{"id":1692,"date":"2025-07-23T16:07:23","date_gmt":"2025-07-23T08:07:23","guid":{"rendered":"https:\/\/www.yeetrack.com\/?p=1692"},"modified":"2025-10-17T08:32:31","modified_gmt":"2025-10-17T00:32:31","slug":"mysql%e5%a4%a7%e8%a1%a8%e4%bd%bf%e7%94%a8optimize%e4%bc%98%e5%8c%96%e7%a2%8e%e7%89%87%e7%a9%ba%e9%97%b4","status":"publish","type":"post","link":"https:\/\/www.yeetrack.com\/?p=1692","title":{"rendered":"mysql\u5927\u8868\u4f7f\u7528optimize\u4f18\u5316\u788e\u7247\u7a7a\u95f4"},"content":{"rendered":"

mysql\u5728\u4e92\u8054\u7f51\u884c\u4e1a\u5e94\u7528\u975e\u5e38\u5e7f\u6cdb\uff0c\u5c0f\u5230\u51e0\u4e2a\u4eba\u7684\u521b\u4e1a\u516c\u53f8\u3001\u5927\u5230\u4e00\u4e9b\u5de8\u5934\u516c\u53f8\u90fd\u5728\u7528\u3002\u5728\u8fd0\u7ef4mysql\u65f6\uff0c\u7ecf\u5e38\u4f1a\u9047\u5230\u5927\u8868\u95ee\u9898\uff1b\u5f53\u4e1a\u52a1\u6bd4\u8f83\u5c0f\u7684\u65f6\u5019\uff0c\u4e00\u822c\u91c7\u7528\u4e00\u4e3b\u4e00\u5907+\u5355\u8868\u8fdb\u884c\u5b58\u50a8\uff0c\u968f\u7740\u4e1a\u52a1\u53d1\u5c55\uff0c\u67d0\u4e9b\u4e1a\u52a1\u8868\u4e2d\u7684\u8bb0\u5f55\u5c31\u4f1a\u81a8\u80c0\u7684\u5389\u5bb3\uff0c\u51fa\u73b0\u51e0\u767e\u4e07\u3001\u751a\u81f3\u51e0\u5343\u4e07\u3001\u4e0a\u4ebf\u7684\u884c\u6570\u4e5f\u662f\u4f1a\u51fa\u73b0\u7684\u3002\u8fd9\u65f6\u5019\u5c31\u8981\u8003\u8651\u5bf9\u8868\u505a\u6539\u9020\u4e86\uff0c\u5e38\u89c4\u65b9\u6cd5\u90fd\u662f\u5206\u5e93\u5206\u8868\uff0c\u6309\u4e1a\u52a1\u5782\u76f4\u62c6\u5206\u6216\u8005\u6c34\u5e73\u62c6\u5206\u3002<\/p>\n

<\/p>\n

\u8fd9\u4e24\u5929\u516c\u53f8\u5185\u6709\u4e2a\u6d4b\u8bd5\u5e73\u53f0\u7684\u5e93\u57fa\u672c\u6ee1\u4e86\uff0c\u6709\u4e2a\u5e93\u5360\u4e86\u51e0\u767eG\u7684\u7a7a\u95f4\uff0c\u9700\u8981\u6e05\u7406\u4e00\u4e0b\u4e86\u3002 <\/p>\n

    \n
  1. \n

    \u5148\u770b\u770b\u54ea\u4e9b\u8868\u5360\u7528\u7a7a\u95f4\u5927 <\/p>\n

    SELECT table_name AS \u8868\u540d\n, ROUND((data_length + index_length) \/ 1024 \/ 1024, 2) AS \u603b\u5927\u5c0f_MB\n, ROUND(data_length \/ 1024 \/ 1024, 2) AS \u6570\u636e\u5927\u5c0f_MB\n, ROUND(index_length \/ 1024 \/ 1024, 2) AS \u7d22\u5f15\u5927\u5c0f_MB\n, ROUND(data_free \/ 1024 \/ 1024, 2) AS \u788e\u7247\u7a7a\u95f4_MB\n, table_rows AS \u884c\u6570, ROUND(avg_row_length, 2) AS \u5e73\u5747\u884c\u957f\nFROM information_schema.tables\nWHERE table_schema = 'your_table_name'\nORDER BY \u603b\u5927\u5c0f_MB DESC;<\/code><\/pre>\n
    \"\"<\/a>
    \n\u53ef\u4ee5\u770b\u5230case_run\u8868\u884c\u6570100\u591a\u4e07\uff0c\u5360\u7528\u7a7a\u95f4200G\uff0c\u7531\u4e8e\u8be5\u8868\u5b58\u50a8\u7684\u662f\u6d4b\u8bd5\u7528\u4f8b\u7684\u6267\u884c\u7ed3\u679c\uff0c\u5e76\u4e0d\u662f\u4ec0\u4e48\u91cd\u8981\u7684\u4e1a\u52a1\u6570\u636e\uff0c\u6240\u4ee5\u53ef\u4ee5\u6267\u884c\u5220\u6389\uff0c\u7136\u540e\u6e05\u7406\u78c1\u76d8\u788e\u7247\u5373\u53ef\u3002\u6ce8\uff1a\u5982\u679c\u662f\u7ebf\u4e0a\u4e1a\u52a1\uff0c\u4e00\u822c\u662f\u4e0d\u4f1a\u76f4\u63a5delete\u7684\u3002<\/p>\n<\/li>\n
  2. \n
    delete\u6bd4\u8f83\u8001\u7684\u6570\u636e\uff0c\u53ea\u7559\u4e0b\u6700\u8fd1\u51e0\u5468\u7684\u5373\u53ef
    \n\u7531\u4e8e\u8868\u91cc\u53ea\u6709\u4e3b\u952eid\u6709\u7d22\u5f15\uff0c\u5176\u4ed6\u5b57\u6bb5\u90fd\u6ca1\u6709\u7d22\u5f15\uff0c\u6240\u4ee5\u60f3\u67e5\u770b\u5177\u4f53\u884c\u6570\u975e\u5e38\u6162select count(1) from your_table_name<\/code>\uff0c\u8fd9\u8bed\u53e5\u4f1a\u626b\u5168\u8868\uff0c\u6267\u884c\u6548\u7387\u5f88\u4f4e\uff0c\u4e14\u6d6a\u8d39\u673a\u5668\u8d44\u6e90\u3002\u53ef\u4ee5\u76f4\u63a5\u67e5\u6700\u5927id\u548c\u6700\u5c0fid\uff0c\u6765\u5927\u81f4\u5224\u65ad\u5e93\u91cc\u6709\u591a\u5c11\u6570\u636e\uff0cselect max(id), min(id) from your_table_name<\/code>\uff0c\u7136\u540e\u76f4\u63a5delete from your_table_name where id < XXX<\/code>\u5220\u6389\u5373\u53ef\u3002
    \n\u5982\u679c\u8981\u5220\u7684\u8868\u6570\u636e\u5f88\u591a\uff0c\u6700\u597d\u662f\u5206\u6bb5\u5220\u9664\u3002  <\/p>\n<\/li>\n
  3. \n
    \u6e05\u7406\u78c1\u76d8\u788e\u7247
    \n\u6ce8\u610f\uff0cdelete\u8868\u6570\u636e\u4e4b\u540e\uff0cmysql\u662f\u4e0d\u4f1a\u76f4\u63a5\u6e05\u6389\u78c1\u76d8\u7a7a\u95f4\u7684\uff0c\u800c\u662f\u628a\u5220\u9664\u7684\u6570\u636e\u6253\u4e0a\u6807\u8bb0\uff0c\u7b49\u5230\u540e\u7eed\u518d\u6765\u8bb0\u5f55\u7684\u65f6\u5019\uff0c\u4f1a\u8986\u76d6\u8fd9\u4e9b\u8bb0\u5f55\uff0c\u6240\u4ee5\u5982\u679c\u60f3\u7acb\u523b\u56de\u6536\u78c1\u76d8\u7a7a\u95f4\uff0c\u8fd8\u9700\u8981\u5bf9mysql\u8868\u505a\u6e05\u7406\uff0c\u5373optimize table your_table_name<\/code>\u3002
    \n\u5728mysql innodb\u5f15\u64ce\uff0c5.7\u7248\u672c\u4ee5\u540e\uff0coptimize\u547d\u4ee4\u5df2\u7ecf\u4e0d\u4f1a\u5bf9\u6574\u4e2a\u8868\u52a0\u9501\u4e86\uff0c\u800c\u662f\u53ea\u5728\u5f00\u59cb\u548c\u590d\u5236\u540e\u77ed\u6682\u52a0\u9501\uff0c\u7406\u8bba\u4e0a\u53ea\u4f1a\u5f71\u54cd\u5f88\u77ed\u65f6\u95f4\uff0c\u6240\u4ee5\u4e0d\u5f71\u54cd\u5176\u4ed6\u589e\u5220\u6539\u67e5\u3002\u4f46\u662f\uff0c\u5bf9\u4e8e\u751f\u4ea7\u73af\u5883\uff0c\u6d41\u91cf\u5f88\u5927\u7684\u5e93\u8868\uff0c\u8fd8\u662f\u8981\u614e\u91cd\uff0c\u6700\u597d\u9009\u62e9\u665a\u4e0a\u6d41\u91cf\u5c11\u7684\u65f6\u95f4\uff0c\u5e76\u4e14\u8981\u505a\u6f14\u7ec3\u548c\u9884\u6848\u3002
    \n\u5220\u9664\u4e86\u5927\u90e8\u5206\u6570\u636e\u4e4b\u540e\uff0c\u6574\u4e2a\u8868\u5c0f\u4e86\u5f88\u591a
    \n    \"\"<\/a><\/p>\n<\/li>\n
  4. \n
    \u5982\u679c\u4e1a\u52a1\u80fd\u5141\u8bb8\u76f4\u63a5drop\u6216\u8005truncate\u8868\u662f\u7b80\u5355\u7684\uff0c\u79d2\u7ea7\u3002\u4e0d\u8fc7\u8981\u6ce8\u610f\u4e00\u70b9\uff0c\u5982\u679c\u662finnodb\u5f15\u64ce\uff0c\u5e76\u4e14\u6ca1\u6709\u5f00\u542finnodb_file_per_table<\/code>\u7684\u8bdd\uff0c\u662f\u4e0d\u662f\u7acb\u523b\u91ca\u653e\u78c1\u76d8\u7684\uff0c\u4e5f\u9700\u8981\u6267\u884coptimize table your_table_name<\/code>\u3002<\/p>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
    mysql\u5728\u4e92\u8054\u7f51\u884c\u4e1a\u5e94\u7528\u975e\u5e38\u5e7f\u6cdb\uff0c\u5c0f\u5230\u51e0\u4e2a\u4eba\u7684\u521b\u4e1a\u516c\u53f8\u3001\u5927\u5230\u4e00\u4e9b\u5de8\u5934\u516c\u53f8\u90fd\u5728\u7528\u3002\u5728\u8fd0\u7ef4mysql\u65f6\uff0c\u7ecf\u5e38\u4f1a\u9047\u5230\u5927\u8868\u95ee\u9898\uff1b\u5f53\u4e1a\u52a1\u6bd4\u8f83\u5c0f\u7684\u65f6\u5019\uff0c\u4e00\u822c\u91c7\u7528\u4e00\u4e3b\u4e00\u5907+\u5355\u8868\u8fdb\u884c\u5b58\u50a8\uff0c\u968f\u7740\u4e1a\u52a1\u53d1\u5c55\uff0c\u67d0\u4e9b\u4e1a\u52a1\u8868\u4e2d...<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"pgc_sgb_lightbox_settings":"","footnotes":""},"categories":[34],"tags":[56],"class_list":["post-1692","post","type-post","status-publish","format-standard","hentry","category-software","tag-mysql"],"views":279,"_links":{"self":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts\/1692","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1692"}],"version-history":[{"count":4,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts\/1692\/revisions"}],"predecessor-version":[{"id":1724,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts\/1692\/revisions\/1724"}],"wp:attachment":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1692"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1692"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1692"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}