{"id":6511,"date":"2024-08-29T20:27:02","date_gmt":"2024-08-29T12:27:02","guid":{"rendered":"https:\/\/t.n-years.com\/?p=6511"},"modified":"2024-08-29T20:27:02","modified_gmt":"2024-08-29T12:27:02","slug":"mysql-%e6%95%b0%e6%8d%ae%e5%ba%93%e4%b8%ad%e9%94%81%e7%9a%84%e4%bb%8b%e7%bb%8d","status":"publish","type":"post","link":"https:\/\/t.n-years.com\/?p=6511","title":{"rendered":"MySQL \u6570\u636e\u5e93\u4e2d\u9501\u7684\u4ecb\u7ecd"},"content":{"rendered":"<blockquote>\n<p>\u975e\u539f\u521b\u3001ChatGPT \u95ee\u7b54\u751f\u6210<\/p>\n<\/blockquote>\n<p>MySQL \u6570\u636e\u5e93\u9501\u673a\u5236\u5728\u5e76\u53d1\u73af\u5883\u4e2d\u8d77\u7740\u5173\u952e\u4f5c\u7528\uff0c\u5b83\u4eec\u7528\u4e8e\u786e\u4fdd\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u5728 MySQL \u4e2d\uff0c\u9501\u4e3b\u8981\u5206\u4e3a\u4ee5\u4e0b\u51e0\u79cd\u7c7b\u578b\uff1a<\/p>\n<h3>1. <strong>\u5168\u5c40\u9501\uff08Global Lock\uff09<\/strong><\/h3>\n<ul>\n<li><strong>\u5b9a\u4e49<\/strong>: \u5168\u5c40\u9501\u662f\u5bf9\u6574\u4e2a\u6570\u636e\u5e93\u5b9e\u4f8b\u52a0\u9501\u3002<\/li>\n<li><strong>\u4f7f\u7528\u573a\u666f<\/strong>: \u4e3b\u8981\u7528\u4e8e\u5168\u5e93\u5907\u4efd\uff08\u903b\u8f91\u5907\u4efd\uff09\uff0c\u5982\u4f7f\u7528 <code>FLUSH TABLES WITH READ LOCK<\/code> (FTWRL) \u547d\u4ee4\u3002<\/li>\n<li><strong>\u5f71\u54cd<\/strong>: \u52a0\u9501\u671f\u95f4\uff0c\u6240\u6709\u6d89\u53ca\u6570\u636e\u5e93\u5199\u64cd\u4f5c\u7684\u8bf7\u6c42\u5c06\u88ab\u963b\u585e\uff0c\u4ec5\u5141\u8bb8\u8bfb\u64cd\u4f5c\u3002\u4f7f\u7528\u4e0d\u5f53\u4f1a\u5bfc\u81f4\u957f\u65f6\u95f4\u7684\u6570\u636e\u5e93\u4e0d\u53ef\u7528\u3002<\/li>\n<\/ul>\n<h3>2. <strong>\u8868\u7ea7\u9501\uff08Table Lock\uff09<\/strong><\/h3>\n<ul>\n<li><strong>\u5b9a\u4e49<\/strong>: \u8868\u7ea7\u9501\u662f\u5728\u8868\u7ea7\u522b\u52a0\u7684\u9501\uff0cMySQL \u652f\u6301\u4e0d\u540c\u7c7b\u578b\u7684\u8868\u9501\u3002<\/li>\n<li><strong>\u7c7b\u578b<\/strong>:\n<ul>\n<li><strong>\u8bfb\u9501\uff08Read Lock\uff09<\/strong>:\n<ul>\n<li>\u901a\u8fc7 <code>LOCK TABLES ... READ<\/code> \u8bed\u53e5\u52a0\u9501\u3002\u591a\u4e2a\u8bfb\u9501\u4e4b\u95f4\u4e0d\u4e92\u65a5\uff0c\u53ef\u4ee5\u5e76\u53d1\u8bfb\u53d6\u8868\u6570\u636e\uff0c\u4f46\u963b\u585e\u5199\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u5199\u9501\uff08Write Lock\uff09<\/strong>:\n<ul>\n<li>\u901a\u8fc7 <code>LOCK TABLES ... WRITE<\/code> \u8bed\u53e5\u52a0\u9501\u3002\u5199\u9501\u4f1a\u963b\u585e\u5176\u4ed6\u8bfb\u548c\u5199\u64cd\u4f5c\uff0c\u786e\u4fdd\u5199\u64cd\u4f5c\u7684\u72ec\u5360\u6027\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u4f7f\u7528\u573a\u666f<\/strong>: \u901a\u5e38\u7528\u4e8e\u8f83\u77ed\u7684\u3001\u7b80\u5355\u7684\u64cd\u4f5c\uff0c\u6bd4\u5982\u7ef4\u62a4\u6216\u6570\u636e\u8fc1\u79fb\u3002<\/li>\n<\/ul>\n<h3>3. <strong>\u884c\u7ea7\u9501\uff08Row Lock\uff09<\/strong><\/h3>\n<ul>\n<li><strong>\u5b9a\u4e49<\/strong>: \u884c\u7ea7\u9501\u662f\u5728\u884c\u7ea7\u522b\u52a0\u7684\u9501\uff0c\u4e3b\u8981\u7528\u4e8e MySQL \u7684 InnoDB \u5b58\u50a8\u5f15\u64ce\u3002<\/li>\n<li><strong>\u7c7b\u578b<\/strong>:\n<ul>\n<li><strong>\u5171\u4eab\u9501\uff08Shared Lock \u6216 S \u9501\uff09<\/strong>:\n<ul>\n<li>\u7528\u4e8e\u8bfb\u64cd\u4f5c\uff0c\u5141\u8bb8\u591a\u4e2a\u4e8b\u52a1\u5e76\u53d1\u8bfb\u53d6\u540c\u4e00\u884c\uff0c\u4f46\u4f1a\u963b\u585e\u5199\u64cd\u4f5c\u3002<\/li>\n<li>\u901a\u8fc7 <code>SELECT ... LOCK IN SHARE MODE<\/code> \u663e\u5f0f\u83b7\u53d6\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u6392\u4ed6\u9501\uff08Exclusive Lock \u6216 X \u9501\uff09<\/strong>:\n<ul>\n<li>\u7528\u4e8e\u5199\u64cd\u4f5c\uff0c\u4fdd\u8bc1\u4e86\u5199\u64cd\u4f5c\u7684\u72ec\u5360\u6027\uff0c\u4f1a\u963b\u585e\u5176\u4ed6\u7684\u8bfb\u548c\u5199\u64cd\u4f5c\u3002<\/li>\n<li>\u901a\u5e38\u7531 <code>INSERT<\/code>, <code>UPDATE<\/code>, <code>DELETE<\/code> \u7b49\u64cd\u4f5c\u81ea\u52a8\u83b7\u53d6\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u4f7f\u7528\u573a\u666f<\/strong>: \u884c\u7ea7\u9501\u6709\u52a9\u4e8e\u63d0\u9ad8\u5e76\u53d1\u6027\uff0c\u9002\u7528\u4e8e\u9ad8\u5e76\u53d1\u7684\u5199\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<h3>4. <strong>\u610f\u5411\u9501\uff08Intention Lock\uff09<\/strong><\/h3>\n<ul>\n<li><strong>\u5b9a\u4e49<\/strong>: \u610f\u5411\u9501\u662f InnoDB \u5b58\u50a8\u5f15\u64ce\u7684\u4e00\u79cd\u8868\u7ea7\u9501\uff0c\u7528\u4e8e\u8868\u660e\u67d0\u4e2a\u4e8b\u52a1\u6b63\u5728\u67d0\u4e9b\u884c\u4e0a\u6253\u7b97\u52a0\u884c\u7ea7\u9501\u3002<\/li>\n<li><strong>\u7c7b\u578b<\/strong>:\n<ul>\n<li><strong>\u610f\u5411\u5171\u4eab\u9501\uff08Intention Shared Lock, IS \u9501\uff09<\/strong>: \u4e8b\u52a1\u6253\u7b97\u5728\u8868\u7684\u67d0\u4e9b\u884c\u4e0a\u52a0\u5171\u4eab\u9501\u3002<\/li>\n<li><strong>\u610f\u5411\u6392\u4ed6\u9501\uff08Intention Exclusive Lock, IX \u9501\uff09<\/strong>: \u4e8b\u52a1\u6253\u7b97\u5728\u8868\u7684\u67d0\u4e9b\u884c\u4e0a\u52a0\u6392\u4ed6\u9501\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u4f7f\u7528\u573a\u666f<\/strong>: \u610f\u5411\u9501\u901a\u8fc7\u8868\u7ea7\u9501\u548c\u884c\u7ea7\u9501\u7684\u534f\u4f5c\uff0c\u63d0\u5347\u9501\u7ba1\u7406\u7684\u6548\u7387\u3002\u5b83\u4e0d\u963b\u585e\u5176\u4ed6\u7684\u610f\u5411\u9501\uff0c\u800c\u662f\u963b\u585e\u5728\u540c\u4e00\u8868\u4e0a\u52a0\u7684\u8868\u7ea7\u9501\u3002<\/li>\n<\/ul>\n<h3>5. <strong>\u95f4\u9699\u9501\uff08Gap Lock\uff09<\/strong><\/h3>\n<ul>\n<li><strong>\u5b9a\u4e49<\/strong>: \u95f4\u9699\u9501\u662f InnoDB \u7684\u4e00\u79cd\u884c\u7ea7\u9501\uff0c\u7528\u4e8e\u9501\u5b9a\u7d22\u5f15\u8bb0\u5f55\u4e4b\u95f4\u7684\u201c\u95f4\u9699\u201d\u3002<\/li>\n<li><strong>\u4f7f\u7528\u573a\u666f<\/strong>: \u5728\u8303\u56f4\u626b\u63cf\uff08<code>SELECT ... WHERE<\/code>\uff09\u6216\u552f\u4e00\u7d22\u5f15\u626b\u63cf\u672a\u547d\u4e2d\u65f6\u4f7f\u7528\uff0c\u76ee\u7684\u662f\u9632\u6b62\u5176\u4ed6\u4e8b\u52a1\u5728\u626b\u63cf\u8303\u56f4\u5185\u63d2\u5165\u65b0\u8bb0\u5f55\u3002<\/li>\n<li><strong>\u5178\u578b\u573a\u666f<\/strong>:\n<ul>\n<li><code>SELECT ... FOR UPDATE<\/code> \u6216 <code>SELECT ... LOCK IN SHARE MODE<\/code> \u8bed\u53e5\u5728\u8303\u56f4\u67e5\u8be2\u65f6\u53ef\u80fd\u4f1a\u4ea7\u751f\u95f4\u9699\u9501\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u6ce8\u610f<\/strong>: \u95f4\u9699\u9501\u7684\u4f7f\u7528\u53ef\u80fd\u5bfc\u81f4\u9501\u7b49\u5f85\u548c\u6b7b\u9501\u7684\u589e\u52a0\u3002<\/li>\n<\/ul>\n<h3>6. <strong>\u4e34\u952e\u9501\uff08Next-Key Lock\uff09<\/strong><\/h3>\n<ul>\n<li><strong>\u5b9a\u4e49<\/strong>: \u4e34\u952e\u9501\u662f InnoDB \u4e2d\u5c06\u884c\u9501\u548c\u95f4\u9699\u9501\u7ed3\u5408\u7684\u4e00\u79cd\u9501\u3002\u5b83\u9501\u5b9a\u7d22\u5f15\u8bb0\u5f55\u53ca\u5176\u524d\u540e\u7684\u201c\u95f4\u9699\u201d\u3002<\/li>\n<li><strong>\u4f7f\u7528\u573a\u666f<\/strong>: \u7528\u4e8e\u907f\u514d\u5e7b\u8bfb\u73b0\u8c61\uff0c\u786e\u4fdd\u5728\u8303\u56f4\u67e5\u8be2\u65f6\uff0c\u5176\u4ed6\u4e8b\u52a1\u4e0d\u80fd\u63d2\u5165\u6216\u4fee\u6539\u9501\u5b9a\u7684\u8303\u56f4\u5185\u7684\u8bb0\u5f55\u3002<\/li>\n<li><strong>\u5178\u578b\u573a\u666f<\/strong>: \u5728\u9ad8\u5e76\u53d1\u7684\u573a\u666f\u4e0b\u786e\u4fdd\u6570\u636e\u4e00\u81f4\u6027\uff0c\u907f\u514d\u5e7b\u8bfb\u95ee\u9898\u3002<\/li>\n<\/ul>\n<h3>7. <strong>\u81ea\u589e\u957f\u9501\uff08AUTO-INC Lock\uff09<\/strong><\/h3>\n<ul>\n<li><strong>\u5b9a\u4e49<\/strong>: \u81ea\u589e\u957f\u9501\u662f\u4e13\u95e8\u7528\u4e8e\u81ea\u589e\u5b57\u6bb5\uff08<code>AUTO_INCREMENT<\/code>\uff09\u7684\u9501\uff0c\u786e\u4fdd\u81ea\u589e\u503c\u7684\u552f\u4e00\u6027\u3002<\/li>\n<li><strong>\u4f7f\u7528\u573a\u666f<\/strong>: \u5728\u63d2\u5165\u65b0\u8bb0\u5f55\u65f6\uff0c\u786e\u4fdd\u6bcf\u4e2a\u63d2\u5165\u64cd\u4f5c\u83b7\u5f97\u552f\u4e00\u7684\u81ea\u589e\u503c\u3002<\/li>\n<li><strong>\u6ce8\u610f<\/strong>: InnoDB \u5728\u6bcf\u4e2a\u4e8b\u52a1\u63d0\u4ea4\u65f6\u91ca\u653e\u81ea\u589e\u957f\u9501\uff0c\u56e0\u6b64\u81ea\u589e\u957f\u9501\u4e0d\u4f1a\u50cf\u5176\u4ed6\u884c\u7ea7\u9501\u4e00\u6837\u5f15\u53d1\u5927\u8303\u56f4\u7684\u9501\u7b49\u5f85\u95ee\u9898\u3002<\/li>\n<\/ul>\n<h3>8. <strong>\u6b7b\u9501\u68c0\u6d4b\u548c\u8d85\u65f6<\/strong><\/h3>\n<ul>\n<li><strong>\u6b7b\u9501\u68c0\u6d4b<\/strong>: InnoDB \u652f\u6301\u81ea\u52a8\u68c0\u6d4b\u6b7b\u9501\u5e76\u56de\u6eda\u9020\u6210\u6b7b\u9501\u7684\u4e8b\u52a1\uff0c\u4ee5\u91ca\u653e\u9501\u3002<\/li>\n<li><strong>\u9501\u7b49\u5f85\u8d85\u65f6<\/strong>: \u901a\u8fc7\u8bbe\u7f6e\u53c2\u6570 <code>innodb_lock_wait_timeout<\/code>\uff0c\u53ef\u4ee5\u63a7\u5236\u4e8b\u52a1\u7b49\u5f85\u9501\u7684\u6700\u957f\u65f6\u95f4\uff0c\u907f\u514d\u957f\u65f6\u95f4\u7684\u9501\u7b49\u5f85\u3002<\/li>\n<\/ul>\n<h3>\u5c0f\u7ed3<\/h3>\n<p>\u4e0d\u540c\u7c7b\u578b\u7684\u9501\u7528\u4e8e\u4e0d\u540c\u7684\u573a\u666f\uff0c\u4f18\u5316\u5e76\u53d1\u6027\u80fd\u548c\u786e\u4fdd\u6570\u636e\u4e00\u81f4\u6027\u662f\u5173\u952e\u3002\u540e\u7aef\u5de5\u7a0b\u5e08\u5728\u8bbe\u8ba1\u548c\u4f18\u5316\u6570\u636e\u5e93\u65f6\uff0c\u5e94\u6839\u636e\u5177\u4f53\u7684\u5e94\u7528\u573a\u666f\u9009\u62e9\u5408\u9002\u7684\u9501\u7c7b\u578b\uff0c\u5e76\u7406\u89e3\u9501\u673a\u5236\u53ef\u80fd\u5e26\u6765\u7684\u5e76\u53d1\u95ee\u9898\uff0c\u5982\u9501\u7b49\u5f85\u548c\u6b7b\u9501\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u975e\u539f\u521b\u3001ChatGPT \u95ee\u7b54\u751f\u6210 MySQL \u6570\u636e\u5e93\u9501\u673a\u5236\u5728\u5e76\u53d1\u73af\u5883\u4e2d\u8d77\u7740\u5173\u952e\u4f5c\u7528\uff0c\u5b83\u4eec\u7528\u4e8e\u786e\u4fdd\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c&#8230; <\/p>\n<div class=\"read-more navbutton\"><a href=\"https:\/\/t.n-years.com\/?p=6511\">\u9605\u8bfb\u66f4\u591a<i class=\"fa fa-angle-double-right\"><\/i><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[123],"tags":[126,108],"class_list":["post-6511","post","type-post","status-publish","format-standard","hentry","category-123","tag-mysql","tag-108"],"_links":{"self":[{"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/posts\/6511","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/t.n-years.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6511"}],"version-history":[{"count":1,"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/posts\/6511\/revisions"}],"predecessor-version":[{"id":6512,"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/posts\/6511\/revisions\/6512"}],"wp:attachment":[{"href":"https:\/\/t.n-years.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6511"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/t.n-years.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6511"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/t.n-years.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6511"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}