb0\u5f55\uff0c\u8fd8\u9632\u6b62\u4ed6\u4eec\u5728\u524d\u9762\u7684\u7a7a\u9699\u4e2d\u6dfb\u52a0\u65b0\u8bb0\u5f55\u3002<\/p>\n\n\n\n<p>\u8fd9\u79cd\u9501\u6a21\u5f0f\u662fInnoDB\u7528\u6765\u4fdd\u6301\u6570\u636e\u5b8c\u6574\u6027\u548c\u907f\u514d\u5e7b\u8bfb\uff08\u5373\u5728\u4e00\u4e2a\u4e8b\u52a1\u5185\u8bfb\u53d6\u5230\u4e4b\u524d\u4e0d\u5b58\u5728\u7684\u6570\u636e\u884c\uff09\u7684\u4e00\u79cd\u65b9\u5f0f\u3002<\/p>\n\n\n\n<p><strong>6 \u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u548c\u9501\u7684\u5173\u7cfb<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>6.1 \u6570\u636e\u5e93\u4e8b\u52a1\u7684\u9694\u79bb\u7ea7\u522b<\/strong><\/p>\n\n\n\n<p>\u636e\u5e93\u4e8b\u52a1\u7684\u9694\u79bb\u7ea7\u522b\uff0c\u76ee\u524d\u6570\u636e\u5e93\u4e8b\u52a1\u7684\u9694\u79bb\u7ea7\u522b\u4e00\u5171\u6709 4 \u79cd\uff0c\u7531\u4f4e\u5230\u9ad8\u5206\u522b\u4e3a\uff1a<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"256\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-208-1024x256.png\" alt=\"\" class=\"wp-image-15447\" style=\"width:566px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-208-1024x256.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-208-300x75.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-208-768x192.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-208-830x208.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-208-230x58.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-208-350x88.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-208-480x120.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-208.png 1238w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p><strong>\u4e8b\u52a1\u7684\u56db\u4e2a\u9694\u79bb\u7ea7\u522b<\/strong>\uff1a<\/p>\n\n\n\n<ul>\n<li><strong>\u672a\u63d0\u4ea4\u8bfb\uff08READ UNCOMMITTED\uff09<\/strong>\uff1a<br>\u6240\u6709\u4e8b\u52a1\u90fd\u53ef\u4ee5\u770b\u5230\u5176\u4ed6\u4e8b\u52a1\u672a\u63d0\u4ea4\u7684\u4fee\u6539\u3002\u4e00\u822c\u5f88\u5c11\u4f7f\u7528\uff1b<\/li>\n\n\n\n<li><strong>\u8bfb\u5df2\u63d0\u4ea4\uff08READ COMMITTED\uff09<\/strong>\uff1a<br>Oracle\u9ed8\u8ba4\u9694\u79bb\u7ea7\u522b\uff0c\u4e8b\u52a1\u4e4b\u95f4\u53ea\u80fd\u770b\u5230\u5f7c\u6b64\u5df2\u63d0\u4ea4\u7684\u53d8\u66f4\u4fee\u6539\uff1b<\/li>\n\n\n\n<li><strong>\u53ef\u91cd\u590d\u8bfb\uff08REPEATABLE READ\uff09<\/strong>\uff1a<br>MySQL\u9ed8\u8ba4\u9694\u79bb\u7ea7\u522b\uff0c\u540c\u4e00\u4e8b\u52a1\u4e2d\u7684\u591a\u6b21\u67e5\u8be2\u4f1a\u770b\u5230\u76f8\u540c\u7684\u6570\u636e\u884c\uff1b\u53ef\u4ee5\u89e3\u51b3\u4e0d\u53ef\u91cd\u590d\u8bfb\uff0c\u4f46\u53ef\u80fd\u51fa\u73b0\u5e7b\u8bfb\uff1b<\/li>\n\n\n\n<li><strong>\u53ef\u4e32\u884c\u5316\uff08SERIALIZABLE\uff09<\/strong>\uff1a<br>\u6700\u9ad8\u7684\u9694\u79bb\u7ea7\u522b\uff0c\u4e8b\u52a1\u4e32\u884c\u7684\u6267\u884c\uff0c\u524d\u4e00\u4e2a\u4e8b\u52a1\u6267\u884c\u5b8c\uff0c\u540e\u9762\u7684\u4e8b\u52a1\u4f1a\u6267\u884c\u3002\u8bfb\u53d6\u6bcf\u6761\u6570\u636e\u90fd\u4f1a\u52a0\u9501\uff0c\u4f1a\u5bfc\u81f4\u5927\u91cf\u7684\u8d85\u65f6\u548c\u9501\u4e89\u7528\u95ee\u9898\uff1b<\/li>\n<\/ul>\n\n\n\n<p>\u6570\u636e\u5e93\u4e00\u822c\u9ed8\u8ba4\u7684\u9694\u79bb\u7ea7\u522b\u4e3a \u8bfb\u5df2\u63d0\u4ea4 RC \uff0c\u6bd4\u5982 Oracle\uff0c<\/p>\n\n\n\n<p>\u4e5f\u6709\u4e00\u4e9b\u6570\u636e\u7684\u9ed8\u8ba4\u9694\u79bb\u7ea7\u522b\u4e3a \u53ef\u91cd\u590d\u8bfb RR\uff0c\u6bd4\u5982 Mysql\u3002<\/p>\n\n\n\n<p>&#8220;\u53ef\u91cd\u590d\u8bfb&#8221;\uff08Repeatable Read\uff09\u8fd9\u4e2a\u7ea7\u522b\u786e\u4fdd\u4e86\u5bf9\u540c\u4e00\u5b57\u6bb5\u7684\u591a\u6b21\u8bfb\u53d6\u7ed3\u679c\u662f\u4e00\u81f4\u7684\uff0c\u9664\u975e\u6570\u636e\u662f\u88ab\u672c\u8eab\u4e8b\u52a1\u81ea\u5df1\u6240\u4fee\u6539\u3002<\/p>\n\n\n\n<p>RR\u5b83\u80fd\u591f\u9632\u6b62\u810f\u8bfb\u3001\u4e0d\u53ef\u91cd\u590d\u8bfb\uff0c\u4f46\u53ef\u80fd\u4f1a\u9047\u5230\u5e7b\u8bfb\u7684\u60c5\u51b5\u3002<\/p>\n\n\n\n<p><strong>6.2 \u6df1\u5165\u63a2\u8ba8\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u4e0e\u9501\u4e4b\u95f4\u7684\u5173\u8054<\/strong><\/p>\n\n\n\n<p>\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\uff0c\u6e90\u4e8eSQL92\u6807\u51c6\uff0c\u4e3a\u6570\u636e\u5e93\u4e8b\u52a1\u7684\u5e76\u53d1\u63a7\u5236\u63d0\u4f9b\u4e86\u4e00\u79cd\u5168\u9762\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n\n\n\n<p>\u5b83\u5b9e\u8d28\u4e0a\u662f\u5c06\u9501\u673a\u5236\u548cMVCC\uff08\u591a\u7248\u672c\u5e76\u53d1\u63a7\u5236\uff09\u6280\u672f\u8fdb\u884c\u4e86\u5c01\u88c5\uff0c\u4ece\u800c\u7b80\u5316\u4e86\u5e95\u5c42\u5b9e\u73b0\u7684\u590d\u6742\u6027\uff0c\u4e3a\u7528\u6237\u63d0\u4f9b\u4e86\u4e00\u4e2a\u66f4\u52a0\u53cb\u597d\u7684\u63a5\u53e3\u3002<\/p>\n\n\n\n<p>\u9501\uff0c\u4f5c\u4e3a\u6570\u636e\u5e93\u5b9e\u73b0\u5e76\u53d1\u8bbf\u95ee\u63a7\u5236\u7684\u6838\u5fc3\u673a\u5236\uff0c\u786e\u4fdd\u4e86\u4e8b\u52a1\u7684\u9694\u79bb\u6027\u3002<\/p>\n\n\n\n<p>\u901a\u8fc7\u4e3a\u4e0d\u540c\u7684\u6570\u636e\u64cd\u4f5c\u65bd\u52a0\u76f8\u5e94\u7684\u9501\uff0c\u6570\u636e\u5e93\u80fd\u591f\u9632\u6b62\u591a\u4e2a\u4e8b\u52a1\u540c\u65f6\u8bfb\u5199\u540c\u4e00\u6570\u636e\uff0c\u4ece\u800c\u7ef4\u62a4\u6570\u636e\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/p>\n\n\n\n<p>\u5bf9\u4e8e\u5f00\u53d1\u8005\u800c\u8a00\uff0c\u4ed6\u4eec\u901a\u5e38\u9996\u5148\u9009\u62e9\u4e00\u4e2a\u5408\u9002\u7684\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u3002\u4ec5\u5f53\u6240\u9009\u7684\u9694\u79bb\u7ea7\u522b\u65e0\u6cd5\u6ee1\u8db3\u7279\u5b9a\u7684\u5e76\u53d1\u9700\u6c42\u6216\u89e3\u51b3\u95ee\u9898\u65f6\uff0c\u624d\u9700\u8981\u8003\u8651\u5728\u4ee3\u7801\u4e2d\u663e\u5f0f\u5730\u4f7f\u7528\u9501\u8fdb\u884c\u66f4\u7cbe\u7ec6\u7684\u63a7\u5236\u3002<\/p>\n\n\n\n<p>\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0cMySQL\u7684\u9ed8\u8ba4\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u662f\u201c\u53ef\u91cd\u590d\u8bfb\u201d\uff0c\u4f46\u6839\u636e\u5b9e\u9645\u7684\u5e94\u7528\u9700\u6c42\uff0c\u201c\u8bfb\u5df2\u63d0\u4ea4\u201d\u9694\u79bb\u7ea7\u522b\u4e5f\u5e38\u88ab\u63a8\u8350\uff0c\u56e0\u4e3a\u5b83\u5728\u5e76\u53d1\u63a7\u5236\u548c\u6027\u80fd\u4e4b\u95f4\u8fbe\u5230\u4e86\u8f83\u597d\u7684\u5e73\u8861\u3002<\/p>\n\n\n\n<p>\u76f8\u6bd4\u4e4b\u4e0b\uff0cOracle\u548cSQLServer\u7684\u9ed8\u8ba4\u9694\u79bb\u7ea7\u522b\u5219\u662f\u201c\u8bfb\u5df2\u63d0\u4ea4\u201d\u3002<\/p>\n\n\n\n<p><strong>7 \u6b7b\u9501\u4ea7\u751f\u539f\u56e0\u548c\u89e3\u51b3\u65b9\u6848<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>InnoDB\u4e0eMyISAM\u7684\u6700\u5927\u4e0d\u540c\u6709\u4e24\u70b9<\/p>\n\n\n\n<ul>\n<li>\u652f\u6301\u4e8b\u52a1<\/li>\n\n\n\n<li>\u91c7\u7528\u884c\u9501 \u884c\u7ea7\u9501\u548c\u8868\u7ea7\u9501\u672c\u6765\u5c31\u6709\u8bb8\u591a\u4e0d\u540c\u4e4b\u5904\uff0c\u53e6\u5916\uff0c\u4e8b\u52a1\u7684\u5f15\u5165\u4e5f\u5e26\u6765\u4e86\u4e00\u4e9b\u95ee\u9898 \uff0c\u6bd4\u5982 <strong>\u6b7b\u9501<\/strong>\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>7.1\u3001\u8868\u7ea7\u9501\u6b7b\u9501<\/strong><\/p>\n\n\n\n<p>\u5047\u8bbe\u6709\u4e24\u4e2a\u4e8b\u52a1\uff0c\u5206\u522b\u5728\u64cd\u4f5c\u4e24\u4e2a\u8868\uff1a\u8868A\u548c\u8868B\u3002<br>\u4e8b\u52a11\u8bd5\u56fe\u5148\u9501\u5b9a\u8868A\uff0c\u7136\u540e\u9501\u5b9a\u8868B\u3002<br>\u800c\u4e8b\u52a12\u8bd5\u56fe\u5148\u9501\u5b9a\u8868B\uff0c\u7136\u540e\u9501\u5b9a\u8868A\u3002<br>\u7528\u6237A\u548c\u7528\u6237B\u52a0\u9501\u7684\u987a\u5e8f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul>\n<li>\u7528\u6237A&#8211;\u300b\u88681\uff08\u8868\u9501\uff09&#8211;\u300b\u88682\uff08\u8868\u9501\uff09<\/li>\n\n\n\n<li>\u7528\u6237B&#8211;\u300b\u88682\uff08\u8868\u9501\uff09&#8211;\u300b\u88681\uff08\u8868\u9501\uff09<\/li>\n<\/ul>\n\n\n\n<p>\u5982\u679c\u8fd9\u4e24\u4e2a\u4e8b\u52a1\u540c\u65f6\u6267\u884c\uff0c\u5b83\u4eec\u5c06\u4f1a\u76f8\u4e92\u7b49\u5f85\u5bf9\u65b9\u91ca\u653e\u9501\uff0c\u4ece\u800c\u5bfc\u81f4\u6b7b\u9501\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"766\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-209-1024x766.png\" alt=\"\" class=\"wp-image-15448\" style=\"width:398px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-209-1024x766.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-209-300x224.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-209-768x574.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-209-830x621.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-209-230x172.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-209-350x262.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-209-480x359.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2024\/05\/\u56fe\u7247-209.png 1174w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<ul>\n<li><strong>\u89e3\u51b3\u65b9\u6848<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u79cd\u6b7b\u9501\u6bd4\u8f83\u5e38\u89c1\uff0c\u662f\u7531\u4e8e\u7a0b\u5e8f\u7684BUG\u4ea7\u751f\u7684\uff0c\u9664\u4e86\u8c03\u6574\u7684\u7a0b\u5e8f\u7684\u903b\u8f91\u6ca1\u6709\u5176\u5b83\u7684\u529e\u6cd5\u3002<\/p>\n\n\n\n<ol>\n<li>\u4ed4\u7ec6\u5206\u6790\u7a0b\u5e8f\u7684\u903b\u8f91\uff0c\u5bf9\u4e8e\u6570\u636e\u5e93\u7684\u591a\u8868\u64cd\u4f5c\u65f6\uff0c\u5c3d\u91cf\u6309\u7167\u76f8\u540c\u7684\u987a\u5e8f\u8fdb\u884c\u5904\u7406\uff0c<\/li>\n\n\n\n<li>\u5c3d\u91cf\u907f\u514d\u540c\u65f6\u9501\u5b9a\u4e24\u4e2a\u8d44\u6e90\uff0c\u5982\u64cd\u4f5cA\u548cB\u4e24\u5f20\u8868\u65f6\uff0c\u603b\u662f\u6309\u5148A\u540eB\u7684\u987a\u5e8f\u5904\u7406\uff0c \u5fc5\u987b\u540c\u65f6\u9501\u5b9a\u4e24\u4e2a\u8d44\u6e90\u65f6\uff0c\u8981\u4fdd\u8bc1\u5728\u4efb\u4f55\u65f6\u523b\u90fd\u5e94\u8be5\u6309\u7167\u76f8\u540c\u7684\u987a\u5e8f\u6765\u9501\u5b9a\u8d44\u6e90\u3002<\/li>\n<\/ol>\n\n\n\n<p><strong>7.2\u3001\u884c\u7ea7\u9501\u6b7b\u9501<\/strong><\/p>\n\n\n\n<p><strong>\u4ea7\u751f\u539f\u56e01<\/strong><\/p>\n\n\n\n<p>\u5982\u679c\u5728\u4e8b\u52a1\u4e2d\u6267\u884c\u4e86\u4e00\u6761\u6ca1\u6709\u7d22\u5f15\u6761\u4ef6\u7684\u67e5\u8be2\uff0c\u5f15\u53d1\u5168\u8868\u626b\u63cf\uff0c\u884c\u9501 \u81a8\u80c0 \u4e3a\u8868\u9501\uff08 \u6216\u8005\u7b49\u4ef7\u4e8e \u8868\u7ea7\u9501\uff09<\/p>\n\n\n\n<p>\u591a\u4e2a\u8fd9\u6837\u7684 \u9501\u8868\u4e8b\u52a1 \u6267\u884c\u540e\uff0c\u5c31\u5f88\u5bb9\u6613\u4ea7\u751f\u6b7b\u9501\u548c\u963b\u585e\uff0c\u6700\u7ec8\u5e94\u7528\u7cfb\u7edf\u4f1a\u8d8a\u6765\u8d8a\u6162\uff0c\u53d1\u751f\u963b\u585e\u6216 \u6b7b\u9501\u3002<\/p>\n\n\n\n<ul>\n<li><strong>\u89e3\u51b3\u65b9\u6848<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n<ol>\n<li>SQL\u8bed\u53e5\u4e2d\u4e0d\u8981\u4f7f\u7528\u592a\u590d\u6742\u7684\u5173\u8054\u591a\u8868\u7684\u67e5\u8be2\uff1b<\/li>\n\n\n\n<li>\u4f7f\u7528explain\u201c\u6267\u884c\u8ba1\u5212&#8221;\u5bf9SQL\u8bed\u53e5\u8fdb\u884c\u5206\u6790\uff0c\u5bf9\u4e8e\u6709\u5168\u8868\u626b\u63cf\u548c\u5168\u8868\u9501\u5b9a\u7684SQL\u8bed\u53e5\uff0c\u5efa\u7acb\u76f8\u5e94\u7684\u7d22\u5f15\u8fdb\u884c\u4f18\u5316\u3002<\/li>\n<\/ol>\n\n\n\n<p><strong>\u4ea7\u751f\u539f\u56e02<\/strong><\/p>\n\n\n\n<p>\u4e24\u4e2a\u4e8b\u52a1\u5206\u522b\u60f3\u62ff\u5230\u5bf9\u65b9\u6301\u6709\u7684\u9501\uff0c\u4e92\u76f8\u7b49\u5f85\uff0c\u4e8e\u662f\u4ea7\u751f\u6b7b\u9501 \u4f8b\u5982\uff1a\u6a21\u62df\u6b7b\u9501\u573a\u666f<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">set tx_isolation='repeatable-read';\nSession_1\u6267\u884c\uff1aselect * from account where id=1 for update;\nSession_2\u6267\u884c\uff1aselect * from account where id=2 for update;\nSession_1\u6267\u884c\uff1aselect * from account where id=2 for update;\nSession_2\u6267\u884c\uff1aselect * from account where id=1 for update;<\/pre>\n\n\n\n<p>\u5f53\u51fa\u73b0\u6b7b\u9501\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u67e5\u770b\u8fd1\u671f\u7684\u6b7b\u9501\u65e5\u5fd7\uff0c\u6765\u786e\u5b9a\u6b7b\u9501\u7684\u8be6\u7ec6\u4fe1\u606f \u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\u67e5\u770b\u8fd1\u671f\u6b7b\u9501\u65e5\u5fd7\u4fe1\u606f\uff1ashow engine innodb status; <\/pre>\n\n\n\n<p>\u5927\u591a\u6570\u60c5\u51b5mysql\u53ef\u4ee5\u81ea\u52a8\u68c0\u6d4b\u6b7b\u9501\u5e76\u56de\u6eda\u4ea7\u751f\u6b7b\u9501\u7684\u90a3\u4e2a\u4e8b\u52a1\uff0c\u4f46\u662f\u6709\u4e9b\u60c5\u51b5mysql\u6ca1\u6cd5\u81ea\u52a8\u68c0\u6d4b\u6b7b\u9501\uff0c\u8fd9\u79cd\u60c5\u51b5\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u65e5\u5fd7\u5206\u6790\u627e\u5230\u5bf9\u5e94\u4e8b\u52a1\u7ebf\u7a0bid\uff0c\u53ef\u4ee5\u901a\u8fc7kill\u6740\u6389<\/p>\n\n\n\n<p><strong>7.3\u3001\u9884\u9632\u6b7b\u9501\u4f18\u5316\u5b9e\u8df5<\/strong><\/p>\n\n\n\n<p><strong>1. \u7ef4\u6301\u4e00\u81f4\u7684\u9501\u5b9a\u987a\u5e8f<\/strong><\/p>\n\n\n\n<p>\u786e\u4fdd\u6240\u6709\u4e8b\u52a1\u90fd\u4ee5\u76f8\u540c\u7684\u987a\u5e8f\u83b7\u53d6\u9501\u3002\u8fd9\u53ef\u4ee5\u51cf\u5c11\u9501\u5b9a\u51b2\u7a81\u7684\u53ef\u80fd\u6027\uff0c\u56e0\u4e3a\u4e8b\u52a1\u4e0d\u4f1a\u56e0\u4e3a\u7b49\u5f85\u5176\u4ed6\u4e8b\u52a1\u91ca\u653e\u9501\u800c\u76f8\u4e92\u963b\u585e\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u6709\u591a\u4e2a\u8868\u6216\u8d44\u6e90\u9700\u8981\u9501\u5b9a\uff0c\u603b\u662f\u6309\u7167\u76f8\u540c\u7684\u987a\u5e8f\uff08\u5982\u5b57\u5178\u987a\u5e8f\uff09\u9501\u5b9a\u8fd9\u4e9b\u8d44\u6e90\u3002<\/p>\n\n\n\n<p><strong>2. \u4f7f\u7528\u6700\u5c0f\u7684\u9501\u7c92\u5ea6<\/strong><\/p>\n\n\n\n<p>\u5c3d\u91cf\u4f7f\u7528\u884c\u7ea7\u9501\u800c\u4e0d\u662f\u8868\u7ea7\u9501\u3002<\/p>\n\n\n\n<p>\u884c\u7ea7\u9501\u5141\u8bb8\u66f4\u9ad8\u7684\u5e76\u53d1\uff0c\u56e0\u4e3a\u5b83\u4ec5\u9501\u5b9a\u9700\u8981\u4fee\u6539\u6216\u67e5\u8be2\u7684\u6570\u636e\u884c\uff0c\u800c\u4e0d\u662f\u6574\u4e2a\u8868\u3002\u8fd9\u6837\uff0c\u5373\u4f7f\u591a\u4e2a\u4e8b\u52a1\u64cd\u4f5c\u540c\u4e00\u8868\uff0c\u5b83\u4eec\u4e5f\u53ef\u80fd\u64cd\u4f5c\u4e0d\u540c\u7684\u884c\uff0c\u4ece\u800c\u51cf\u5c11\u6b7b\u9501\u7684\u98ce\u9669\u3002<\/p>\n\n\n\n<p><strong>3. \u51cf\u5c11\u4e8b\u52a1\u6301\u7eed\u65f6\u95f4<\/strong><\/p>\n\n\n\n<p>\u5c3d\u91cf\u7f29\u77ed\u4e8b\u52a1\u7684\u6267\u884c\u65f6\u95f4\u3002<\/p>\n\n\n\n<p>\u957f\u4e8b\u52a1\u5360\u7528\u9501\u7684\u65f6\u95f4\u8d8a\u957f\uff0c\u4e0e\u5176\u4ed6\u4e8b\u52a1\u53d1\u751f\u51b2\u7a81\u7684\u53ef\u80fd\u6027\u5c31\u8d8a\u5927\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u4f18\u5316\u67e5\u8be2\u8bed\u53e5\u548c\u51cf\u5c11\u4e8b\u52a1\u4e2d\u7684\u64cd\u4f5c\u6570\u6765\u51cf\u5c11\u4e8b\u52a1\u6301\u7eed\u65f6\u95f4\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>4. \u4f7f\u7528\u9501\u8d85\u65f6<\/strong><\/h4>\n\n\n\n<p>\u5728\u67d0\u4e9b\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\u4e2d\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u9501\u7684\u8d85\u65f6\u65f6\u95f4\u3002<\/p>\n\n\n\n<p>\u8fd9\u610f\u5473\u7740\u4e8b\u52a1\u5728\u7b49\u5f85\u9501\u8d85\u8fc7\u8bbe\u5b9a\u7684\u65f6\u95f4\u540e\u5c06\u81ea\u52a8\u56de\u6eda\u3002\u8fd9\u4e0d\u4ec5\u53ef\u4ee5\u9632\u6b62\u6b7b\u9501\uff0c\u8fd8\u53ef\u4ee5\u907f\u514d\u4e00\u4e2a\u4e8b\u52a1\u65e0\u9650\u671f\u5730\u7b49\u5f85\u8d44\u6e90\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>5. \u6b7b\u9501\u68c0\u6d4b\u548c\u56de\u6eda<\/strong><\/h4>\n\n\n\n<p>\u542f\u7528\u6570\u636e\u5e93\u7684\u6b7b\u9501\u68c0\u6d4b\u529f\u80fd\uff0c\u8ba9\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\u80fd\u591f\u81ea\u52a8\u68c0\u6d4b\u6b7b\u9501\u5e76\u56de\u6eda\u67d0\u4e2a\u4e8b\u52a1\u6765\u89e3\u9501\u3002<\/p>\n\n\n\n<p>\u8fd9\u901a\u5e38\u662f\u6700\u540e\u7684\u624b\u6bb5\uff0c\u56e0\u4e3a\u5b83\u53ef\u80fd\u5bfc\u81f4\u6570\u636e\u4e0d\u4e00\u81f4\u7684\u95ee\u9898\u3002\u5e94\u5f53\u53ea\u5728\u5176\u4ed6\u65b9\u6cd5\u90fd\u65e0\u6cd5\u5b9e\u73b0\u65f6\u4f7f\u7528\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>6. \u907f\u514d\u4e0d\u5fc5\u8981\u7684\u9501<\/strong><\/h4>\n\n\n\n<p>\u5ba1\u67e5\u548c\u4f18\u5316\u4e8b\u52a1\u903b\u8f91\uff0c\u786e\u4fdd\u53ea\u9501\u5b9a\u5fc5\u8981\u7684\u8d44\u6e90\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u4e8b\u52a1\u53ea\u8bfb\u53d6\u6570\u636e\u800c\u4e0d\u8fdb\u884c\u4fee\u6539\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u975e\u9501\u5b9a\u8bfb\uff08\u4f8b\u5982\uff0c\u5728MySQL\u4e2d\u4f7f\u7528SELECT &#8230; WITH (NOLOCK)\uff09\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>7. 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