{"id":1727,"date":"2020-06-23T17:08:12","date_gmt":"2020-06-23T09:08:12","guid":{"rendered":"http:\/\/39.97.231.10\/?p=1727"},"modified":"2020-06-23T17:08:12","modified_gmt":"2020-06-23T09:08:12","slug":"mysql%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%9e%b6%e6%9e%84","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=1727","title":{"rendered":"MySQL\u7684\u57fa\u672c\u67b6\u6784"},"content":{"rendered":"<h1>\u4e00\u3001MySQL\u7684\u67b6\u6784\u56fe\uff1a<\/h1>\n<article>\n<div>\n<div>\n<div><\/div>\n<div data-width=\\\"500\\\" data-height=\\\"912\\\"><img src=\\\"https:\/\/upload-images.jianshu.io\/upload_images\/12320828-9c623ad26646a550.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/500\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/12320828-9c623ad26646a550.png\\\" data-original-width=\\\"500\\\" data-original-height=\\\"912\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"50103\\\" data-image-index=\\\"0\\\" \/><\/div>\n<\/div>\n<div>MySQL\u57fa\u672c\u67b6\u6784\u56fe<\/div>\n<\/div>\n<p>\u4ece\u4e0a\u56fe\u53ef\u4ee5\u770b\u51fa\uff1a<\/p>\n<ul>\n<li>Server\u5c42\u5305\u62ec\uff1a\u8fde\u63a5\u5668\uff0c\u67e5\u8be2\u7f13\u5b58\uff0c\u89e3\u6790\u5668\uff0c\u9884\u5904\u7406\u5668\uff0c\u4f18\u5316\u5668\uff0c\u6267\u884c\u5668\u7b49\uff0c\u6240\u6709\u8de8\u5b58\u50a8\u5f15\u64ce\u7684\u529f\u80fd\u90fd\u5728\u8fd9\u4e00\u5c42\u5b9e\u73b0\uff0c\u6bd4\u5982\u5b58\u50a8\u8fc7\u7a0b\uff0c\u89e6\u53d1\u5668\u548c\u89c6\u56fe\u7b49\u3002<\/li>\n<li>\u5b58\u50a8\u5f15\u64ce\u5c42\u5305\u62ec\uff1aInnoDB\u3001MyISAM\u3001MEMORY\u7b49<\/li>\n<li>\u4e0d\u540c\u7684\u5b58\u50a8\u5f15\u64ce\u5171\u7528\u540c\u4e00\u4e2aServer\u5c42<\/li>\n<\/ul>\n<h1>\u4e8c\u3001\u7ec4\u4ef6\u4ecb\u7ecd<\/h1>\n<p>1. \u8fde\u63a5\u5668<\/p>\n<ul>\n<li>\u8d1f\u8d23\u8ddf\u5ba2\u6237\u7aef\u5efa\u7acb\u8fde\u63a5\uff0c\u83b7\u53d6\u6743\u9650\uff0c\u7ef4\u6301\u548c\u7ba1\u7406\u8fde\u63a5<\/li>\n<li>\u7528\u6237\u540d\u5bc6\u7801\u9a8c\u8bc1\u901a\u8fc7\u540e\uff0c\u8fde\u63a5\u5668\u4f1a\u5230\u6743\u9650\u8868\u4e2d\u67e5\u8be2\u7528\u6237\u7684\u6743\u9650\uff0c\u4e4b\u540e\u8fd9\u4e2a\u94fe\u63a5\u91cc\u9762\u7684\u6743\u9650\u5224\u65ad\u903b\u8f91\uff0c\u90fd\u4f9d\u8d56\u4e8e\u6b64\u65f6\u8bfb\u53d6\u7684\u6743\u9650\uff1b\u5373\u4f7f\u4f7f\u7528\u7ba1\u7406\u5458\u8d26\u53f7\u5bf9\u7528\u6237\u6743\u9650\u4f5c\u4fee\u6539\uff0c\u4e5f\u4e0d\u4f1a\u5f71\u54cd\u5df2\u5b58\u5728\u7684\u8fde\u63a5\u7684\u6743\u9650<\/li>\n<li>\u53c2\u6570wait_timeout\u63a7\u5236\u670d\u52a1\u5668\u4fdd\u6301\u4e0e\u5ba2\u6237\u7aef\u7684\u7a7a\u95f2\u8fde\u63a5\u7684\u65f6\u957f\uff0c\u9ed8\u8ba4\u503c\u4e3a8\u5c0f\u65f6<\/li>\n<li>\u957f\u8fde\u63a5\u79ef\u7d2f\u5bfc\u81f4MySQL\u5360\u7528\u5185\u5b58\u98de\u6da8<br \/>\n\u8003\u8651\u5b9a\u671f\u65ad\u5f00\u957f\u8fde\u63a5<br \/>\nMySQL5.7\u4ee5\u540e\uff0c\u6267\u884cmysql_reset_connection\u6765\u91cd\u65b0\u521d\u59cb\u5316\u8fde\u63a5\u8d44\u6e90 (\u6b64\u8fc7\u7a0b\u4e0d\u9700\u8981\u91cd\u8fde\u548c\u91cd\u73b0\u9a8c\u8bc1\u6743\u9650\uff0c\u4f46\u662f\u4f1a\u5c06\u8fde\u63a5\u6062\u590d\u5230\u521a\u521b\u5efa\u5b8c\u6210\u7684\u72b6\u6001)<\/li>\n<\/ul>\n<p>2. \u67e5\u8be2\u7f13\u5b58<\/p>\n<ul>\n<li>\u5982\u679c\u67e5\u8be2\u6070\u597d\u547d\u4e2d\u67e5\u8be2\u7f13\u5b58\uff0c\u90a3\u4e48\u67e5\u8be2\u4e0d\u4f1a\u88ab\u89e3\u6790\uff0c\u6267\u884c\u8ba1\u5212\u4e0d\u4f1a\u88ab\u751f\u6210\uff0c\u5728\u8fd4\u56de\u67e5\u8be2\u7ed3\u679c\u4e4b\u524d\uff0cMySQL\u4f1a\u68c0\u67e5\u7528\u6237\u7684\u6743\u9650<\/li>\n<li>\u5bf9\u4e00\u5f20\u8868\u7684\u66f4\u65b0\uff0c\u4f1a\u5bfc\u81f4\u8fd9\u5f20\u8868\u7684\u67e5\u8be2\u7f13\u5b58\u88ab\u6e05\u7a7a(\u67e5\u8be2\u7f13\u5b58\u5931\u6548\u9891\u7e41\uff0c\u5f0a\u5927\u4e8e\u5229)<\/li>\n<li>\u63a8\u8350\u6309\u9700\u4f7f\u7528\u67e5\u8be2\u7f13\u5b58\uff0c\u8bbe\u7f6e\u53c2\u6570query_cache_type\u8bbe\u7f6e\u6210DEMAND\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cSQL\u4e0d\u4f7f\u7528\u67e5\u8be2\u7f13\u5b58\uff0c\u901a\u8fc7SQL_CACHE\u663e\u793a\u6307\u5b9a\u4f7f\u7528\u67e5\u8be2\u7f13\u5b58\uff0c\u5982\u4e0bSQL\uff1a<\/li>\n<\/ul>\n<div>\n<pre>SELECT SQL_CACHE * FROM user_info WHERE id = 1;\n<\/pre>\n<\/div>\n<ul>\n<li>MySQL 8.0\u5df2\u7ecf\u5c06\u67e5\u8be2\u7f13\u5b58\u6574\u5757\u529f\u80fd\u5220\u9664\u6389<\/li>\n<\/ul>\n<p>3. \u89e3\u6790\u5668<\/p>\n<ul>\n<li>\u8bcd\u6cd5\u5206\u6790\uff0c\u8bc6\u522bSQL\u4e2d\u7684\u5b57\u7b26\u4e32\u662f\u4ec0\u4e48<\/li>\n<li>\u8bed\u6cd5\u5206\u6790<br \/>\na.\u5728\u8bcd\u6cd5\u5206\u6790\u7684\u57fa\u7840\u4e0a\uff0c\u6839\u636e\u8bed\u6cd5\u89c4\u5219\uff0c\u5224\u65adSQL\u662f\u5426\u6ee1\u8db3MySQL\u8bed\u6cd5\uff0c\u6700\u540e\u5f97\u5230\u4e00\u68f5\u8bed\u6cd5\u6811<br \/>\nb.\u5bf9\u4e8e\u53ea\u662f\u53c2\u6570\u4e0d\u540c\uff0c\u5176\u4ed6\u5747\u76f8\u540c\u7684sql\uff0c\u5b83\u4eec\u6267\u884c\u65f6\u95f4\u4e0d\u540c\u4f46\u786c\u89e3\u6790\u7684\u65f6\u95f4\u662f\u76f8\u540c\u7684\uff1b\u800c\u540c\u4e00SQL\u968f\u7740\u67e5\u8be2\u6570\u636e\u7684\u53d8\u5316\uff0c\u591a\u6b21\u67e5\u8be2\u6267\u884c\u65f6\u95f4\u53ef\u80fd\u4e0d\u540c\uff0c\u4f46\u786c\u89e3\u6790\u7684\u65f6\u95f4\u662f\u4e0d\u53d8\u7684<\/li>\n<\/ul>\n<p>4. \u9884\u5904\u7406\u5668<\/p>\n<ul>\n<li>\u6839\u636eMySQL\u89c4\u5219\uff0c\u8fdb\u4e00\u6b65\u68c0\u67e5\u8bed\u6cd5\u6811\u662f\u5426\u5408\u6cd5\uff0c\u6bd4\u5982\u68c0\u67e5\u8868\u3001\u6570\u636e\u5217\u662f\u5426\u5b58\u5728\uff1b\u522b\u540d\u662f\u5426\u6709\u6b67\u4e49\u7b49\u7b49<\/li>\n<\/ul>\n<p>5. \u4f18\u5316\u5668<\/p>\n<ul>\n<li>\u4f18\u5316\u5668\u4f1a\u5c06\u8bed\u6cd5\u6811\u8f6c\u5316\u6210\u6267\u884c\u8ba1\u5212\uff08\u53ef\u4ee5\u751f\u6210\u591a\u4e2a\u6267\u884c\u8ba1\u5212\uff09\uff0c\u7136\u540e\u627e\u51fa\u6700\u5408\u9002\u7684\u6267\u884c\u8ba1\u5212\uff08\u6210\u672c\u6700\u5c11\uff09<\/li>\n<li>\u53ef\u4ee5\u901a\u8fc7Last_query_cost\u5f97\u77e5\u67e5\u8be2\u7684\u6210\u672c<br \/>\n\u5982\u4e0bSQL\uff1a<\/li>\n<\/ul>\n<div>\n<pre>\/\/ \u5148\u6267\u884c\u67e5\u8be2\u8bed\u53e5\nSELECT * FROM user_info WHERE age &gt; 28;\n\/\/ \u7136\u540e\u6267\u884c\u6210\u672c\u67e5\u770b\u8bed\u53e5\nshow status like \\'Last_query_cost\\';   \/\/ \u7ed3\u679c\u4e2d\u7684value\u8868\u793a\uff0c\u4f18\u5316\u5668\u8ba4\u4e3a\u8fd9\u6761SQL\u5927\u6982\u9700\u8981\u67e5\u591a\u5c11\u4e2a\u6570\u636e\u9875\u7684\u968f\u673a\u67e5\u627e\u624d\u80fd\u5b8c\u6210\u67e5\u8be2\n<\/pre>\n<\/div>\n<ul>\n<li>\u53ef\u4ee5\u8bf7\u6c42\u4f18\u5316\u5668\u89e3\u6790\u4f18\u5316\u8fc7\u7a0b\u7684\u5404\u4e2a\u56e0\u7d20\uff08explain sql\uff09<\/li>\n<li>\u5728\u8868\u91cc\u9762\u6709\u591a\u4e2a\u7d22\u5f15\u7684\u65f6\u5019\uff0c\u51b3\u5b9a\u4f7f\u7528\u90a3\u4e2a\u7d22\u5f15<\/li>\n<li>\u901a\u8fc7\u7279\u6b8a\u7684\u5173\u952e\u5b57\u63d0\u793a\u4f18\u5316\u5668\uff0c\u53ef\u4ee5\u5f71\u54cd\u4f18\u5316\u5668\u7684\u51b3\u7b56\u8fc7\u7a0b\uff08\u4f8b\u5982\uff1afor index\uff09<\/li>\n<li>\u4f18\u5316\u5668\u9636\u6bb5\u5b8c\u6210\u540e\uff0c\u6267\u884c\u8ba1\u5212\u5c31\u786e\u5b9a\u4e0b\u6765\u4e86<\/li>\n<li>\u4f18\u5316\u5668\u6709\u65f6\u5019\u4f1a\u9009\u62e9\u9519\u8bef\u7684\u6267\u884c\u8ba1\u5212\uff1aa.\u7d22\u5f15\u7edf\u8ba1\u4fe1\u606f\u4e0d\u51c6 b.\u4f18\u5316\u5668\u7406\u89e3\u7684\u6700\u4f18\u6267\u884c\u8ba1\u5212\u4e0d\u4e00\u5b9a\u662f\u54cd\u5e94\u6700\u5feb\u7684\u6267\u884c\u8ba1\u5212<\/li>\n<\/ul>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001MySQL\u7684\u67b6\u6784\u56fe\uff1a MySQL\u57fa\u672c\u67b6\u6784\u56fe \u4ece\u4e0a\u56fe\u53ef\u4ee5\u770b\u51fa\uff1a Server\u5c42\u5305\u62ec\uff1a\u8fde\u63a5\u5668\uff0c\u67e5\u8be2\u7f13\u5b58\uff0c\u89e3\u6790\u5668 &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"http:\/\/www.weijing.co\/?p=1727\"> <span class=\"screen-reader-text\">MySQL\u7684\u57fa\u672c\u67b6\u6784<\/span> \u67e5\u770b\u5168\u6587 &raquo;<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[90,88],"tags":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"mailpoet_newsletter_max":false,"woocommerce_thumbnail":false,"woocommerce_single":false,"woocommerce_gallery_thumbnail":false,"shop_catalog":false,"shop_single":false,"shop_thumbnail":false},"uagb_author_info":{"display_name":"weijing","author_link":"http:\/\/www.weijing.co\/?author=4"},"uagb_comment_info":0,"uagb_excerpt":"\u4e00\u3001MySQL\u7684\u67b6\u6784\u56fe\uff1a MySQL\u57fa\u672c\u67b6\u6784\u56fe \u4ece\u4e0a\u56fe\u53ef\u4ee5\u770b\u51fa\uff1a Server\u5c42\u5305\u62ec\uff1a\u8fde\u63a5\u5668\uff0c\u67e5\u8be2\u7f13\u5b58\uff0c\u89e3\u6790\u5668&hellip;","_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1727"}],"collection":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1727"}],"version-history":[{"count":0,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1727\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1727"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1727"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1727"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}