{"id":200568,"date":"2025-05-06T09:07:52","date_gmt":"2025-05-06T01:07:52","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200568\/"},"modified":"2025-05-06T09:07:52","modified_gmt":"2025-05-06T01:07:52","slug":"%e5%a6%82%e4%bd%95%e5%87%86%e7%a1%ae%e6%9f%a5%e7%9c%8b-mysql-%e7%b4%a2%e5%bc%95%e7%9a%84%e7%a3%81%e7%9b%98%e7%a9%ba%e9%97%b4%e5%8d%a0%e7%94%a8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200568\/","title":{"rendered":"\u5982\u4f55\u51c6\u786e\u67e5\u770b MySQL \u7d22\u5f15\u7684\u78c1\u76d8\u7a7a\u95f4\u5360\u7528\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u5982\u4f55\u51c6\u786e\u67e5\u770b MySQL \u7d22\u5f15\u7684\u78c1\u76d8\u7a7a\u95f4\u5360\u7528\uff1f<\/h1>\n<p>\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u6211\u4eec\u8981\u52aa\u529b\u5b66\u4e60\u5566\uff01\u4eca\u5929\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4e0b\u6587\u4e2d\u7684\u5185\u5bb9\u6211\u4eec\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5728\u9605\u8bfb\u672c\u6587\u8fc7\u7a0b\u4e2d\u6709\u9047\u5230\u4e0d\u6e05\u695a\u7684\u5730\u65b9\uff0c\u6b22\u8fce\u7559\u8a00\u5440\uff01\u6211\u4eec\u4e00\u8d77\u8ba8\u8bba\uff0c\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241108\/1731062390672dea76aa3df.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u6316\u6398 mysql \u7d22\u5f15\u7684\u78c1\u76d8\u8db3\u8ff9<\/strong><\/p>\n<p>\u5728 mysql \u4e2d\u7ba1\u7406\u7d22\u5f15\u5927\u5c0f\u662f\u6570\u636e\u5e93\u4f18\u5316\u4e2d\u7684\u5173\u952e\u65b9\u9762\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cshow table status; \u547d\u4ee4\u4ec5\u663e\u793a\u6240\u6709\u7d22\u5f15\u7684\u7d2f\u79ef\u5927\u5c0f\u3002\u4f46\u662f\uff0c\u5982\u679c\u60a8\u9700\u8981\u51c6\u786e\u4e86\u89e3\u6bcf\u4e2a\u7d22\u5f15\u7684\u78c1\u76d8\u6d88\u8017\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n<p><strong>\u4f7f\u7528\u9644\u52a0\u5b58\u50a8\u8fc7\u7a0b<\/strong><\/p>\n<pre>call mysql.innodb_index_stats(database(), table_name());<\/pre>\n<p>\u6b64\u5b58\u50a8\u8fc7\u7a0b\u63d0\u4f9b\u4e86\u6709\u5173\u6bcf\u4e2a\u7d22\u5f15\u7684\u8be6\u7ec6\u7edf\u8ba1\u4fe1\u606f\uff0c\u5305\u62ec\u5927\u5c0f\u548c\u5197\u4f59\u3002<\/p>\n<p><strong>\u5229\u7528 information_schema<\/strong><\/p>\n<pre>select table_schema, table_name, index_name, round(index_length \/ power(1024, 2), 2) as index_size_mb\nfrom information_schema.innodb_indexes\nwhere table_schema = 'your_database_name' and table_name = 'your_table_name';<\/pre>\n<p>\u6b64\u67e5\u8be2\u63d0\u4f9b\u6bcf\u4e2a\u7d22\u5f15\u7684\u78c1\u76d8\u5927\u5c0f\uff08\u5355\u4f4d\u4e3a mb\uff09\u3002<\/p>\n<p><strong>\u501f\u52a9 show index<\/strong><\/p>\n<pre>SHOW INDEX FROM TABLE_NAME;<\/pre>\n<p>\u6b64\u547d\u4ee4\u663e\u793a\u6bcf\u4e2a\u7d22\u5f15\u7684\u4fe1\u606f\uff0c\u5305\u62ec\u957f\u5ea6\u5217\uff0c\u8be5\u5217\u6307\u793a\u7d22\u5f15\u5360\u7528\u7684\u78c1\u76d8\u7a7a\u95f4\u5927\u5c0f\uff08\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\uff09\u3002<\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n<p>\u8bf7\u6ce8\u610f\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u53ef\u80fd\u4e0d\u9002\u7528\u4e8e\u6240\u6709 mysql \u7248\u672c\u3002\u5efa\u8bae\u5728\u751f\u4ea7\u73af\u5883\u4e2d\u6d4b\u8bd5\u8fd9\u4e9b\u65b9\u6cd5\u4e4b\u524d\u5148\u5728\u6d4b\u8bd5\u73af\u5883\u4e2d\u5c1d\u8bd5\u3002<\/p>\n<p>\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300a\u5982\u4f55\u51c6\u786e\u67e5\u770b MySQL \u7d22\u5f15\u7684\u78c1\u76d8\u7a7a\u95f4\u5360\u7528\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6570\u636e\u5e93\u77e5\u8bc6\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u51c6\u786e\u67e5\u770b MySQL \u7d22\u5f15\u7684&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-200568","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200568","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=200568"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200568\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200568"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200568"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200568"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}