{"id":223,"date":"2026-02-01T17:51:18","date_gmt":"2026-02-01T09:51:18","guid":{"rendered":"http:\/\/47.100.165.17\/wordpress\/?p=223"},"modified":"2026-03-02T22:28:51","modified_gmt":"2026-03-02T14:28:51","slug":"%e3%80%90mysql%e3%80%91%e7%89%88%e6%9c%ac%e7%89%b9%e6%80%a7%e5%85%a8%e6%a2%b3%e7%90%86","status":"publish","type":"post","link":"https:\/\/yunyanglib.cn\/?p=223","title":{"rendered":"\u3010MySQL\u3011\u7248\u672c\u7279\u6027\u5168\u68b3\u7406"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\" id=\"PIIgy\">1 MySQL 5.5\u7248\u672c\u7684\u4f18\u7f3a\u70b9<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"qqPfU\">1.1 MySQL 5.5\u5f15\u5165\u7684\u65b0\u529f\u80fd<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u534a\u540c\u6b65\u590d\u5236<\/strong>\uff1a\u4e3a\u964d\u4f4e\u6570\u636e\u4e22\u5931\u98ce\u9669\uff0cMySQL 5.5\u65b0\u589e\u534a\u540c\u6b65\u590d\u5236\u673a\u5236\u3002\u4e3b\u670d\u52a1\u5668\u9700\u5728\u81f3\u5c11\u4e00\u4e2a\u4ece\u670d\u52a1\u5668\u786e\u8ba4\u63a5\u6536\u4e8b\u52a1\u65e5\u5fd7\u540e\u624d\u63d0\u4ea4\u4e8b\u52a1\uff0c\u5728\u6570\u636e\u4e00\u81f4\u6027\u4e0e\u6027\u80fd\u95f4\u5b9e\u73b0\u5e73\u8861\u3002<\/li>\n\n\n\n<li><strong>\u5b9e\u65f6\u7ebf\u7a0b\u4f18\u5316<\/strong>\uff1a\u9488\u5bf9\u5b9e\u65f6\u6570\u636e\u6d41\u573a\u666f\uff08\u5982\u5b9e\u65f6\u6570\u636e\u91c7\u96c6\u3001\u5b9e\u65f6\u62a5\u544a\u751f\u6210\u7b49\uff09\uff0c\u4f18\u5316\u4e86\u7ebf\u7a0b\u5904\u7406\u903b\u8f91\uff0c\u63d0\u5347\u5b9e\u65f6\u6570\u636e\u5904\u7406\u6548\u7387\u3002<\/li>\n\n\n\n<li><strong>Buffer Pool\u5206\u5b9e\u4f8b<\/strong>\uff1a\u652f\u6301\u5c06InnoDB Buffer Pool\u5212\u5206\u4e3a\u591a\u4e2a\u72ec\u7acb\u5b9e\u4f8b\uff0c\u51cf\u5c11\u5185\u5b58\u7ade\u4e89\uff0c\u66f4\u9ad8\u6548\u5229\u7528\u591a\u6838\u5904\u7406\u5668\u8d44\u6e90\uff0c\u95f4\u63a5\u63d0\u5347\u67e5\u8be2\u54cd\u5e94\u901f\u5ea6\u3002<\/li>\n\n\n\n<li><strong>\u5143\u6570\u636e\u9501\u5b9a\uff08MDL\uff09<\/strong>\uff1a\u6267\u884cDDL\u8bed\u53e5\u65f6\u81ea\u52a8\u83b7\u53d6\u5143\u6570\u636e\u9501\uff0c\u907f\u514d\u5e76\u53d1\u4fee\u6539\u8868\u7ed3\u6784\u5bfc\u81f4\u7684\u6570\u636e\u4e0d\u4e00\u81f4\u95ee\u9898\uff0c\u4fdd\u969c\u4e8b\u52a1\u95f4\u7684\u6b63\u786e\u6027\u3002<\/li>\n\n\n\n<li><strong>\u9ed8\u8ba4\u5b58\u50a8\u5f15\u64ce\u5207\u6362\u4e3aInnoDB<\/strong>\uff1a\u66ff\u4ee3MyISAM\u6210\u4e3a\u9ed8\u8ba4\u5b58\u50a8\u5f15\u64ce\uff0c\u501f\u52a9InnoDB\u5bf9\u4e8b\u52a1\u3001\u884c\u7ea7\u9501\u53ca\u5916\u952e\u7ea6\u675f\u7684\u652f\u6301\uff0c\u589e\u5f3a\u6570\u636e\u5b8c\u6574\u6027\u4e0e\u6545\u969c\u6062\u590d\u80fd\u529b\u3002<\/li>\n\n\n\n<li><strong>\u5b89\u5168\u6027\u589e\u5f3a<\/strong>\uff1a\u5f3a\u5316\u5bc6\u7801\u7b56\u7565\uff08\u5982\u590d\u6742\u5ea6\u8981\u6c42\u3001\u8fc7\u671f\u8bbe\u7f6e\uff09\u3001\u652f\u6301SSL\/TLS\u52a0\u5bc6\u8fde\u63a5\uff0c\u5e76\u4f18\u5316\u7528\u6237\u6743\u9650\u7ba1\u7406\uff0c\u63d0\u5347\u7cfb\u7edf\u6297\u672a\u6388\u6743\u8bbf\u95ee\u80fd\u529b\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"hWWBY\">1.2 MySQL 5.5\u7684\u7f3a\u70b9<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5168\u6587\u641c\u7d22\u5c40\u9650<\/strong>\uff1a\u5168\u6587\u7d22\u5f15\u4ec5\u652f\u6301MyISAM\u5f15\u64ce\uff0c\u4e0d\u517c\u5bb9InnoDB\u2014\u2014\u800cInnoDB\u56e0\u652f\u6301\u4e8b\u52a1\u66f4\u53d7\u63a8\u8350\uff0c\u8fd9\u5bfc\u81f4\u4f7f\u7528InnoDB\u65f6\u65e0\u6cd5\u76f4\u63a5\u501f\u52a9\u5185\u7f6e\u5168\u6587\u641c\u7d22\u529f\u80fd\uff0c\u9700\u8fc1\u79fb\u81f3MyISAM\u6216\u4f9d\u8d56Sphinx\u3001Solr\u7b49\u7b2c\u4e09\u65b9\u5de5\u5177\u5b9e\u73b0\u9ad8\u6548\u6587\u672c\u68c0\u7d22\u3002<\/li>\n\n\n\n<li><strong>\u5355\u7ebf\u7a0b\u590d\u5236\u74f6\u9888<\/strong>\uff1a\u91c7\u7528\u5355\u7ebf\u7a0b\u590d\u5236\u673a\u5236\uff0c\u5728\u9ad8\u5e76\u53d1\u5199\u5165\u573a\u666f\u4e0b\u6613\u51fa\u73b0\u540c\u6b65\u5ef6\u8fdf\u3002\u5355\u4e00\u590d\u5236\u7ebf\u7a0b\u96be\u4ee5\u5e94\u5bf9\u9ad8\u8d1f\u8f7d\uff0c\u6210\u4e3a\u6027\u80fd\u77ed\u677f\uff08\u540e\u7eed\u7248\u672c\u901a\u8fc7\u591a\u7ebf\u7a0b\u590d\u5236\u90e8\u5206\u89e3\u51b3\u6b64\u95ee\u9898\uff09\u3002<\/li>\n\n\n\n<li><strong>\u5e76\u53d1\u5904\u7406\u80fd\u529b\u4e0d\u8db3<\/strong>\uff1a\u9762\u5bf9\u5927\u91cf\u5e76\u53d1\u8bf7\u6c42\u65f6\uff0c\u6613\u56e0\u9501\u7ade\u4e89\u3001\u7f13\u5b58\u547d\u4e2d\u7387\u4f4e\u3001\u67e5\u8be2\u4f18\u5316\u4e0d\u8db3\u7b49\u95ee\u9898\u5bfc\u81f4\u54cd\u5e94\u5ef6\u8fdf\u751a\u81f3\u8d85\u65f6\u3002\u6b64\u5916\uff0cInnoDB\u7f13\u51b2\u6c60\u5bb9\u91cf\u6709\u9650\uff0c\u9650\u5236\u4e86\u5927\u89c4\u6a21\u6570\u636e\u573a\u666f\u7684\u5904\u7406\u80fd\u529b\uff0c\u9700\u901a\u8fc7\u7cbe\u7ec6\u914d\u7f6e\u6216\u5206\u5e93\u5206\u8868\u7b49\u7b56\u7565\u7f13\u89e3\u538b\u529b\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Xz4dZ\">1.3 \u601d\u7ef4\u5bfc\u56fe<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"http:\/\/47.100.165.17\/wordpress\/wp-content\/uploads\/2026\/02\/image-2.png\" alt=\"\" class=\"wp-image-227\"\/><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"ybEe0\">2 MySQL 5.6\u7248\u672c\u7684\u4f18\u7f3a\u70b9<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"s7p41\">2.1 MySQL 5.6\u5f15\u5165\u7684\u65b0\u529f\u80fd<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ub87edec0\">MySQL 5.6\u901a\u8fc7\u591a\u9879\u529f\u80fd\u5347\u7ea7\uff0c\u663e\u8457\u63d0\u5347\u4e86\u6570\u636e\u5e93\u7684\u6027\u80fd\u3001\u5b89\u5168\u6027\u4e0e\u53ef\u7ba1\u7406\u6027\uff0c\u6838\u5fc3\u7279\u6027\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>GTID\u590d\u5236\u652f\u6301<\/strong>\uff1a\u5168\u5c40\u4e8b\u52a1\u6807\u8bc6\u7b26\uff08Global Transaction Identifiers\uff0cGTIDs\uff09\u4e3a\u590d\u5236\u63d0\u4f9b\u552f\u4e00\u4e8b\u52a1\u6807\u8bc6\uff0c\u7b80\u5316\u4e3b\u4ece\u5173\u7cfb\u914d\u7f6e\u4e0e\u6545\u969c\u6062\u590d\u3002\u501f\u52a9GTID\uff0c\u53ef\u5feb\u901f\u8bc6\u522b\u5e76\u8df3\u8fc7\u9519\u8bef\u4e8b\u52a1\uff0c\u63d0\u5347\u590d\u5236\u53ef\u9760\u6027\u3002<\/li>\n\n\n\n<li><strong>\u5bc6\u7801\u7b56\u7565\u7cbe\u7ec6\u5316<\/strong>\uff1a\u5141\u8bb8\u7ba1\u7406\u5458\u914d\u7f6e\u66f4\u4e25\u683c\u7684\u5bc6\u7801\u89c4\u5219\uff08\u5982\u957f\u5ea6\u3001\u590d\u6742\u5ea6\u3001\u5b9a\u671f\u66f4\u6362\u8981\u6c42\uff09\uff0c\u964d\u4f4e\u5f31\u5bc6\u7801\u5bfc\u81f4\u7684\u5b89\u5168\u98ce\u9669\u3002<\/li>\n\n\n\n<li><strong>\u5143\u6570\u636e\u9501\u4f18\u5316<\/strong>\uff1a\u6539\u8fdb\u6b64\u524d\u7248\u672c\u4e2dDDL\u8bed\u53e5\u53ef\u80fd\u5bfc\u81f4\u7684\u957f\u65f6\u95f4\u8868\u7ea7\u9501\u95ee\u9898\uff0c\u51cf\u5c11\u9501\u7684\u6301\u6709\u65f6\u95f4\u4e0e\u8303\u56f4\uff0c\u63d0\u5347\u5e76\u53d1\u5904\u7406\u80fd\u529b\u3002<\/li>\n\n\n\n<li><strong>\u5e93\u7ea7\u522b\u5e76\u884c\u590d\u5236<\/strong>\uff1a\u7a81\u7834\u5355\u7ebf\u7a0b\u590d\u5236\u9650\u5236\uff0c\u652f\u6301\u4e0d\u540c\u6570\u636e\u5e93\u95f4\u7684\u590d\u5236\u4efb\u52a1\u5e76\u884c\u6267\u884c\uff0c\u52a0\u901f\u591a\u5e93\u73af\u5883\u4e0b\u7684\u540c\u6b65\u6548\u7387\u3002<\/li>\n\n\n\n<li><strong>\u67e5\u8be2\u6548\u7387\u4f18\u5316\uff08ICP\u4e0eMRR\uff09<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>ICP\uff08Index Condition Pushdown\uff0c\u7d22\u5f15\u6761\u4ef6\u4e0b\u63a8\uff09<\/strong>\uff1a\u5c06\u90e8\u5206WHERE\u6761\u4ef6\u4e0b\u63a8\u81f3\u5b58\u50a8\u5f15\u64ce\u5c42\u8fc7\u6ee4\u7d22\u5f15\u8bb0\u5f55\uff0c\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684I\/O\u64cd\u4f5c\u3002<\/li>\n\n\n\n<li><strong>MRR\uff08Multi-Range Read\uff0c\u591a\u8303\u56f4\u8bfb\u53d6\uff09<\/strong>\uff1a\u901a\u8fc7\u6279\u91cf\u5904\u7406\u76f8\u90bb\u6570\u636e\u5757\u51cf\u5c11\u78c1\u76d8\u5bfb\u9053\uff0c\u52a0\u901f\u591a\u8303\u56f4\u6570\u636e\u68c0\u7d22\u3002<\/li>\n<\/ul>\n\n\n\n<ol start=\"6\" class=\"wp-block-list\">\n<li><strong>Undo Log\u72ec\u7acb\u5b58\u50a8<\/strong>\uff1a\u652f\u6301\u5c06undo log\u4ece\u7cfb\u7edf\u8868\u7a7a\u95f4\u5206\u79bb\u81f3\u72ec\u7acb\u6587\u4ef6\uff0c\u4fbf\u4e8e\u7ba1\u7406\u4e0e\u5907\u4efd\uff0c\u540c\u65f6\u964d\u4f4e\u5355\u4e00\u8868\u7a7a\u95f4\u8fc7\u5927\u7684\u98ce\u9669\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"TgDJu\">2.2 MySQL 5.6\u7684\u7f3a\u70b9<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5e76\u884c\u590d\u5236\u6548\u7387\u53d7\u9650<\/strong>\uff1a\u5e93\u7ea7\u522b\u5e76\u884c\u590d\u5236\u4ec5\u5728\u5404\u6570\u636e\u5e93\u8d1f\u8f7d\u5b8c\u5168\u72ec\u7acb\u65f6\u6709\u6548\uff0c\u5bf9\u4e8e\u8de8\u5e93\u64cd\u4f5c\u7684\u5e94\u7528\uff0c\u53ef\u80fd\u56e0\u8d44\u6e90\u7ade\u4e89\u964d\u4f4e\u6027\u80fd\u3002<\/li>\n\n\n\n<li><strong>\u5168\u5c40\u53c2\u6570\u4e0d\u53ef\u52a8\u6001\u8c03\u6574<\/strong>\uff1a\u7f13\u51b2\u6c60\u5927\u5c0f\u3001\u8fde\u63a5\u6570\u9650\u5236\u7b49\u5173\u952e\u914d\u7f6e\u9700\u4fee\u6539\u914d\u7f6e\u6587\u4ef6\u5e76\u91cd\u542f\u670d\u52a1\u624d\u80fd\u751f\u6548\uff0c\u65e0\u6cd5\u5e94\u5bf9\u7a81\u53d1\u6d41\u91cf\u6216\u5b9e\u65f6\u8c03\u4f18\u9700\u6c42\uff0c\u5f71\u54cd\u9ad8\u53ef\u7528\u6027\u3002<\/li>\n\n\n\n<li><strong>\u65e0\u539f\u751fJSON\u652f\u6301<\/strong>\uff1a\u5904\u7406\u534a\u7ed3\u6784\u5316\u6570\u636e\u65f6\u9700\u4f9d\u8d56\u989d\u5916\u89e3\u6790\u903b\u8f91\uff0c\u589e\u52a0\u5f00\u53d1\u590d\u6742\u5ea6\u4e0e\u67e5\u8be2\u6210\u672c\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"kOhmf\">2.3 \u601d\u7ef4\u5bfc\u56fe<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"http:\/\/47.100.165.17\/wordpress\/wp-content\/uploads\/2026\/02\/image-3.png\" alt=\"\" class=\"wp-image-228\"\/><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"DU34P\">3 MySQL 5.7\u7248\u672c\u7684\u4f18\u7f3a\u70b9<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"FE2yn\">3.1 MySQL 5.7\u5f15\u5165\u7684\u65b0\u529f\u80fd<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u21216d09\">MySQL 5.7\u5728\u6027\u80fd\u3001\u53ef\u9760\u6027\u4e0e\u7075\u6d3b\u6027\u4e0a\u5b9e\u73b0\u663e\u8457\u7a81\u7834\uff0c\u6838\u5fc3\u5347\u7ea7\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u7ec4\u590d\u5236<\/strong>\uff1a\u57fa\u4e8e\u5206\u5e03\u5f0f\u7b97\u6cd5\u7684\u9ad8\u53ef\u7528\u65b9\u6848\uff0c\u53ef\u5728\u591a\u670d\u52a1\u5668\u95f4\u540c\u6b65\u6570\u636e\uff0c\u5373\u4f7f\u906d\u9047\u7f51\u7edc\u6545\u969c\u6216\u8282\u70b9\u4e0b\u7ebf\uff0c\u4ecd\u80fd\u4fdd\u969c\u6570\u636e\u4e00\u81f4\u6027\uff0c\u7b80\u5316\u5bb9\u9519\u4e0e\u6269\u5c55\u67b6\u6784\u642d\u5efa\u3002<\/li>\n\n\n\n<li><strong>WRITESET\u5e76\u884c\u590d\u5236<\/strong>\uff1a\u901a\u8fc7\u8bc6\u522b\u65e0\u51b2\u7a81\u7684\u6570\u636e\u4fee\u6539\uff0c\u5141\u8bb8\u4e3b\u4ece\u590d\u5236\u4e2d\u5e76\u884c\u5904\u7406\u4e8b\u52a1\uff0c\u51cf\u5c11\u540c\u6b65\u5ef6\u8fdf\uff0c\u63d0\u5347\u590d\u5236\u6548\u7387\u3002<\/li>\n\n\n\n<li><strong>\u865a\u62df\u5217<\/strong>\uff1a\u652f\u6301\u52a8\u6001\u8ba1\u7b97\u5b57\u6bb5\uff08\u57fa\u4e8e\u5176\u4ed6\u5217\u503c\u5b9e\u65f6\u751f\u6210\uff0c\u4e0d\u5b9e\u9645\u5b58\u50a8\uff09\uff0c\u9002\u7528\u4e8e\u9891\u7e41\u590d\u6742\u8ba1\u7b97\u573a\u666f\uff0c\u51cf\u5c11\u5197\u4f59\u5b58\u50a8\u3002<\/li>\n\n\n\n<li><strong>\u539f\u751fJSON\u652f\u6301<\/strong>\uff1a\u76f4\u63a5\u63d0\u4f9bJSON\u6570\u636e\u7684\u89e3\u6790\u3001\u641c\u7d22\u3001\u66f4\u65b0\u7b49\u64cd\u4f5c\u80fd\u529b\uff0c\u517c\u987e\u534a\u7ed3\u6784\u5316\u6570\u636e\u5b58\u50a8\u4e0e\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7684\u4f18\u52bf\u3002<\/li>\n\n\n\n<li><strong>\u5168\u5c40\u53c2\u6570\u52a8\u6001\u8c03\u6574<\/strong>\uff1a\u591a\u6570\u914d\u7f6e\u9009\u9879\u53ef\u5728\u7ebf\u4fee\u6539\u65e0\u9700\u91cd\u542f\uff0c\u4fbf\u4e8e\u7ba1\u7406\u5458\u6839\u636e\u8d1f\u8f7d\u5b9e\u65f6\u4f18\u5316\u6027\u80fd\u3002<\/li>\n\n\n\n<li><strong>InnoDB\u4e34\u65f6\u8868<\/strong>\uff1a\u4e34\u65f6\u8868\u53ef\u5b58\u50a8\u4e8e\u78c1\u76d8\u5e76\u4f7f\u7528InnoDB\u5f15\u64ce\uff0c\u89e3\u51b3\u5927\u5bb9\u91cf\u4e34\u65f6\u6570\u636e\u7684\u5185\u5b58\u4e0d\u8db3\u95ee\u9898\uff0c\u4fdd\u969c\u8bbf\u95ee\u6548\u7387\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"RnMhK\">3.2 MySQL 5.7\u7684\u7f3a\u70b9<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u793e\u533a\u7248\u7aef\u53e3\u914d\u7f6e\u53d7\u9650<\/strong>\uff1a\u4ec5\u652f\u6301\u9ed8\u8ba43306\u7aef\u53e3\uff0c\u975e\u9ed8\u8ba4\u7aef\u53e3\u9700\u624b\u52a8\u914d\u7f6e\uff0c\u589e\u52a0\u590d\u6742\u5ea6\u4e0e\u6f5c\u5728\u5b89\u5168\u98ce\u9669\u3002<\/li>\n\n\n\n<li><strong>\u5927\u8868\u52a0\u5217\u6210\u672c\u9ad8<\/strong>\uff1a\u5411\u5927\u6570\u636e\u91cf\u8868\u6dfb\u52a0\u65b0\u5217\u65f6\uff0c\u9700\u521b\u5efa\u4e34\u65f6\u8868\u5e76\u590d\u5236\u6570\u636e\uff0c\u8fc7\u7a0b\u8017\u65f6\u4e14\u5360\u7528\u5927\u91cf\u8d44\u6e90\uff0c\u53ef\u80fd\u5f71\u54cd\u5e94\u7528\u53ef\u7528\u6027\u3002<\/li>\n\n\n\n<li><strong>\u7ebf\u7a0b\u4f18\u5148\u7ea7\u5747\u4e00\u6027\u95ee\u9898<\/strong>\uff1a\u6240\u6709\u540e\u53f0\u7ebf\u7a0b\u5171\u4eab\u76f8\u540c\u4f18\u5148\u7ea7\u4e0e\u8d44\u6e90\uff0c\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\u53ef\u80fd\u51fa\u73b0\u5173\u952e\u4efb\u52a1\u88ab\u4f4e\u4f18\u5148\u7ea7\u4efb\u52a1\u963b\u585e\u7684\u6027\u80fd\u74f6\u9888\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"cypjz\">3.3 \u601d\u7ef4\u5bfc\u56fe<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"http:\/\/47.100.165.17\/wordpress\/wp-content\/uploads\/2026\/02\/image-4.png\" alt=\"\" class=\"wp-image-230\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"ZAfZ0\">3.4 \u5b9e\u9a8c\uff1a\u865a\u62df\u5217\u529f\u80fd\u9a8c\u8bc1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u0184c641\"><strong>\u6b65\u9aa41\uff1a\u521b\u5efa\u85aa\u8d44\u8868\uff08\u542b\u865a\u62df\u5217\uff09<\/strong><\/p>\n\n\n\n<pre id=\"ANQdH\" class=\"wp-block-code\"><code>create table salary_info ( \n  id int auto_increment primary key, \n  name varchar(10) comment '\u5458\u5de5\u59d3\u540d', \n  salary_hourly DECIMAL(10,2) comment '\u65f6\u85aa', \n  hours_worked int comment '\u5de5\u4f5c\u65f6\u957f\uff08\u5355\u4f4d\uff1a\u5c0f\u65f6\uff09', \n  salary DECIMAL(10,2) as (salary_hourly * hours_worked)  -- \u865a\u62df\u5217\uff1a\u81ea\u52a8\u8ba1\u7b97\u85aa\u8d44\n);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u671f53f9\"><strong>\u6b65\u9aa42\uff1a\u63d2\u5165\u6d4b\u8bd5\u6570\u636e<\/strong><\/p>\n\n\n\n<pre id=\"yoH6H\" class=\"wp-block-code\"><code>insert into salary_info(name,salary_hourly,hours_worked) values ('a',100,8);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"udd3ebf03\"><strong>\u6b65\u9aa43\uff1a\u67e5\u8be2\u7ed3\u679c<\/strong><\/p>\n\n\n\n<pre id=\"REaFK\" class=\"wp-block-code\"><code>select * from salary_info;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ua6d6af66\">\u53ef\u76f4\u63a5\u83b7\u53d6\u865a\u62df\u5217<code>salary<\/code>\u7684\u8ba1\u7b97\u7ed3\u679c\uff08\u5982<code>800.00<\/code>\uff09\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"546\" height=\"152\" src=\"http:\/\/47.100.165.17\/wordpress\/wp-content\/uploads\/2026\/02\/image-5.png\" alt=\"\" class=\"wp-image-231\" srcset=\"https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/02\/image-5.png 546w, https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/02\/image-5-300x84.webp 300w\" sizes=\"(max-width: 546px) 100vw, 546px\" \/><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"FNqMn\">4 MySQL 8.0\u7684\u65b0\u7279\u6027<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"uaeff2863\">MySQL 8.0\u901a\u8fc7\u4e00\u7cfb\u5217\u7a81\u7834\u6027\u5347\u7ea7\uff0c\u5f3a\u5316\u4e86\u6027\u80fd\u3001\u5b89\u5168\u6027\u4e0e\u5f00\u53d1\u6548\u7387\uff0c\u6838\u5fc3\u7279\u6027\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u4e8b\u52a1\u6027\u6570\u636e\u5b57\u5178<\/strong>\uff1a\u5c06\u5143\u6570\u636e\u4ece\u6587\u4ef6\u7cfb\u7edf\u8fc1\u79fb\u81f3InnoDB\u5b58\u50a8\u5f15\u64ce\uff0c\u501f\u52a9ACID\u7279\u6027\u4fdd\u969c\u5143\u6570\u636e\u53d8\u66f4\u7684\u539f\u5b50\u6027\uff08\u652f\u6301\u56de\u6eda\/\u63d0\u4ea4\uff09\uff0c\u63d0\u5347\u7cfb\u7edf\u7a33\u5b9a\u6027\u3002<\/li>\n\n\n\n<li><strong>\u5feb\u901f\u52a0\u5217<\/strong>\uff1a\u9488\u5bf9\u5927\u578b\u8868\u7684\u5217\u6dfb\u52a0\u64cd\u4f5c\uff0c\u53ef\u901a\u8fc7\u4ec5\u66f4\u65b0\u5143\u6570\u636e\u5b9e\u73b0\u5373\u65f6\u5b8c\u6210\uff0c\u65e0\u9700\u9501\u8868\u6216\u590d\u5236\u5168\u8868\uff0c\u663e\u8457\u51cf\u5c11\u505c\u673a\u65f6\u95f4\u3002<\/li>\n\n\n\n<li><strong>\u539f\u5b50DDL<\/strong>\uff1a\u6240\u6709DDL\u8bed\u53e5\u539f\u5b50\u6267\u884c\uff08\u8981\u4e48\u5168\u6210\u3001\u8981\u4e48\u5168\u4e0d\u6267\u884c\uff09\uff0c\u907f\u514d\u590d\u6742\u7ed3\u6784\u53d8\u66f4\u5bfc\u81f4\u7684\u6570\u636e\u5e93\u4e0d\u4e00\u81f4\u3002<\/li>\n\n\n\n<li><strong>\u4e0d\u53ef\u89c1\u7d22\u5f15<\/strong>\uff1a\u652f\u6301\u4e34\u65f6\u201c\u9690\u85cf\u201d\u7d22\u5f15\uff08\u65e0\u9700\u5220\u9664\uff09\uff0c\u4fbf\u4e8e\u6d4b\u8bd5\u7d22\u5f15\u5bf9\u67e5\u8be2\u7684\u5f71\u54cd\uff0c\u4fdd\u7559\u968f\u65f6\u542f\u7528\u7684\u7075\u6d3b\u6027\u3002<\/li>\n\n\n\n<li><strong>\u964d\u5e8f\u7d22\u5f15<\/strong>\uff1a\u76f4\u63a5\u521b\u5efa\u6309\u5b57\u6bb5\u503c\u964d\u5e8f\u6392\u5217\u7684\u7d22\u5f15\uff0c\u7b80\u5316\u5012\u5e8f\u67e5\u8be2\u7f16\u5199\uff0c\u63d0\u5347\u7279\u5b9a\u573a\u666f\u6027\u80fd\u3002<\/li>\n\n\n\n<li><strong>\u89d2\u8272\u7ba1\u7406<\/strong>\uff1a\u652f\u6301\u5b9a\u4e49\u6743\u9650\u96c6\u5408\uff08\u89d2\u8272\uff09\u5e76\u6279\u91cf\u5206\u914d\u7ed9\u7528\u6237\uff0c\u7b80\u5316\u6743\u9650\u7ef4\u62a4\u3002<\/li>\n\n\n\n<li><strong>\u8d44\u6e90\u7ec4<\/strong>\uff1a\u53ef\u5bf9\u7ebf\u7a0b\u7684CPU\u8d44\u6e90\u8bbf\u95ee\u8fdb\u884c\u7ba1\u63a7\uff0c\u901a\u8fc7\u5206\u7ec4\u8c03\u6574\u4efb\u52a1\u4f18\u5148\u7ea7\uff0c\u4f18\u5316\u8d44\u6e90\u5206\u914d\u3002<\/li>\n\n\n\n<li><strong>\u5168\u5c40\u53d8\u91cf\u6301\u4e45\u5316<\/strong>\uff1a\u90e8\u5206\u5168\u5c40\u53c2\u6570\u7684\u914d\u7f6e\u53ef\u8de8\u91cd\u542f\u4fdd\u7559\uff0c\u907f\u514d\u91cd\u590d\u914d\u7f6e\u3002<\/li>\n\n\n\n<li><strong>Hash Join\u7b97\u6cd5<\/strong>\uff1a\u65b0\u589e\u54c8\u5e0c\u8fde\u63a5\u5b9e\u73b0\uff0c\u4f18\u5316\u5927\u6570\u636e\u96c6\u5173\u8054\u67e5\u8be2\u6027\u80fd\u3002<\/li>\n\n\n\n<li><strong>\u591a\u7aef\u53e3\u652f\u6301<\/strong>\uff1a\u9664\u9ed8\u8ba43306\u7aef\u53e3\u5916\uff0c\u53ef\u914d\u7f6e\u989d\u5916\u670d\u52a1\u7aef\u53e3\uff0c\u9002\u914d\u590d\u6742\u7f51\u7edc\u73af\u5883\u3002<\/li>\n\n\n\n<li><strong>\u81ea\u589e\u4e3b\u952e\u6301\u4e45\u5316<\/strong>\uff1a\u670d\u52a1\u5668\u91cd\u542f\u540e\u53ef\u6b63\u786e\u6062\u590d\u81ea\u589eID\u7684\u6700\u5927\u503c\uff0c\u4fdd\u969c\u8fde\u7eed\u6027\u4e0e\u552f\u4e00\u6027\u3002<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"XT55L\">5 MySQL\u65b0\u7279\u6027-\u4e8b\u52a1\u6027\u6570\u636e\u5b57\u5178<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"O7NI4\">5.1 \u4e8b\u52a1\u6027\u6570\u636e\u5b57\u5178\u662f\u4ec0\u4e48<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u6ed35ae1\">\u4e8b\u52a1\u6027\u6570\u636e\u5b57\u5178\u662f\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\u7684\u6838\u5fc3\u7ec4\u4ef6\uff0c\u7528\u4e8e\u5b58\u50a8\u8868\u3001\u5b57\u6bb5\u3001\u7d22\u5f15\u7b49\u7ed3\u6784\u4fe1\u606f\u3002MySQL\u4e0d\u540c\u7248\u672c\u7684\u5b9e\u73b0\u5dee\u5f02\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6570\u636e\u5b57\u5178\u5b9a\u4e49<\/strong>\uff1a\u96c6\u4e2d\u5b58\u50a8\u6570\u636e\u5e93\u7ed3\u6784\u63cf\u8ff0\uff08\u5982\u8868\u540d\u3001\u5b57\u6bb5\u7c7b\u578b\u3001\u7ea6\u675f\u7b49\uff09\uff0c\u4e3a\u5e94\u7528\u8bbf\u95ee\u6570\u636e\u63d0\u4f9b\u57fa\u7840\u5143\u4fe1\u606f\u3002<\/li>\n\n\n\n<li><strong>8.0\u4e4b\u524d\u7248\u672c<\/strong>\uff1a\u5143\u6570\u636e\u4ee5\u6587\u4ef6\u5f62\u5f0f\u5b58\u50a8\uff0c\u5305\u62ec\uff1a<\/li>\n\n\n\n<li><code>db.opt<\/code>\uff1a\u6570\u636e\u5e93\u521b\u5efa\u57fa\u672c\u4fe1\u606f\uff1b<\/li>\n\n\n\n<li><code>.frm<\/code>\u6587\u4ef6\uff1a\u8868\u7ed3\u6784\u5b9a\u4e49\uff1b<\/li>\n\n\n\n<li><code>.ibd<\/code>\u6587\u4ef6\uff1a\u6570\u636e\u4e0e\u7d22\u5f15\u5b9e\u9645\u5b58\u50a8\u3002<\/li>\n\n\n\n<li><strong>8.0\u7248\u672c\u4e8b\u52a1\u6027\u6570\u636e\u5b57\u5178<\/strong>\uff1a\u5c06\u6240\u6709\u5143\u6570\u636e\u8fc1\u79fb\u81f3InnoDB\u7ba1\u7406\uff0c\u501f\u52a9\u5176ACID\u7279\u6027\u4fdd\u62a4\u5143\u6570\u636e\u5b8c\u6574\u6027\u3002\u5373\u4f7f\u906d\u9047\u65ad\u7535\u7b49\u5f02\u5e38\uff0c\u4e5f\u53ef\u901a\u8fc7\u65e5\u5fd7\u91cd\u505a\u6062\u590d\uff0c\u907f\u514d\u5143\u6570\u636e\u4e22\u5931\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"uet8m\">5.2 \u6570\u636e\u5b57\u5178\u7684\u597d\u5904<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4fdd\u969c\u5143\u6570\u636e\u4e0e\u4e1a\u52a1\u6570\u636e\u7684\u4e00\u81f4\u6027\uff1b<\/li>\n\n\n\n<li>\u652f\u6301\u5143\u6570\u636e\u64cd\u4f5c\u7684\u4e8b\u52a1\u56de\u6eda\u4e0e\u6545\u969c\u6062\u590d\uff1b<\/li>\n\n\n\n<li>\u7b80\u5316\u7ba1\u7406\u6d41\u7a0b\uff0c\u63d0\u5347\u7cfb\u7edf\u6269\u5c55\u6027\u4e0e\u6027\u80fd\u3002<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"X3jU6\">6 MySQL 8.0\u65b0\u7279\u6027-\u5feb\u901f\u52a0\u5217<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"M0e5F\">6.1 8.0\u4e4b\u524d\u7248\u672c\u52a0\u5217\u7684\u95ee\u9898<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6613\u5bfc\u81f4\u4e3b\u4ece\u540c\u6b65\u5ef6\u8fdf\uff1b<\/li>\n\n\n\n<li>\u5360\u7528\u5927\u91cfCPU\u3001IO\u8d44\u6e90\uff1b<\/li>\n\n\n\n<li>\u64cd\u4f5c\u8017\u65f6\uff08\u968f\u8868\u6570\u636e\u91cf\u589e\u957f\u800c\u589e\u52a0\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Fhkxc\">6.2 MySQL\u52a0\u5217\u7684\u4e09\u79cd\u7b97\u6cd5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u9bb8c9d0\">\u5411\u8868\u4e2d\u6dfb\u52a0\u65b0\u5217\u65f6\uff0cMySQL\u652f\u6301\u4e09\u79cd\u7b97\u6cd5\uff0c\u9002\u7528\u573a\u666f\u4e0d\u540c\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>COPY\uff08\u590d\u5236\uff09<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8fc7\u7a0b\uff1a\u521b\u5efa\u4e34\u65f6\u8868\uff0c\u590d\u5236\u539f\u8868\u6570\u636e\u53ca\u65b0\u5217\u4fe1\u606f\u540e\u66ff\u6362\u65e7\u8868\uff1b<\/li>\n\n\n\n<li>\u4f18\u52bf\uff1a\u517c\u5bb9\u6027\u5f3a\uff0c\u9002\u7528\u4e8e\u591a\u6570\u573a\u666f\uff1b<\/li>\n\n\n\n<li>\u52a3\u52bf\uff1a\u8017\u65f6\u4e45\u3001\u8d44\u6e90\u6d88\u8017\u5927\uff0c\u8fc7\u7a0b\u4e2d\u8868\u4f1a\u88ab\u9501\u5b9a\u3002<\/li>\n<\/ul>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>INPLACE\uff08\u5c31\u5730\u66f4\u65b0\uff09<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8fc7\u7a0b\uff1a\u76f4\u63a5\u4fee\u6539\u73b0\u6709\u6587\u4ef6\u7ed3\u6784\uff0c\u907f\u514d\u5168\u91cf\u590d\u5236\uff1b<\/li>\n\n\n\n<li>\u4f18\u52bf\uff1a\u6bd4COPY\u66f4\u5feb\u3001\u66f4\u7701\u7a7a\u95f4\uff0c\u90e8\u5206\u573a\u666f\u652f\u6301\u5728\u7ebf\u64cd\u4f5c\uff1b<\/li>\n\n\n\n<li>\u52a3\u52bf\uff1a\u5e76\u975e\u6240\u6709DDL\u90fd\u652f\u6301\uff0c\u53ef\u80fd\u81ea\u52a8\u964d\u7ea7\u4e3aCOPY\u6a21\u5f0f\uff0c\u5b58\u5728\u9501\u7ade\u4e89\u98ce\u9669\u3002<\/li>\n<\/ul>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>INSTANT\uff08\u5373\u65f6\uff09<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8fc7\u7a0b\uff1a\u4ec5\u66f4\u65b0\u5185\u5b58\u5143\u6570\u636e\uff0c\u4e0d\u4fee\u6539\u78c1\u76d8\u6570\u636e\u683c\u5f0f\uff1b<\/li>\n\n\n\n<li>\u4f18\u52bf\uff1a\u51e0\u4e4e\u77ac\u65f6\u5b8c\u6210\uff0c\u5bf9\u5e94\u7528\u5f71\u54cd\u6781\u5c0f\uff1b<\/li>\n\n\n\n<li>\u52a3\u52bf\uff1a\u6709\u7ea6\u675f\uff08\u5982\u4e0d\u652f\u6301\u65b0\u589e\u5217\u8bbe\u9ed8\u8ba4\u503c\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u62938ec2\"><strong>\u9009\u62e9\u5efa\u8bae<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8ffd\u6c42\u901f\u5ea6\uff1a\u4f18\u5148INSTANT\uff1b<\/li>\n\n\n\n<li>\u5927\u89c4\u6a21\u6570\u636e\u96c6\u4e14\u9700\u51cf\u5c11\u505c\u673a\uff1a\u9009INPLACE\uff1b<\/li>\n\n\n\n<li>\u5c0f\u578b\u6570\u636e\u5e93\u6216\u7b80\u5355\u573a\u666f\uff1a\u9009COPY\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"bMlT4\">6.3 \u5feb\u901f\u52a0\u5217\u7684\u6ce8\u610f\u4e8b\u9879<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4ec5\u652f\u6301\u5728\u8868\u5c3e\u6dfb\u52a0\u65b0\u5217\uff1b<\/li>\n\n\n\n<li>\u9700MySQL 8.0.12\u53ca\u4ee5\u4e0a\u7248\u672c\uff1b<\/li>\n\n\n\n<li>ALGORITHM=INSTANT \u4e0d\u652f\u6301 DROP COLUMN \u64cd\u4f5c\uff0c\u8be5\u64cd\u4f5c\u4ecd\u9700\u8981\u91cd\u5efa\u8868\u3002\uff08\u4f1a\u62a5\u9519\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"axCxW\">6.4 \u5b9e\u9a8c\uff1a\u4e09\u79cd\u52a0\u5217\u7b97\u6cd5\u5bf9\u6bd4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ueca6d22b\"><strong>\u6b65\u9aa41\uff1a\u521b\u5efa\u6d4b\u8bd5\u8868<\/strong><\/p>\n\n\n\n<pre id=\"mFn69\" class=\"wp-block-code\"><code>CREATE TABLE test (    \n  id INT NOT NULL AUTO_INCREMENT,    \n  name VARCHAR(50) NOT NULL,    \n  age INT NOT NULL,    \n  PRIMARY KEY (id) \n);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u238c4e82\"><strong>\u6b65\u9aa42\uff1a\u63d2\u5165\u6d4b\u8bd5\u6570\u636e<\/strong><\/p>\n\n\n\n<pre id=\"pa6De\" class=\"wp-block-code\"><code>INSERT INTO test (name, age) VALUES ('\u5c0f\u660e', 20); \nINSERT INTO test (name, age) VALUES ('\u5c0f\u7ea2', 22); \n-- \u5faa\u73af\u63d2\u5165\u4ee5\u6269\u5927\u6570\u636e\u91cf\ninsert into test(name, age) select name, age from test; \n......<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u9ddb9acf\"><strong>\u6b65\u9aa43\uff1a\u5bf9\u6bd4\u52a0\u5217\u8017\u65f6<\/strong><\/p>\n\n\n\n<pre id=\"KlQ6G\" class=\"wp-block-code\"><code>alter table test add column a varchar(10),algorithm=copy; \nalter table test add column b varchar(10),algorithm=inplace; \nalter table test add column c varchar(10),algorithm=instant;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u23cb36ee\">\u7ed3\u679c\u663e\u793aINSTANT\u7b97\u6cd5\u8017\u65f6\u663e\u8457\u4f4e\u4e8e\u5176\u4ed6\u4e24\u79cd\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u7b3f849b\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"695\" height=\"237\" src=\"http:\/\/47.100.165.17\/wordpress\/wp-content\/uploads\/2026\/02\/image-6.png\" alt=\"\" class=\"wp-image-232\" srcset=\"https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/02\/image-6.png 695w, https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/02\/image-6-300x102.webp 300w\" sizes=\"(max-width: 695px) 100vw, 695px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u7b3f849b\"><br><strong>\u6b65\u9aa44\uff1a\u9a8c\u8bc1\u5220\u9664\u64cd\u4f5c\u9650\u5236<\/strong><\/p>\n\n\n\n<pre id=\"yDX7P\" class=\"wp-block-code\"><code>alter table test drop column b,algorithm=instant;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u5dd89d7d\">\u6267\u884c\u4f1a\u62a5\u9519\uff0c\uff08INSTANT\u4e0d\u652f\u6301\u5220\u9664\u5b57\u6bb5\uff09<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"http:\/\/47.100.165.17\/wordpress\/wp-content\/uploads\/2026\/02\/image-7.png\" alt=\"\" class=\"wp-image-233\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u6c61139c\"><strong>\u6b65\u9aa44\uff1a\u9a8c\u8bc1\u6df7\u5408\u64cd\u4f5c\u9650\u5236<\/strong><\/p>\n\n\n\n<pre id=\"ob7ZH\" class=\"wp-block-code\"><code>alter table test add column d varchar(10),drop column c,algorithm=instant;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ue6fd8f22\">\u6267\u884c\u4f1a\u62a5\u9519\uff08INSTANT\u4e0d\u652f\u6301\u540c\u65f6\u589e\u5220\u5b57\u6bb5\uff09\u3002<\/p>\n\n\n\n<pre id=\"BQ84J\" class=\"wp-block-code\"><code>alter table test add column d varchar(10),drop column c,algorithm=inplace;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ue886c92a\">\u6267\u884c\u6210\u529f\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"983\" height=\"160\" src=\"http:\/\/47.100.165.17\/wordpress\/wp-content\/uploads\/2026\/02\/image-8.png\" alt=\"\" class=\"wp-image-234\" srcset=\"https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/02\/image-8.png 983w, https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/02\/image-8-300x49.webp 300w, https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/02\/image-8-768x125.webp 768w\" sizes=\"(max-width: 983px) 100vw, 983px\" \/><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"kTjGa\">7 MySQL 8.0\u65b0\u7279\u6027-\u4e0d\u53ef\u89c1\u7d22\u5f15<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"lAxms\">7.1 \u4e0d\u53ef\u89c1\u7d22\u5f15\u7684\u4f5c\u7528<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u51cf\u5c11\u7d22\u5f15\u5bf9\u5199\u5165\u64cd\u4f5c\u7684\u6027\u80fd\u635f\u8017\uff08\u9690\u85cf\u540e\u4e0d\u53c2\u4e0e\u5199\u5165\u7ef4\u62a4\uff09\uff1b<\/li>\n\n\n\n<li>\u4fbf\u4e8e\u8c03\u8bd5SQL\uff08\u9a8c\u8bc1\u7d22\u5f15\u662f\u5426\u5fc5\u8981\uff09\uff1b<\/li>\n\n\n\n<li>\u7b80\u5316\u7d22\u5f15\u7ba1\u7406\uff08\u65e0\u9700\u5220\u9664\u5373\u53ef\u4e34\u65f6\u7981\u7528\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"siPDQ\">7.2 \u4e0d\u53ef\u89c1\u7d22\u5f15\u7684\u4f7f\u7528<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5efa\u8868\u65f6\u5b9a\u4e49\u4e0d\u53ef\u89c1\u7d22\u5f15<\/strong><\/li>\n<\/ol>\n\n\n\n<pre id=\"AORXZ\" class=\"wp-block-code\"><code>create table invisible_test(\n  id int not null auto_increment primary key,\n  a int,\n  b int,\n  key idx_a(a) invisible  -- \u5b9a\u4e49\u4e0d\u53ef\u89c1\u7d22\u5f15\n);<\/code><\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u4fee\u6539\u7d22\u5f15\u53ef\u89c1\u6027<\/strong><\/li>\n<\/ol>\n\n\n\n<pre id=\"u2NmH\" class=\"wp-block-code\"><code>-- \u5207\u6362\u4e3a\u53ef\u89c1\nalter table invisible_test alter index idx_a visible;\n\n-- \u5207\u6362\u4e3a\u4e0d\u53ef\u89c1\nalter table invisible_test alter index idx_a invisible;<\/code><\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u67e5\u770b\u7d22\u5f15\u53ef\u89c1\u6027<\/strong><\/li>\n<\/ol>\n\n\n\n<pre id=\"DGNF8\" class=\"wp-block-code\"><code>-- \u65b9\u5f0f1\uff1a\u67e5\u770b\u8868\u7ed3\u6784\nshow create table invisible_test;\n\n-- \u65b9\u5f0f2\uff1a\u67e5\u770b\u7d22\u5f15\u8be6\u60c5\nshow index from invisible_test\\G<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"http:\/\/47.100.165.17\/wordpress\/wp-content\/uploads\/2026\/02\/image-9.png\" alt=\"\" class=\"wp-image-235\"\/><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"M45ga\">8 MySQL\u7248\u672c\u9009\u62e9\u5efa\u8bae<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u517c\u5bb9\u6027<\/strong>\uff1a\u4f18\u5148\u5339\u914d\u5e94\u7528\u7a0b\u5e8f\u7684\u7248\u672c\u652f\u6301\u8303\u56f4\uff1b<\/li>\n\n\n\n<li><strong>\u5b89\u5168\u6027<\/strong>\uff1a\u9009\u62e9\u5305\u542b\u6700\u65b0\u5b89\u5168\u8865\u4e01\u7684\u7248\u672c\uff0c\u89c4\u907f\u5df2\u77e5\u6f0f\u6d1e\uff08\u59822022\u5e74\u56e0\u91cd\u5927Bug\u88ab\u4e0b\u67b6\u7684MySQL 8.0.29\uff09\uff1b<\/li>\n\n\n\n<li><strong>\u6027\u80fd<\/strong>\uff1a\u6839\u636e\u4e1a\u52a1\u8d1f\u8f7d\u9009\u62e9\uff08\u4f8b\u5982MySQL 8.0\u76f8\u6bd45.5\u6027\u80fd\u63d0\u5347\u663e\u8457\uff09\uff1b<\/li>\n\n\n\n<li><strong>\u529f\u80fd\u9700\u6c42<\/strong>\uff1a\u9700\u4f7f\u7528\u65b0\u7279\u6027\uff08\u5982JSON\u652f\u6301\u3001\u5feb\u901f\u52a0\u5217\uff09\u65f6\uff0c\u9009\u62e9\u5bf9\u5e94\u7248\u672c\uff1b<\/li>\n\n\n\n<li><strong>\u5b98\u65b9\u652f\u6301<\/strong>\uff1a\u907f\u514d\u9009\u7528\u5df2\u505c\u6b62\u66f4\u65b0\u6216\u7ef4\u62a4\u7684\u7248\u672c\uff08\u5982\u8d85\u671f\u7684\u65e7\u7248\u672c\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"oGKjm\">9 MySQL 8.4\u7684\u65b0\u7279\u6027<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"pHzz1\">9.1 \u7cfb\u7edf\u53d8\u91cf\u9ed8\u8ba4\u503c\u53d8\u66f4<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><tbody><tr><td>\u53c2\u6570<\/td><td>\u53c2\u6570\u4f5c\u7528<\/td><td>\u9ed8\u8ba4\u503c\u53d8\u5316<\/td><\/tr><tr><td><code>innodb_io_capacity<\/code><\/td><td>\u63a7\u5236\u6bcf\u79d2\u53ef\u7528\u4e8e InnoDB \u540e\u53f0\u4efb\u52a1\u7684 I\/O \u6570<\/td><td>\u9ed8\u8ba4\u503c\u6539\u6210\u4e8610000\uff0c\u4e4b\u524d\u662f200<\/td><\/tr><tr><td><code>innodb_buffer_pool_instances<\/code><\/td><td>InnoDB\u7f13\u51b2\u6c60\u7684\u533a\u57df\u6570<\/td><td>\u4e4b\u524d\u9ed8\u8ba4\u503c\u662f8\uff0c\u5982\u679c<code>innodb_buffer_pool_size<\/code>&lt;= 1G\uff0c\u5219\u4e3a1\u3002<br>\u4ece8.4\u5f00\u59cb\uff0c\u5982\u679c<code>innodb_buffer_pool_size<\/code>&lt;= 1G\uff0c\u5219\u4e3a1\uff1b\u5982\u679c<code>innodb_buffer_pool_size<\/code>&gt;1G\uff0c\u5219\u662f\u5728\u4e0b\u9762\u4e24\u4e2a\u8ba1\u7b97\u4e2d\u9009\u4e00\u4e2a\u6700\u5c0f\u503c\uff1a<code>innodb_buffer_pool_size<\/code> \/ <code>innodb_buffer_pool_chunk_size<\/code>\u8fd9\u4e2a\u7ed3\u679c\u76841\/2\uff1b\u53ef\u7528\u903b\u8f91CPU\u6570\u91cf\u76841\/4<\/td><\/tr><tr><td><code>innodb_change_buffering<\/code><\/td><td>\u51b3\u5b9a\u54ea\u4e9b\u64cd\u4f5c\u4f1a\u4f7f\u7528change buffer<\/td><td>\u4e4b\u524d\u7684\u7248\u672c\u9ed8\u8ba4\u503c\u662fall\uff0c\u8868\u793a<code>innodb_change_buffering<\/code>\u4f1a\u7f13\u5b58\u63d2\u5165\u3001\u5220\u9664\u6807\u8bb0\u64cd\u4f5c\u548c\u540e\u53f0\u53d1\u751f\u7684\u7269\u7406\u5220\u9664\u64cd\u4f5c\uff1b\u4ece8.4\u5f00\u59cb\uff0c\u9ed8\u8ba4\u662fnone\uff0c\u8868\u793a\u4e0d\u7f13\u5b58\u8fd9\u4e9b\u4fee\u6539\u64cd\u4f5c<\/td><\/tr><tr><td><code>group_replication_consistency<\/code><\/td><td>\u63a7\u5236\u7ec4\u590d\u5236\u7684\u4e00\u81f4\u6027\u7ea7\u522b<\/td><td>\u9ed8\u8ba4\u503c\u6539\u6210\u4e86<code>BEFORE_ON_PRIMARY_FAILOVER<\/code>\uff0c\u4ee5\u524d\u662f<code>EVENTUAL<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"RTpxo\">9.2 MySQL 8.4\u5176\u4ed6\u53d8\u5316<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5bc6\u7801\u8ba4\u8bc1\u8c03\u6574<\/strong>\uff1a\u9ed8\u8ba4\u7981\u7528<code>mysql_native_password<\/code>\u63d2\u4ef6\uff0c\u5982\u9700\u542f\u7528\uff0c\u53ef\u5728\u542f\u52a8\u65f6\u6dfb\u52a0<code>--mysql_native_password=ON<\/code>\u53c2\u6570\u6216\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u8bbe\u7f6e<code>mysql_native_password=ON<\/code>\uff1b<\/li>\n\n\n\n<li><strong>\u514b\u9686\u63d2\u4ef6\u4f18\u5316<\/strong>\uff1a\u653e\u5bbd\u7248\u672c\u9650\u5236\uff0c\u652f\u6301\u540c\u4e00\u4e3b\u7248\u672c\u5185\u4e0d\u540c\u5c0f\u7248\u672c\u95f4\u7684\u514b\u9686\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"k2d87\">10 \u672c\u7ae0\u603b\u7ed3<\/h1>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><tbody><tr><td>\u7248\u672c<\/td><td>\u65b0\u7279\u6027<\/td><td>\u7f3a\u70b9<\/td><\/tr><tr><td>5.5\u7684\u4f18\u7f3a\u70b9<\/td><td>\u534a\u540c\u6b65\u590d\u5236\u3001\u5b9e\u65f6\u7ebf\u7a0b\u3001Buffer Pool\u53ef\u62c6\u5206\u4e3a\u591a\u4e2aInstances\u3001\u5143\u6570\u636e\u9501\u3001\u9ed8\u8ba4\u5b58\u50a8\u5f15\u64ce\u6539\u6210\u4e86InnoDB\u3001\u5b89\u5168\u6027\u6539\u8fdb<\/td><td>\u4e0d\u652f\u6301\u5168\u6587\u641c\u7d22\u3001\u4e0d\u652f\u6301\u5e76\u884c\u590d\u5236\u3001\u5e76\u53d1\u80fd\u529b\u5dee<\/td><\/tr><tr><td>5.6\u7684\u4f18\u7f3a\u70b9<\/td><td>\u652f\u6301GTID\u590d\u5236\u3001\u5143\u6570\u636e\u9501\u7684\u4f18\u5316\u3001\u57fa\u4e8e\u5e93\u7684\u5e76\u884c\u590d\u5236\u3001Undo Log \u53ef\u4ee5\u4fdd\u5b58\u5728\u72ec\u7acb\u8868\u7a7a\u95f4\u4e2d<\/td><td>\u57fa\u4e8e\u5e93\u7684\u5e76\u884c\u590d\u5236\u5728\u5927\u591a\u6570\u573a\u666f\u90fd\u4e0d\u9002\u7528\uff0c\u5f88\u591a\u5168\u5c40\u53c2\u6570\u4e0d\u80fd\u52a8\u6001\u4fee\u6539\uff0c\u4e0d\u652f\u6301JSON\u6570\u636e\u7c7b\u578b<\/td><\/tr><tr><td>5.7\u7684\u4f18\u7f3a\u70b9<\/td><td>\u7ec4\u590d\u5236\u3001\u57fa\u4e8eWRITESET\u7684\u5e76\u884c\u590d\u5236\u3001\u865a\u62df\u5217\u3001\u539f\u751f\u652f\u6301JSON\u7c7b\u578b\u3001\u652f\u6301\u52a8\u6001\u8c03\u6574\u5f88\u591a\u5168\u5c40\u53c2\u6570\u3001\u652f\u6301\u4e34\u65f6\u8868\u8bbe\u7f6e\u4e3aInnoDB\u5b58\u50a8\u5f15\u64ce<\/td><td>\u793e\u533a\u7248\u65e0\u989d\u5916\u7aef\u53e3\u3001\u5927\u8868\u589e\u52a0\u5b57\u6bb5\u5f00\u9500\u5927\u3001\u6240\u6709\u7ebf\u7a0b\u4f18\u5148\u7ea7\u90fd\u4e00\u6837\uff0c\u5e76\u4e14\u90fd\u662f\u5171\u4eab\u7684<\/td><\/tr><tr><td>8.0\u7684\u65b0\u7279\u6027<\/td><td>\u4e8b\u52a1\u6027\u6570\u636e\u5b57\u5178\u3001\u5feb\u901f\u52a0\u5217\u3001\u4e0d\u53ef\u89c1\u7d22\u5f15\u3001\u964d\u5e8f\u7d22\u5f15\u3001\u89d2\u8272\u7ba1\u7406\u3001\u8d44\u6e90\u7ec4\u3001\u6301\u4e45\u5316\u5168\u5c40\u53d8\u91cf\u3001hash join\u3001\u989d\u5916\u7aef\u53e3\u3001\u81ea\u589e\u4e3b\u952e\u7684\u6301\u4e45\u5316<\/td><td><\/td><\/tr><tr><td>8.4\u7684\u4f18\u7f3a\u70b9<\/td><td>\u7cfb\u7edf\u53d8\u91cf\u9ed8\u8ba4\u503c\u4f18\u5316\u3001\u9ed8\u8ba4\u7981\u7528<code>mysql_native_password<\/code>\u63d2\u4ef6\u4ee5\u589e\u5f3a\u5b89\u5168\u6027\u3001\u514b\u9686\u63d2\u4ef6\u652f\u6301\u540c\u4e00\u4e3b\u7248\u672c\u5185\u4e0d\u540c\u5c0f\u7248\u672c\u95f4\u7684\u64cd\u4f5c\u3001\u6027\u80fd\u4e0e\u7a33\u5b9a\u6027\u8fdb\u4e00\u6b65\u63d0\u5347<\/td><td><\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>1 MySQL 5.5\u7248\u672c\u7684\u4f18\u7f3a\u70b9 1.1 MySQL 5.5\u5f15\u5165\u7684\u65b0\u529f\u80fd 1.2 MySQL 5.5\u7684\u7f3a\u70b9 <\/p>\n<div class=\"more-link\">\n\t\t\t\t <a href=\"https:\/\/yunyanglib.cn\/?p=223\" class=\"link-btn theme-btn\"><span>Read More <\/span> <i class=\"fa fa-caret-right\"><\/i><\/a>\n\t\t\t<\/div>\n","protected":false},"author":1,"featured_media":224,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[16],"class_list":["post-223","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mysql","tag-mysql"],"_links":{"self":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/223","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=223"}],"version-history":[{"count":4,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/223\/revisions"}],"predecessor-version":[{"id":897,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/223\/revisions\/897"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/media\/224"}],"wp:attachment":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=223"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}