{"id":521,"date":"2021-07-28T20:36:50","date_gmt":"2021-07-28T12:36:50","guid":{"rendered":"https:\/\/egonlin.com\/?p=521"},"modified":"2025-06-21T23:34:47","modified_gmt":"2025-06-21T15:34:47","slug":"%e6%95%b0%e6%8d%ae%e5%ba%93%e9%94%81%e6%9c%ba%e5%88%b6","status":"publish","type":"post","link":"https:\/\/egonlin.com\/?p=521","title":{"rendered":"\u6570\u636e\u5e93\u9501\u673a\u5236"},"content":{"rendered":"<h3>\u4e00 \u6570\u636e\u5e93\u7684\u9501\u673a\u5236<\/h3>\n<p><strong>\u4ec0\u4e48\u662f\u9501\uff1f\u4e3a\u4f55\u8981\u52a0\u5165\u9501\u673a\u5236\uff1f<\/strong><\/p>\n<blockquote><p>\u9501\u662f\u8ba1\u7b97\u673a\u534f\u8c03\u591a\u4e2a\u8fdb\u7a0b\u6216\u7ebf\u7a0b\u5e76\u53d1\u8bbf\u95ee\u67d0\u4e00\u8d44\u6e90\u7684\u673a\u5236\uff0c\u90a3\u4e3a\u4f55\u8981\u52a0\u5165\u9501\u673a\u5236\u5462\uff1f<\/p>\n<p>\u56e0\u4e3a\u5728\u6570\u636e\u5e93\u4e2d\uff0c\u9664\u4e86\u4f20\u7edf\u7684\u8ba1\u7b97\u8d44\u6e90\uff08\u5982CPU\u3001RAM\u3001I\/O\u7b49\uff09\u7684\u4e89\u7528\u4ee5\u5916\uff0c\u6570\u636e\u4e5f\u662f\u4e00\u79cd\u4f9b\u9700\u8981\u7528\u6237\u5171\u4eab\u7684\u8d44\u6e90\u3002<\/p>\n<p>\u5f53\u5e76\u53d1\u4e8b\u52a1\u540c\u65f6\u8bbf\u95ee\u4e00\u4e2a\u5171\u4eab\u7684\u8d44\u6e90\u65f6\uff0c\u6709\u53ef\u80fd\u5bfc\u81f4\u6570\u636e\u4e0d\u4e00\u81f4\u3001\u6570\u636e\u65e0\u6548\u7b49\u95ee\u9898\uff0c<\/p>\n<p>\u4f8b\u5982\u6211\u4eec\u5728<a href=\"https:\/\/egonlin.com\/?p=519\" target=\"_blank\" rel=\"noopener\">\u6570\u636e\u5e93\u7684\u8bfb\u73b0\u8c61<\/a>\u4e2d\u4ecb\u7ecd\u8fc7\uff0c\u5728\u5e76\u53d1\u8bbf\u95ee\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u810f\u8bfb\u3001\u4e0d\u53ef\u91cd\u590d\u8bfb\u548c\u5e7b\u8bfb\u7b49\u8bfb\u73b0\u8c61<\/p>\n<p>\u4e3a\u4e86\u5e94\u5bf9\u8fd9\u4e9b\u95ee\u9898\uff0c\u4e3b\u6d41\u6570\u636e\u5e93\u90fd\u63d0\u4f9b\u4e86\u9501\u673a\u5236\uff0c\u4ee5\u53ca\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u7684\u6982\u5ff5\uff0c<\/p>\n<p>\u800c\u9501\u673a\u5236\u53ef\u4ee5\u5c06\u5e76\u53d1\u7684\u6570\u636e\u8bbf\u95ee\u987a\u5e8f\u5316\uff0c\u4ee5\u4fdd\u8bc1\u6570\u636e\u5e93\u4e2d\u6570\u636e\u7684\u4e00\u81f4\u6027\u4e0e\u6709\u6548\u6027<\/p>\n<p>\u6b64\u5916\uff0c\u9501\u51b2\u7a81\u4e5f\u662f\u5f71\u54cd\u6570\u636e\u5e93\u5e76\u53d1\u8bbf\u95ee\u6027\u80fd\u7684\u4e00\u4e2a\u91cd\u8981\u56e0\u7d20\uff0c\u9501\u5bf9\u6570\u636e\u5e93\u800c\u8a00\u663e\u5f97\u5c24\u5176\u91cd\u8981\uff0c\u4e5f\u66f4\u52a0\u590d\u6742\u3002<\/p><\/blockquote>\n<p><strong>\u5e76\u53d1\u63a7\u5236<\/strong><\/p>\n<blockquote><p>\u5728\u8ba1\u7b97\u673a\u79d1\u5b66\uff0c\u7279\u522b\u662f\u7a0b\u5e8f\u8bbe\u8ba1\u3001\u64cd\u4f5c\u7cfb\u7edf\u3001\u591a\u5904\u7406\u673a\u548c\u6570\u636e\u5e93\u7b49\u9886\u57df\uff0c\u5e76\u53d1\u63a7\u5236\uff08<code>Concurrency control<\/code>\uff09\u662f\u786e\u4fdd\u53ca\u65f6\u7ea0\u6b63\u7531\u5e76\u53d1\u64cd\u4f5c\u5bfc\u81f4\u7684\u9519\u8bef\u7684\u4e00\u79cd\u673a\u5236\u3002<\/p><\/blockquote>\n<p>\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff08DBMS\uff09\u4e2d\u7684\u5e76\u53d1\u63a7\u5236\u7684\u4efb\u52a1\u662f\u786e\u4fdd\u5728\u591a\u4e2a\u4e8b\u52a1\u540c\u65f6\u5b58\u53d6\u6570\u636e\u5e93\u4e2d\u540c\u4e00\u6570\u636e\u65f6\u4e0d\u7834\u574f\u4e8b\u52a1\u7684\u9694\u79bb\u6027\u548c\u7edf\u4e00\u6027\u4ee5\u53ca\u6570\u636e\u5e93\u7684\u7edf\u4e00\u6027\u3002\u4e0b\u9762\u4e3e\u4f8b\u8bf4\u660e\u5e76\u53d1\u64cd\u4f5c\u5e26\u6765\u7684\u6570\u636e\u4e0d\u4e00\u81f4\u6027\u95ee\u9898\uff1a<\/p>\n<p>\u73b0\u6709\u4e24\u5904\u706b\u8f66\u7968\u552e\u7968\u70b9\uff0c\u540c\u65f6\u8bfb\u53d6\u67d0\u4e00\u8d9f\u5217\u8f66\u8f66\u7968\u6570\u636e\u5e93\u4e2d\u8f66\u7968\u4f59\u989d\u4e3a X\u3002\u4e24\u5904\u552e\u7968\u70b9\u540c\u65f6\u5356\u51fa\u4e00\u5f20\u8f66\u7968\uff0c\u540c\u65f6\u4fee\u6539\u4f59\u989d\u4e3a X -1\u5199\u56de\u6570\u636e\u5e93\uff0c\u8fd9\u6837\u5c31\u9020\u6210\u4e86\u5b9e\u9645\u5356\u51fa\u4e24\u5f20\u706b\u8f66\u7968\u800c\u6570\u636e\u5e93\u4e2d\u7684\u8bb0\u5f55\u5374\u53ea\u5c11\u4e86\u4e00\u5f20\u3002 \u4ea7\u751f\u8fd9\u79cd\u60c5\u51b5\u7684\u539f\u56e0\u662f\u56e0\u4e3a\u4e24\u4e2a\u4e8b\u52a1\u8bfb\u5165\u540c\u4e00\u6570\u636e\u5e76\u540c\u65f6\u4fee\u6539\uff0c\u5176\u4e2d\u4e00\u4e2a\u4e8b\u52a1\u63d0\u4ea4\u7684\u7ed3\u679c\u7834\u574f\u4e86\u53e6\u4e00\u4e2a\u4e8b\u52a1\u63d0\u4ea4\u7684\u7ed3\u679c\uff0c\u5bfc\u81f4\u5176\u6570\u636e\u7684\u4fee\u6539\u88ab\u4e22\u5931\uff0c\u7834\u574f\u4e86\u4e8b\u52a1\u7684\u9694\u79bb\u6027\u3002\u5e76\u53d1\u63a7\u5236\u8981\u89e3\u51b3\u7684\u5c31\u662f\u8fd9\u7c7b\u95ee\u9898\u3002<\/p>\n<p>\u5c01\u9501\u3001\u65f6\u95f4\u6233\u3001\u4e50\u89c2\u5e76\u53d1\u63a7\u5236(\u4e50\u89c2\u9501)\u548c\u60b2\u89c2\u5e76\u53d1\u63a7\u5236\uff08\u60b2\u89c2\u9501\uff09\u662f\u5e76\u53d1\u63a7\u5236\u4e3b\u8981\u91c7\u7528\u7684\u6280\u672f\u624b\u6bb5\u3002<\/p>\n<h3>\u4e8c \u9501\u7684\u5206\u7c7b<\/h3>\n<p><strong>\u9501\u7684\u5206\u7c7b(oracle)<\/strong><\/p>\n<p>\u4e00\u3001\u6309\u9501\u7684\u7c92\u5ea6\u5212\u5206\uff0c\u53ef\u5206\u4e3a<a href=\"https:\/\/www.cnblogs.com\/linhaifeng\/articles\/14386584.html#_label3\" target=\"_blank\" rel=\"noopener\"><code>\u884c\u7ea7\u9501<\/code>\u3001<code>\u8868\u7ea7\u9501<\/code>\u3001<\/a><code>\u9875\u7ea7\u9501\u3002<\/code>\uff08mysql\u652f\u6301\uff09<\/p>\n<p>\u4e8c\u3001\u6309\u9501\u7ea7\u522b\u5212\u5206\uff0c\u53ef\u5206\u4e3a<a href=\"https:\/\/www.cnblogs.com\/linhaifeng\/articles\/14386584.html#_label4\" target=\"_blank\" rel=\"noopener\"><code>\u5171\u4eab\u9501<\/code>\u3001<code>\u6392\u4ed6\u9501<\/code><\/a><\/p>\n<p>\u4e09\u3001\u6309\u4f7f\u7528\u65b9\u5f0f\u5212\u5206\uff0c\u53ef\u5206\u4e3a<code>\u4e50\u89c2\u9501<\/code>\u3001<code>\u60b2\u89c2\u9501<\/code><\/p>\n<p>\u56db\u3001\u6309\u52a0\u9501\u65b9\u5f0f\u5212\u5206\uff0c\u53ef\u5206\u4e3a<code>\u81ea\u52a8\u9501<\/code>\u3001\u663e\u5f0f<code>\u9501<\/code><\/p>\n<p>\u4e94\u3001\u6309\u64cd\u4f5c\u5212\u5206\uff0c\u53ef\u5206\u4e3a<code>DML\u9501<\/code>\u3001<code>DDL\u9501<\/code><\/p>\n<p><em>DML\u9501\uff08data locks\uff0c\u6570\u636e\u9501\uff09\uff0c\u7528\u4e8e\u4fdd\u62a4\u6570\u636e\u7684\u5b8c\u6574\u6027\uff0c\u5176\u4e2d\u5305\u62ec\u884c\u7ea7\u9501(Row Locks (TX\u9501))\u3001\u8868\u7ea7\u9501(table lock(TM\u9501))\u3002<\/em><\/p>\n<p><em>DDL\u9501\uff08dictionary locks\uff0c\u6570\u636e\u5b57\u5178\u9501\uff09\uff0c\u7528\u4e8e\u4fdd\u62a4\u6570\u636e\u5e93\u5bf9\u8c61\u7684\u7ed3\u6784\uff0c\u5982\u8868\u3001\u7d22\u5f15\u7b49\u7684\u7ed3\u6784\u5b9a\u4e49\u3002\u5176\u4e2d\u5305\u6392\u4ed6DDL\u9501\uff08Exclusive DDL lock\uff09\u3001\u5171\u4eabDDL\u9501\uff08Share DDL lock\uff09\u3001\u53ef\u4e2d\u65ad\u89e3\u6790\u9501\uff08Breakable parse locks\uff09<strong>\u00a0<\/strong><\/em><\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/egonlin.com\/wp-content\/uploads\/2021\/07\/1036857-20210220130519501-379925450.png'><img class=\"lazyload lazyload-style-2\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" class=\"alignnone size-full wp-image-11509\" data-original=\"https:\/\/egonlin.com\/wp-content\/uploads\/2021\/07\/1036857-20210220130519501-379925450.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" width=\"2498\" height=\"964\"  sizes=\"(max-width: 2498px) 100vw, 2498px\" \/><\/div><\/p>\n<h3>\u4e09 MySQL\u4e2d\u7684\u884c\u7ea7\u9501,\u8868\u7ea7\u9501,\u9875\u7ea7\u9501\uff08\u7c92\u5ea6\uff09<\/h3>\n<p>\u5728DBMS\u4e2d\uff0c\u53ef\u4ee5\u6309\u7167\u9501\u7684\u7c92\u5ea6\u628a\u6570\u636e\u5e93\u9501\u5206\u4e3a\u884c\u7ea7\u9501(INNODB\u5f15\u64ce)\u3001\u8868\u7ea7\u9501(MYISAM\u5f15\u64ce)\u548c\u9875\u7ea7\u9501(BDB\u5f15\u64ce )\u3002<\/p>\n<p><strong>\u884c\u7ea7\u9501<\/strong><\/p>\n<p>\u884c\u7ea7\u9501\u662fMysql\u4e2d\u9501\u5b9a\u7c92\u5ea6\u6700\u7ec6\u7684\u4e00\u79cd\u9501\uff0c\u8868\u793a\u53ea\u9488\u5bf9\u5f53\u524d\u64cd\u4f5c\u7684\u884c\u8fdb\u884c\u52a0\u9501\u3002\u884c\u7ea7\u9501\u80fd\u5927\u5927\u51cf\u5c11\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u51b2\u7a81\u3002\u5176\u52a0\u9501\u7c92\u5ea6\u6700\u5c0f\uff0c\u4f46\u52a0\u9501\u7684\u5f00\u9500\u4e5f\u6700\u5927\u3002\u884c\u7ea7\u9501\u5206\u4e3a<code>\u5171\u4eab\u9501<\/code>\u00a0\u548c\u00a0<code>\u6392\u4ed6\u9501<\/code>\u3002<\/p>\n<ul>\n<li>\u7279\u70b9\uff1a\u5f00\u9500\u5927\uff0c\u52a0\u9501\u6162\uff1b\u4f1a\u51fa\u73b0\u6b7b\u9501\uff1b\u9501\u5b9a\u7c92\u5ea6\u6700\u5c0f\uff0c\u53d1\u751f\u9501\u51b2\u7a81\u7684\u6982\u7387\u6700\u4f4e\uff0c<strong>\u5e76\u53d1\u5ea6\u4e5f\u6700\u9ad8<\/strong>\u3002<\/li>\n<li>\u652f\u6301\u5f15\u64ce\uff1aInnoDB<\/li>\n<li>\u884c\u7ea7\u9501\u5b9a\u5206\u4e3a\u884c\u5171\u4eab\u8bfb\u9501\uff08\u5171\u4eab\u9501\uff09\u4e0e\u884c\u72ec\u5360\u5199\u9501\uff08\u6392\u4ed6\u9501\uff09 \uff0c\u5982\u4e0b\u6240\u793a\uff0c\u7528\u6cd5\u8be6\u89c1\u4e0b\u4e00\u5c0f\u8282<\/li>\n<\/ul>\n<div class=\"cnblogs_code\">\n<pre>\u5171\u4eab\u9501\uff08S\uff09\uff1aSELECT * FROM table_name WHERE ... LOCK IN SHARE MODE\r\n\u6392\u4ed6\u9501\uff08X)\uff1aSELECT * FROM table_name WHERE ... FOR UPDATE<\/pre>\n<\/div>\n<p>&nbsp;<\/p>\n<hr \/>\n<p><strong>\u8868\u7ea7\u9501\uff08\u504f\u5411\u4e8e\u8bfb\uff09<\/strong><br \/>\n<\/p><div id=\"rml_readmorelogin_placeholder\" style=\"position:relative;\"><div id=\"rml_fade_content\" style=\"position: absolute;\r\ntop:-10em;\r\nwidth:100%;\r\nheight:10em;\r\nbackground: -webkit-linear-gradient(rgba(255, 255, 255, 0) 0%,#ffffff 100%);\r\nbackground-image: -moz-linear-gradient(rgba(255, 255, 255, 0) 0%,#ffffff 100%);\r\nbackground-image: -o-linear-gradient(rgba(255, 255, 255, 0) 0%,#ffffff 100%);\r\nbackground-image: linear-gradient(rgba(255, 255, 255, 0) 0%,#ffffff 100%);\r\nbackground-image: -ms-linear-gradient(rgba(255, 255, 255, 0) 0%,#ffffff 100%);\"><\/div><div class=\"wpf-controller aru_rml_from_in_post\" style=\"background-color:#eeeeee;border:5px solid #cce6ff;\" id=\"ARU_ReadMoreLogin_ReadMoreLoginController\"><h2 id=\"Header\">\u67e5\u770b\u66f4\u591a<\/h2><div id=\"Message\"><p>\u8054\u7cfb\u7ba1\u7406\u5458\u5fae\u4fe1tutu19192010\uff0c\u6ce8\u518c\u8d26\u53f7<\/p>\n<\/div><div id=\"StatusBarHeader\"><\/div><form id=\"ARU_ReadMoreLogin_ReadMoreLoginController\"><input name=\"post_id\" value=\"521\" type=\"hidden\"\/><input name=\"_init_callback\" value=\"InitLogin\" type=\"hidden\"\/><input name=\"post_id\" value=\"521\" type=\"hidden\"\/><input name=\"rt_ype\" value=\"1\" type=\"hidden\"\/><input name=\"nonce\" value=\"dcef3ed7bc\" type=\"hidden\"\/><input name=\"_wpnonce\" value=\"2d1dcda414\" type=\"hidden\"\/><input name=\"_controller\" value=\"ARU_ReadMoreLogin\\ReadMoreLoginController\" type=\"hidden\"\/><input name=\"_proxy_controller\" value=\"ARU_ReadMoreLogin\\ReadMoreLoginController\" type=\"hidden\"\/><input name=\"_view\" value=\"ARU_ReadMoreLogin\\ReadMoreLoginView\" type=\"hidden\"\/><table class=\"wpf-table-placeholder\"><tbody class=\"wpf-table-placeholder\"><tr class=\"wpf-table-placeholder\"><td class=\"wpf-table-placeholder-input\" width=\"400px\"><table class=\"wpf-table-placeholder\"><tbody class=\"wpf-table-placeholder\"><tr class=\"wpf-table-placeholder\"><th class=\"wpf-table-placeholder-input\"><label class=\"wpf-label\">Username:<\/label><\/th><\/tr><tr class=\"wpf-table-placeholder\"><td class=\"wpf-table-placeholder-input\"><input class=\"regular-text text_input\" name=\"username\" value=\"\" type=\"text\"\/><\/td><\/tr><tr class=\"wpf-table-placeholder\"><th class=\"wpf-table-placeholder-input\"><label class=\"wpf-label\">Password:<\/label><\/th><\/tr><tr class=\"wpf-table-placeholder\"><td class=\"wpf-table-placeholder-input\"><input class=\"regular-text text_input\" name=\"password\" value=\"\" type=\"password\"\/><\/td><\/tr><\/tbody><\/table><p class=\"wpf-table-placeholder submit\"><button class=\"wp_plugin_framework_ajax_button\" type=\"button\" style=\"background-color:#4D90FE;;color:#ffffff;;border:1px solid #3079ed;\" name=\"_event\" value=\"ButtonLogin\">Log in<\/button><\/p><\/td><td class=\"wpf-table-placeholder-input\"><\/td><\/tr><\/tbody><\/table><\/form><div id=\"ButtonStartRegister\"><a href=\"https:\/\/egonlin.com\/wp-login.php?action=register\">Register<\/a><\/div><div id=\"Link1\"><a href=\"https:\/\/egonlin.com\/wp-login.php?action=lostpassword\">Forgotten username or password?<\/a><\/div><div id=\"StatusBarFooter\"><\/div><\/div><\/div><div id=aru_remaining_content><\/div>","protected":false},"excerpt":{"rendered":"<p>\u4e00 \u6570\u636e\u5e93\u7684\u9501\u673a\u5236 \u4ec0\u4e48\u662f\u9501\uff1f\u4e3a\u4f55\u8981\u52a0\u5165\u9501\u673a\u5236\uff1f \u9501\u662f\u8ba1\u7b97\u673a\u534f\u8c03\u591a\u4e2a\u8fdb\u7a0b\u6216\u7ebf\u7a0b\u5e76\u53d1\u8bbf\u95ee\u67d0\u4e00\u8d44\u6e90\u7684\u673a\u5236\uff0c\u90a3\u4e3a\u4f55\u8981 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