{"id":155,"date":"2024-08-10T09:22:07","date_gmt":"2024-08-10T01:22:07","guid":{"rendered":"https:\/\/www.dbyh.top\/?p=155"},"modified":"2024-08-10T09:22:07","modified_gmt":"2024-08-10T01:22:07","slug":"mysql%e5%a6%82%e4%bd%95%e4%bc%98%e5%8c%96","status":"publish","type":"post","link":"https:\/\/www.dbyh.top\/index.php\/2024\/08\/10\/mysql%e5%a6%82%e4%bd%95%e4%bc%98%e5%8c%96\/","title":{"rendered":"MYSQL\u5982\u4f55\u4f18\u5316"},"content":{"rendered":"\n<p>MySQL\u7684\u4f18\u5316\u662f\u786e\u4fdd\u6570\u636e\u5e93\u6027\u80fd\u7684\u5173\u952e\u6b65\u9aa4\u3002\u4f18\u5316\u53ef\u4ee5\u4ece\u591a\u4e2a\u65b9\u9762\u5165\u624b\uff0c\u5305\u62ec\u67e5\u8be2\u4f18\u5316\u3001\u6570\u636e\u5e93\u8bbe\u8ba1\u3001\u670d\u52a1\u5668\u914d\u7f6e\u7b49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u4f18\u5316\u5efa\u8bae\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u67e5\u8be2\u4f18\u5316<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4f7f\u7528\u7d22\u5f15<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u4e3a\u9891\u7e41\u67e5\u8be2\u7684\u5b57\u6bb5\u521b\u5efa\u7d22\u5f15\uff0c\u7279\u522b\u662f\u7528\u4e8e <code>WHERE<\/code> \u5b50\u53e5\u3001<code>JOIN<\/code> \u64cd\u4f5c\u548c <code>ORDER BY<\/code> \u5b50\u53e5\u7684\u5b57\u6bb5\u3002<\/li>\n\n\n\n<li>\u9009\u62e9\u5408\u9002\u7684\u7d22\u5f15\u7c7b\u578b\uff08\u5982 B-Tree\u3001Hash \u7b49\uff09\uff0c\u5e76\u907f\u514d\u8fc7\u591a\u7684\u7d22\u5f15\uff0c\u56e0\u4e3a\u8fd9\u4f1a\u5f71\u54cd\u63d2\u5165\u548c\u66f4\u65b0\u64cd\u4f5c\u7684\u6027\u80fd\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u4f18\u5316\u67e5\u8be2\u8bed\u53e5<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u7528 <code>EXPLAIN<\/code> \u547d\u4ee4\u5206\u6790\u67e5\u8be2\u7684\u6267\u884c\u8ba1\u5212\uff0c\u627e\u51fa\u74f6\u9888\u3002<\/li>\n\n\n\n<li>\u907f\u514d\u4f7f\u7528 <code>SELECT *<\/code>\uff0c\u53ea\u9009\u62e9\u9700\u8981\u7684\u5b57\u6bb5\u3002<\/li>\n\n\n\n<li>\u4f7f\u7528\u9002\u5f53\u7684 <code>JOIN<\/code> \u7c7b\u578b\uff08\u5982 <code>INNER JOIN<\/code>\u3001<code>LEFT JOIN<\/code> \u7b49\uff09\uff0c\u5e76\u786e\u4fdd\u8fde\u63a5\u6761\u4ef6\u6709\u7d22\u5f15\u3002<\/li>\n\n\n\n<li>\u907f\u514d\u5728\u67e5\u8be2\u4e2d\u4f7f\u7528 <code>SELECT DISTINCT<\/code>\uff0c\u9664\u975e\u786e\u5b9e\u9700\u8981\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u67e5\u8be2\u7f13\u5b58<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u542f\u7528\u67e5\u8be2\u7f13\u5b58\uff08\u867d\u7136\u5728MySQL 8.0\u4e2d\u5df2\u88ab\u5e9f\u5f03\uff09\u3002\u5728\u8f83\u65e7\u7248\u672c\u4e2d\uff0c\u5408\u7406\u914d\u7f6e\u67e5\u8be2\u7f13\u5b58\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u6570\u636e\u5e93\u8bbe\u8ba1\u4f18\u5316<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8868\u8bbe\u8ba1<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u5408\u7406\u8bbe\u8ba1\u8868\u7ed3\u6784\uff0c\u907f\u514d\u5197\u4f59\u6570\u636e\u3002\u4f7f\u7528\u8303\u5f0f\u5316\u8bbe\u8ba1\u53ef\u4ee5\u51cf\u5c11\u6570\u636e\u91cd\u590d\u3002<\/li>\n\n\n\n<li>\u786e\u4fdd\u5b57\u6bb5\u6570\u636e\u7c7b\u578b\u5408\u7406\uff0c\u907f\u514d\u4f7f\u7528\u8fc7\u5927\u7684\u6570\u636e\u7c7b\u578b\uff08\u4f8b\u5982\uff0c\u4f7f\u7528 <code>INT<\/code> \u800c\u4e0d\u662f <code>BIGINT<\/code>\uff0c\u4f7f\u7528 <code>VARCHAR(255)<\/code> \u53ea\u5728\u5fc5\u8981\u65f6\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5206\u533a\u8868<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u5bf9\u4e8e\u975e\u5e38\u5927\u7684\u8868\uff0c\u8003\u8651\u4f7f\u7528\u5206\u533a\u8868\uff0c\u4ee5\u4fbf\u5206\u6563\u6570\u636e\u5e76\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u6b63\u786e\u5b9a\u4e49\u5916\u952e\u7ea6\u675f<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u5916\u952e\u7ea6\u675f\u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u5b8c\u6574\u6027\uff0c\u4f46\u4e5f\u53ef\u80fd\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u786e\u4fdd\u5916\u952e\u5b57\u6bb5\u6709\u7d22\u5f15\uff0c\u5e76\u53ea\u5728\u5fc5\u8981\u65f6\u4f7f\u7528\u5916\u952e\u7ea6\u675f\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u670d\u52a1\u5668\u914d\u7f6e\u4f18\u5316<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8c03\u6574MySQL\u914d\u7f6e<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u4fee\u6539 <code>my.cnf<\/code> \u6216 <code>my.ini<\/code> \u914d\u7f6e\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\uff0c\u5982 <code>innodb_buffer_pool_size<\/code>\uff08\u8bbe\u7f6eInnoDB\u7f13\u51b2\u6c60\u5927\u5c0f\uff09\u3001<code>query_cache_size<\/code>\uff08\u5bf9\u4e8e\u65e7\u7248\u672cMySQL\uff09\u7b49\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u8fde\u63a5\u6570\u8bbe\u7f6e<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u8c03\u6574 <code>max_connections<\/code> \u53c2\u6570\uff0c\u6839\u636e\u5e94\u7528\u7a0b\u5e8f\u7684\u9700\u6c42\u6765\u914d\u7f6e\u6700\u5927\u8fde\u63a5\u6570\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u4f18\u5316\u78c1\u76d8\u548c\u5185\u5b58\u4f7f\u7528<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u786e\u4fdd\u670d\u52a1\u5668\u6709\u8db3\u591f\u7684\u5185\u5b58\uff0c\u5e76\u6839\u636e\u7cfb\u7edf\u7684\u4f7f\u7528\u60c5\u51b5\u6765\u4f18\u5316\u78c1\u76d8IO\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">4. \u7ef4\u62a4\u4e0e\u76d1\u63a7<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5b9a\u671f\u7ef4\u62a4<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u5b9a\u671f\u8fd0\u884c <code>ANALYZE TABLE<\/code> \u548c <code>OPTIMIZE TABLE<\/code> \u6765\u66f4\u65b0\u8868\u7edf\u8ba1\u4fe1\u606f\u548c\u6574\u7406\u8868\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u76d1\u63a7\u6570\u636e\u5e93\u6027\u80fd<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u7528\u6027\u80fd\u76d1\u63a7\u5de5\u5177\uff08\u5982 MySQL Enterprise Monitor\u3001Percona Monitoring and Management\u3001Prometheus + Grafana \u7b49\uff09\u76d1\u63a7\u6570\u636e\u5e93\u7684\u5065\u5eb7\u72b6\u51b5\u548c\u6027\u80fd\u6307\u6807\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u67e5\u770b\u6162\u67e5\u8be2\u65e5\u5fd7<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u542f\u7528\u6162\u67e5\u8be2\u65e5\u5fd7\uff08<code>slow_query_log<\/code>\uff09\u6765\u8bc6\u522b\u548c\u4f18\u5316\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u67e5\u8be2\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">5. \u6570\u636e\u5907\u4efd\u4e0e\u6062\u590d<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5907\u4efd\u7b56\u7565<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u5b9a\u671f\u5907\u4efd\u6570\u636e\uff0c\u786e\u4fdd\u5728\u6570\u636e\u4e22\u5931\u6216\u635f\u574f\u65f6\u80fd\u591f\u5feb\u901f\u6062\u590d\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u6062\u590d\u6d4b\u8bd5<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u5b9a\u671f\u6d4b\u8bd5\u5907\u4efd\u6062\u590d\u8fc7\u7a0b\uff0c\u786e\u4fdd\u5907\u4efd\u662f\u6709\u6548\u7684\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>MySQL\u7684\u4f18\u5316\u662f\u786e\u4fdd\u6570\u636e\u5e93\u6027\u80fd\u7684\u5173\u952e\u6b65\u9aa4\u3002\u4f18\u5316\u53ef\u4ee5\u4ece\u591a\u4e2a\u65b9\u9762\u5165\u624b\uff0c\u5305\u62ec\u67e5\u8be2\u4f18\u5316\u3001\u6570\u636e\u5e93\u8bbe\u8ba1\u3001\u670d\u52a1\u5668\u914d\u7f6e\u7b49\u3002\u4ee5 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-155","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.dbyh.top\/index.php\/wp-json\/wp\/v2\/posts\/155","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dbyh.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dbyh.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dbyh.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dbyh.top\/index.php\/wp-json\/wp\/v2\/comments?post=155"}],"version-history":[{"count":1,"href":"https:\/\/www.dbyh.top\/index.php\/wp-json\/wp\/v2\/posts\/155\/revisions"}],"predecessor-version":[{"id":156,"href":"https:\/\/www.dbyh.top\/index.php\/wp-json\/wp\/v2\/posts\/155\/revisions\/156"}],"wp:attachment":[{"href":"https:\/\/www.dbyh.top\/index.php\/wp-json\/wp\/v2\/media?parent=155"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dbyh.top\/index.php\/wp-json\/wp\/v2\/categories?post=155"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dbyh.top\/index.php\/wp-json\/wp\/v2\/tags?post=155"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}