{"id":31144,"date":"2025-04-21T09:03:19","date_gmt":"2025-04-21T01:03:19","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/31144.html"},"modified":"2025-04-21T09:03:19","modified_gmt":"2025-04-21T01:03:19","slug":"mysql%e5%8e%9f%e7%90%86%ef%bc%9a%e9%80%bb%e8%be%91%e6%9e%b6%e6%9e%84","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/31144.html","title":{"rendered":"MySQL\u539f\u7406\uff1a\u903b\u8f91\u67b6\u6784"},"content":{"rendered":"<p id=\"u179ab6f7\">\u76ee\u7684&#xff1a;\u4e86\u89e3 SQL\u6267\u884c\u6d41\u7a0b \u4ee5\u53ca MySQL \u5185\u90e8\u67b6\u6784&#xff0c;\u6bcf\u4e2a\u96f6\u4ef6\u5177\u4f53\u8d1f\u8d23\u505a\u4ec0\u4e48<\/p>\n<ul>\n<li id=\"u79fd2d0f\">\u7406\u89e3\u6574\u4f53\u67b6\u6784<\/li>\n<li id=\"u1da507ab\">\u5206\u522b\u6709\u4ec0\u4e48\u6a21\u5757<\/li>\n<li id=\"u050d6aa5\">\u6bcf\u4e2a\u6a21\u5757\u5177\u4f53\u505a\u4ec0\u4e48<\/li>\n<\/ul>\n<p id=\"main-toc\">\u76ee\u5f55<\/p>\n<p id=\"-toc\" style=\"margin-left:40px\">\n<p id=\"h4GBp-toc\" style=\"margin-left:40px\">1 \u670d\u52a1\u5668\u5904\u7406\u5ba2\u6237\u7aef\u8bf7\u6c42<\/p>\n<p id=\"KH44B-toc\" style=\"margin-left:80px\">1.1 MySQL \u670d\u52a1\u5668\u7aef\u903b\u8f91\u67b6\u6784\u8bf4\u660e<\/p>\n<p id=\"bmxII-toc\" style=\"margin-left:40px\">2 Connectors<\/p>\n<p id=\"pPjhZ-toc\" style=\"margin-left:40px\">3 \u7b2c\u4e00\u5c42&#xff1a;\u8fde\u63a5\u5c42<\/p>\n<p id=\"AWk8H-toc\" style=\"margin-left:80px\">3.1 \u6570\u636e\u5e93\u8fde\u63a5\u6c60(Connection Pool)<\/p>\n<p id=\"tOEPz-toc\" style=\"margin-left:40px\">4 \u7b2c\u4e8c\u5c42&#xff1a;\u670d\u52a1\u5c42<\/p>\n<p id=\"Bjb7X-toc\" style=\"margin-left:40px\">5 \u7b2c\u4e09\u5c42&#xff1a;\u5b58\u50a8\u5f15\u64ce\u5c42<\/p>\n<p id=\"QflPN-toc\" style=\"margin-left:40px\">6 \u5b58\u50a8\u5c42 \u2014 \u6587\u4ef6\u7cfb\u7edf&#xff08;\u4e0d\u5c5e\u4e8e MySQL \u67b6\u6784&#xff09;<\/p>\n<p id=\"gusrZ-toc\" style=\"margin-left:80px\">6.1 \u65e5\u5fd7\u6a21\u5757<\/p>\n<p id=\"NlSW6-toc\" style=\"margin-left:80px\">6.2 \u6570\u636e\u6a21\u5757&#xff08;\u6570\u636e\u7684\u6587\u4ef6\u5b58\u50a8\u683c\u5f0f&#xff09;<\/p>\n<p id=\"d4ncG-toc\" style=\"margin-left:40px\">1.7 \u67b6\u6784\u603b\u7ed3<\/p>\n<p id=\"lswPu-toc\" style=\"margin-left:40px\">\u5de9\u56fa\u77e5\u8bc6<\/p>\n<hr id=\"hr-toc\" \/>\n<h3 id=\"h4GBp\">1 \u670d\u52a1\u5668\u5904\u7406\u5ba2\u6237\u7aef\u8bf7\u6c42<\/h3>\n<h4 id=\"KH44B\">1.1 MySQL \u670d\u52a1\u5668\u7aef\u903b\u8f91\u67b6\u6784\u8bf4\u660e<\/h4>\n<p id=\"u6367002e\">\n<p class=\"img-center\"><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"799\" id=\"u0cbd0c36\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250421010317-6805995508643.png\" width=\"1048\" \/><\/p>\n<h3 id=\"bmxII\">2 Connectors<\/h3>\n<p id=\"u452e1dc0\">Connectors&#xff0c;\u6307\u7684\u662f\u4e0d\u540c\u8bed\u8a00\u4e2d\u4e0eSQL\u7684\u4ea4\u4e92\u3002MySQL\u9996\u5148\u662f\u4e00\u4e2a\u7f51\u7edc\u7a0b\u5e8f&#xff0c;\u5728TCP\u4e4b\u4e0a\u5b9a\u4e49\u4e86\u81ea\u5df1\u7684\u5e94\u7528\u5c42\u534f\u8bae\u3002\u6240\u4ee5\u8981\u4f7f\u7528MYSQL&#xff0c;\u6211\u4eec\u53ef\u4ee5\u7f16\u5199\u4ee3\u7801&#xff0c;\u8ddfMySQLServer\u5efa\u7acbTCP\u8fde\u63a5&#xff0c;\u4e4b\u540e\u6309\u7167\u5176\u5b9a\u4e49\u597d\u7684\u534f\u8bae\u8fdb\u884c\u4ea4\u4e92\u6216\u8005\u6bd4\u8f83\u65b9\u4fbf\u7684\u529e\u6cd5\u662f\u8c03\u7528SDK&#xff0c;\u6bd4\u5982NativeCAP1JDBC\u3001PHP\u7b49\u5404\u8bed\u8a00MySQL Connector&#xff0c;\u6216\u8005\u901a\u8fc7ODBC\u3002\u4f46\u901a\u8fc7SDK\u6765\u8bbf\u95eeMySQL&#xff0c;\u672c\u8d28\u4e0a\u8fd8\u662f\u5728TCP\u8fde\u63a5\u4e0a\u901a\u8fc7MySQL\u534f\u8bae\u8ddfMySQL\u8fdb\u884c\u4ea4\u4e92\u3002<\/p>\n<hr id=\"QDxag\" \/>\n<p id=\"ud01e75b5\">MySQL Server\u7ed3\u6784\u53ef\u4ee5\u5206\u4e3a\u5982\u4e0b\u7684\u4e09\u5c42&#xff1a;\u8fde\u63a5\u5c42\/\u670d\u52a1\u5c42\/\u5f15\u64ce\u5c42<\/p>\n<p id=\"ub74e571f\">\u4e0d\u5305\u62ec\u7269\u7406\u78c1\u76d8\u4e0a\u6587\u4ef6\/\u4e5f\u4e0d\u5305\u62ec\u6587\u4ef6\u7cfb\u7edf<\/p>\n<p id=\"ued98fa64\">\n<p class=\"img-center\"><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"799\" id=\"udf7b088b\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250421010317-68059955ad762.png\" width=\"1048\" \/><\/p>\n<hr id=\"LD6Wx\" \/>\n<h3 id=\"pPjhZ\">3 \u7b2c\u4e00\u5c42&#xff1a;\u8fde\u63a5\u5c42<\/h3>\n<p id=\"ub2764b2e\">\u529f\u80fd&#xff1a;\u5efa\u7acb TCP \u8fde\u63a5<\/p>\n<p id=\"ue0fb8e6d\">\u7ecf\u8fc7\u4e09\u6b21\u63e1\u624b\u5efa\u7acb\u8fde\u63a5\u6210\u529f\u540e&#xff0c;MySQL\u670d\u52a1\u5668\u5bf9TCP \u4f20\u8f93\u8fc7\u6765\u7684\u8d26\u53f7\u5bc6\u7801\u505a\u8eab\u4efd\u8ba4\u8bc1&amp;\u6743\u9650\u83b7\u53d6\u3002<\/p>\n<ul>\n<li id=\"u0f2bdadb\">\u7528\u6237\u540d\u6216\u5bc6\u7801\u4e0d\u5bf9&#xff0c;\u4f1a\u6536\u5230\u4e00\u4e2aAccess denied for user\u9519\u8bef&#xff0c;\u5ba2\u6237\u7aef\u7a0b\u5e8f\u7ed3\u675f\u6267\u884c<\/li>\n<li id=\"uec287f51\">\u7528\u6237\u540d\u5bc6\u7801\u8ba4\u8bc1\u901a\u8fc7&#xff0c;\u4f1a\u4ece\u6743\u9650\u8868\u67e5\u51fa\u8d26\u53f7\u62e5\u6709\u7684\u6743\u9650\u4e0e\u8fde\u63a5\u5173\u8054&#xff0c;\u4e4b\u540e\u7684\u6743\u9650\u5224\u65ad\u903b\u8f91&#xff0c;\u90fd\u5c06\u4f9d\u8d56\u4e8e\u6b64\u65f6\u8bfb\u5230\u7684\u6743\u9650<\/li>\n<\/ul>\n<h4 id=\"AWk8H\">3.1 \u6570\u636e\u5e93\u8fde\u63a5\u6c60(Connection Pool)<\/h4>\n<p id=\"u149774c0\">\u4e00\u4e2a\u7cfb\u7edf\u53ea\u4f1a\u548cMySQL\u670d\u52a1\u5668\u5efa\u7acb\u4e00\u4e2a\u8fde\u63a5\u5417?\u53ea\u80fd\u6709\u4e00\u4e2a\u7cfb\u7edf\u548cMySQL\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u5417?<\/p>\n<p id=\"ua51dc0d7\">\u5f53\u7136\u4e0d\u662f&#xff0c;\u591a\u4e2a\u7cfb\u7edf\u90fd\u53ef\u4ee5\u548cMySQL\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5&#xff0c;\u6bcf\u4e2a\u7cfb\u7edf\u5efa\u7acb\u7684\u8fde\u63a5\u80af\u5b9a\u4e0d\u6b62\u4e00\u4e2a\u3002<\/p>\n<p id=\"uaf7d5398\">\u4e3a\u4e86\u89e3\u51b3TCP\u65e0\u9650\u521b\u5efa\u4e0eTCP\u9891\u7e41\u521b\u5efa\u9500\u6bc1\u5e26\u6765\u7684\u8d44\u6e90\u8017\u5c3d\u3001\u6027\u80fd\u4e0b\u964d\u95ee\u9898\u3002MySQL\u670d\u52a1\u5668\u91cc\u6709\u4e13\u95e8\u7684TCP\u8fde\u63a5\u6c60 \u9650\u5236\u8fde\u63a5\u6570\u3002\u91c7\u7528 \u957f\u8fde\u63a5\u6a21\u5f0f \u590d\u7528TCP\u8fde\u63a5&#xff0c;\u6765\u89e3\u51b3\u4e0a\u8ff0\u95ee\u9898\u3002<\/p>\n<p id=\"u0fe3a838\">TCP \u8fde\u63a5\u6536\u5230\u8bf7\u6c42\u540e&#xff0c;\u5fc5\u987b\u8981\u5206\u914d\u7ed9\u4e00\u4e2a\u7ebf\u7a0b\u4e13\u95e8\u4e0e\u8fd9\u4e2a\u5ba2\u6237\u7aef\u7684\u4ea4\u4e92\u3002\u6240\u4ee5\u8fd8\u4f1a\u6709\u4e2a\u7ebf\u7a0b\u6c60&#xff0c;\u53bb\u8d70\u540e\u9762\u7684\u6d41\u7a0b&#xff0c;\u6bcf\u4e00\u4e2a\u8fde\u63a5\u4ece\u7ebf\u7a0b\u6c60\u4e2d\u83b7\u53d6\u7ebf\u7a0b&#xff0c;\u7701\u53bb\u4e86\u521b\u5efa\u548c\u9500\u6bc1\u7ebf\u7a0b\u7684\u5f00\u9500\u3002<\/p>\n<p id=\"ue1861128\">\u8fde\u63a5\u6c60\u7684\u6700\u5927\u7ebf\u7a0b\u6570\u53ef\u4ee5\u901a\u8fc7\u53c2\u6570max-connections\u6765\u63a7\u5236&#xff0c;\u5982\u679c\u5230\u6765\u7684\u5ba2\u6237\u7aef\u8fde\u63a5\u8d85\u51fa\u8be5\u503c\u65f6&#xff0c;\u65b0\u5230\u6765\u7684\u8fde\u63a5\u90fd\u4f1a\u88ab\u62d2\u7edd&#xff0c;\u5173\u4e8e\u6700\u5927\u8fde\u63a5\u6570\u7684\u4e00\u4e9b\u547d\u4ee4\u4e3b\u8981\u6709\u4e24\u6761&#xff1a;<\/p>\n<ul>\n<li id=\"u02aef721\">show variables like &#039;%max_connections%&#039;;&#xff1a;\u67e5\u8be2\u76ee\u524dDB\u7684\u6700\u5927\u8fde\u63a5\u6570\u3002<\/li>\n<li id=\"u3ef40542\">set GLOBAL max_connections &#061; 200;&#xff1a;\u4fee\u6539\u6570\u636e\u5e93\u7684\u6700\u5927\u8fde\u63a5\u6570\u4e3a\u6307\u5b9a\u503c\u3002<\/li>\n<\/ul>\n<p id=\"u6bd33765\">\u5bf9\u4e8e\u4e0d\u540c\u7684\u673a\u5668\u914d\u7f6e&#xff0c;\u53ef\u4ee5\u9002\u5f53\u7684\u8c03\u6574\u8fde\u63a5\u6c60\u7684\u6700\u5927\u8fde\u63a5\u6570\u5927\u5c0f&#xff0c;\u4ee5\u6b64\u53ef\u4ee5\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u63d0\u5347\u6570\u636e\u5e93\u7684\u6027\u80fd\u3002\u9664\u4e86\u53ef\u4ee5\u67e5\u8be2\u6700\u5927\u8fde\u63a5\u6570\u5916&#xff0c;MySQL\u672c\u8eab\u8fd8\u4f1a\u5bf9\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u6570\u8fdb\u884c\u7edf\u8ba1&#xff0c;\u5bf9\u4e8e\u8fd9\u70b9\u53ef\u4ee5\u901a\u8fc7\u547d\u4ee4show status like &#034;Threads%&#034;;\u67e5\u8be2&#xff1a;<\/p>\n<p id=\"uff9b1cb5\"><span style=\"color:#fe2c24\">\u6240\u4ee5\u8fde\u63a5\u7ba1\u7406\u7684\u804c\u8d23\u662f\u8d1f\u8d23\u8ba4\u8bc1\u3001\u7ba1\u7406\u8fde\u63a5\u3001\u83b7\u53d6\u6743\u9650\u4fe1\u606f\u3002<\/span><\/p>\n<h3 id=\"tOEPz\">4 \u7b2c\u4e8c\u5c42&#xff1a;\u670d\u52a1\u5c42<\/h3>\n<p id=\"ua7e4a072\">\u7b2c\u4e8c\u5c42\u67b6\u6784\u4e3b\u8981\u5b8c\u6210\u5927\u591a\u6570\u7684\u6838\u5fc3\u670d\u52a1\u529f\u80fd&#xff0c;\u5982SQL\u63a5\u53e3&#xff0c;\u5e76\u5b8c\u6210 \u7f13\u5b58\u7684\u67e5\u8be2 &#xff0c;SQL\u7684 \u5206\u6790\u548c\u4f18\u5316 \u53ca\u90e8\u5206 \u5185\u7f6e\u51fd\u6570\u7684\u6267\u884c \u3002\u6240\u6709 \u8de8\u5b58\u50a8\u5f15\u64ce\u7684\u529f\u80fd \u4e5f\u5728\u8fd9\u4e00\u5c42\u5b9e\u73b0&#xff0c;\u5982\u8fc7\u7a0b\u3001\u51fd\u6570\u7b49\u3002<\/p>\n<p id=\"u3243696a\">\u5728\u8be5\u5c42&#xff0c;\u670d\u52a1\u5668\u4f1a \u89e3\u6790\u67e5\u8be2 \u5e76\u521b\u5efa\u76f8\u5e94\u7684\u5185\u90e8 \u89e3\u6790\u6811 &#xff0c;\u5e76\u5bf9\u5176\u5b8c\u6210\u76f8\u5e94\u7684 \u4f18\u5316 :\u5982\u786e\u5b9a\u67e5\u8be2\u8868\u7684\u987a\u5e8f&#xff0c;\u662f\u5426\u5229\u7528\u7d22\u5f15\u7b49&#xff0c;\u6700\u540e\u751f\u6210\u76f8\u5e94\u7684\u6267\u884c\u64cd\u4f5c\u3002<\/p>\n<p id=\"ud9efa2fd\">\u5982\u679c\u662fSELECT\u8bed\u53e5&#xff0c;\u670d\u52a1\u5668\u8fd8\u4f1a \u67e5\u8be2\u5185\u90e8\u7684\u7f13\u5b58 \u3002\u5982\u679c\u7f13\u5b58\u7a7a\u95f4\u8db3\u591f\u5927&#xff0c;\u8fd9\u6837\u5728\u89e3\u51b3\u5927\u91cf\u8bfb\u64cd\u4f5c\u7684\u73af\u5883\u4e2d\u80fd\u591f\u5f88\u597d\u7684\u63d0\u5347\u7cfb\u7edf\u7684\u6027\u80fd\u3002<\/p>\n<ul>\n<li id=\"u18b31d2f\">SQL Interface&#xff1a;SQL \u63a5\u53e3<\/li>\n<\/ul>\n<ul>\n<li>\n<ul>\n<li id=\"u1ea886ff\">\u63a5\u6536\u7528\u6237\u7684SQL\u547d\u4ee4&#xff0c;\u5e76\u4e14\u8fd4\u56de\u7528\u6237\u9700\u8981\u67e5\u8be2\u7684\u7ed3\u679c\u3002\u6bd4\u5982SELECT.FROM\u5c31\u662f\u8c03\u7528SQLInterface\u3002<\/li>\n<li id=\"ue41c638f\">MySQL\u652f\u6301DML(\u6570\u636e\u64cd\u4f5c\u8bed\u8a00)\u3001DDL(\u6570\u636e\u5b9a\u4e49\u8bed\u8a00)\u3001\u5b58\u50a8\u8fc7\u7a0b\u3001\u89c6\u56fe\u3001\u89e6\u53d1\u5668\u3001\u81ea\u5b9a\u4e49\u51fd\u6570\u7b49\u591a\u79cdSQL\u8bed\u8a00\u63a5\u53e3<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<ul>\n<li id=\"u78e46a42\">Parser&#xff1a;\u89e3\u6790\u5668<\/li>\n<\/ul>\n<ul>\n<li>\n<ul>\n<li id=\"uc2b1d65e\">\u5728\u89e3\u6790\u5668\u4e2d\u5bf9 SQL \u8bed\u53e5\u8fdb\u884c\u8bed\u6cd5\u5206\u6790\u3001\u8bed\u4e49\u5206\u6790\u3002\u5c06SQL\u8bed\u53e5\u5206\u89e3\u6210\u6570\u636e\u7ed3\u6784&#xff0c;\u5e76\u5c06\u8fd9\u4e2a\u7ed3\u6784\u4f20\u9012\u5230\u540e\u7eed\u6b65\u9aa4&#xff0c;\u4ee5\u540eSQL\u8bed\u53e5\u7684\u4f20\u9012\u548c\u5904\u7406\u5c31\u662f\u57fa\u4e8e\u8fd9\u4e2a\u7ed3\u6784\u7684&#xff0c;\u5982\u679c\u5728\u5206\u89e3\u6784\u6210\u4e2d\u9047\u5230\u9519\u8bef&#xff0c;\u90a3\u4e48\u5c31\u8bf4\u660e\u8fd9\u4e2aSQL\u8bed\u53e5\u662f\u4e0d\u5408\u7406\u7684\u3002<\/li>\n<li id=\"u10e5adf9\">\u5728SQL\u547d\u4ee4\u4f20\u9012\u5230\u89e3\u6790\u5668\u7684\u65f6\u5019\u4f1a\u88ab\u89e3\u6790\u5668\u9a8c\u8bc1\u548c\u89e3\u6790&#xff0c;\u5e76\u4e3a\u5176\u521b\u5efa \u8bed\u6cd5\u6811 &#xff0c;\u5e76\u6839\u636e\u6570\u636e\u5b57\u5178\u4e30\u5bcc\u67e5\u8be2\u8bed\u6cd5\u6811&#xff0c;\u4f1a\u9a8c\u8bc1\u8be5\u5ba2\u6237\u662f\u5426\u5177\u6709\u6267\u884c\u8be5\u67e5\u8be2\u7684\u6743\u9650&#xff0c;\u521b\u5efa\u597d\u8bed\u6cd5\u6811\u540e&#xff0c;MySQL\u8fd8\u4f1a\u5bf9SQI\u67e5\u8be2\u8fdb\u884c\u8bed\u6cd5\u4e0a\u7684\u4f18\u5316&#xff0c;\u8fdb\u884c\u67e5\u8be2\u91cd\u5199\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<ul>\n<li id=\"u31826b4c\">Optimizer: \u67e5\u8be2\u4f18\u5316\u5668<\/li>\n<\/ul>\n<ul>\n<li>\n<ul>\n<li id=\"u6277d0bb\">SQL\u8bed\u53e5\u5728\u8bed\u6cd5\u89e3\u6790\u4e4b\u540e\u3001\u67e5\u8be2\u4e4b\u524d\u4f1a\u4f7f\u7528\u67e5\u8be2\u4f18\u5316\u5668\u786e\u5b9a SQL\u8bed\u53e5\u7684\u6267\u884c\u8def\u5f84&#xff0c;\u751f\u6210\u4e00\u4e2a \u6267\u884c\u8ba1\u5212 \u3002<\/li>\n<li id=\"u84f6e7aa\">\u8fd9\u4e2a\u6267\u884c\u8ba1\u5212\u8868\u660e\u5e94\u8be5 \u4f7f\u7528\u54ea\u4e9b\u7d22\u5f15 \u8fdb\u884c\u67e5\u8be2(\u5168\u8868\u68c0\u7d22\u8fd8\u662f\u4f7f\u7528\u7d22\u5f15\u68c0\u7d22)&#xff0c;\u8868\u4e4b\u95f4\u7684\u8fde\u63a5\u987a\u5e8f\u5982\u4f55\u6700\u540e\u4f1a\u6309\u7167\u6267\u884c\u8ba1\u5212\u4e2d\u7684\u6b65\u9aa4\u8c03\u7528\u5b58\u50a8\u5f15\u64ce\u63d0\u4f9b\u7684\u65b9\u6cd5\u6765\u771f\u6b63\u7684\u6267\u884c\u67e5\u8be2&#xff0c;\u5e76\u5c06\u67e5\u8be2\u7ed3\u679c\u8fd4\u56de\u7ed9\u7528\u6237\u3002<\/li>\n<li id=\"uf2629f86\">\u5b83\u4f7f\u7528\u201c\u9009\u53d6-\u6295\u5f71-\u8fde\u63a5\u201d\u7b56\u7565\u8fdb\u884c\u67e5\u8be2\u3002\u4f8b\u5982:<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>SELECT id,name FROM student WHERE gender &#061;&#039;\u5973&#039;; <\/p>\n<p id=\"u1f4f76ab\">\u8fd9\u4e2aSELECT\u67e5\u8be2\u5148\u6839\u636eWHERE\u8bed\u53e5\u8fdb\u884c \u9009\u53d6 &#xff0c;\u800c\u4e0d\u662f\u5c06\u8868\u5168\u90e8\u67e5\u8be2\u51fa\u6765\u4ee5\u540e\u518d\u8fdb\u884cgender \u8fc7\u6ee4\u3002<\/p>\n<p id=\"u6f1cae96\">\u8fd9\u4e2aSELECT\u67e5\u8be2\u5148\u6839\u636eid\u548cname\u8fdb\u884c\u5c5e\u6027 \u6295\u5f71 &#xff0c;\u800c\u4e0d\u662f\u5c06\u5c5e\u6027\u5168\u90e8\u53d6\u51fa\u4ee5\u540e\u518d\u8fdb\u884c\u8fc7\u6ee4&#xff0c;\u5c06\u8fd9\u4e24\u4e2a\u67e5\u8be2\u6761\u4ef6 \u8fde\u63a5 \u8d77\u6765\u751f\u6210\u6700\u7ec8\u67e5\u8be2\u7ed3\u679c\u3002<\/p>\n<ul>\n<li id=\"u4b07e41f\">Caches&amp; Buffers: \u67e5\u8be2\u7f13\u5b58\u7ec4\u4ef6<\/li>\n<\/ul>\n<ul>\n<li>\n<ul>\n<li id=\"u00772cc1\">MySQL\u5185\u90e8\u7ef4\u6301\u7740\u4e00\u4e9bcache\u548cBufer&#xff0c;\u6bd4\u5982Query cache\u7528\u6765\u7f13\u5b58\u4e00\u6761SELECT\u8bed\u53e5\u7684\u6267\u884c\u7ed3\u679c&#xff0c;\u5982\u679c\u80fd\u591f\u5728\u5176\u4e2d\u627e\u5230\u5bf9\u5e94\u7684\u67e5\u8be2\u7ed3\u679c&#xff0c;\u90a3\u4e48\u5c31\u4e0d\u5fc5\u518d\u8fdb\u884c\u67fb\u8be2\u89e3\u6790\u3001\u4f18\u5316\u548c\u6267\u884c\u7684\u6574\u4e2a\u8fc7\u7a0b\u4e86&#xff0c;\u76f4\u63a5\u5c06\u7ed3\u679c\u53cd\u9988\u7ed9\u5ba2\u6237\u7aef\u3002<\/li>\n<li id=\"ue47a1fa8\">\u8fd9\u4e2a\u7f13\u5b58\u673a\u5236\u662f\u7531\u4e00\u7cfb\u5217\u5c0f\u7f13\u5b58\u7ec4\u6210\u7684\u3002\u6bd4\u5982\u8868\u7f13\u5b58&#xff0c;\u8bb0\u5f55\u7f13\u5b58&#xff0c;key\u7f13\u5b58&#xff0c;\u6743\u9650\u7f13\u5b58\u7b49\u3002<\/li>\n<li id=\"u1a64dcd1\">\u8fd9\u4e2a\u67e5\u8be2\u7f13\u5b58\u53ef\u4ee5\u5728 \u4e0d\u540c\u5ba2\u6237\u7aef\u4e4b\u95f4\u5171\u4eab \u3002<\/li>\n<li id=\"u5d5106e2\">\u4eceMySQL5.7.20\u5f00\u59cb&#xff0c;\u4e0d\u63a8\u8350\u4f7f\u7528\u67e5\u8be2\u7f13\u5b58&#xff0c;\u5e76\u5728 MySQL8.0 \u4e2d\u5220\u9664 &#xff08;\u547d\u4e2d\u7387\u5f88\u4f4e&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3 id=\"Bjb7X\">5 \u7b2c\u4e09\u5c42&#xff1a;\u5b58\u50a8\u5f15\u64ce\u5c42<\/h3>\n<p id=\"u6370ae44\">\u5b58\u50a8\u5f15\u64ce\u4e5f\u53ef\u4ee5\u7406\u89e3\u6210MySQL\u6700\u91cd\u8981\u7684\u4e00\u5c42&#xff0c;\u5728\u524d\u9762\u7684\u670d\u52a1\u5c42\u4e2d&#xff0c;\u805a\u96c6\u4e86MySQL\u6240\u6709\u7684\u6838\u5fc3\u903b\u8f91\u64cd\u4f5c&#xff0c;\u800c\u5f15\u64ce\u5c42\u5219\u8d1f\u8d23\u5177\u4f53\u7684\u6570\u636e\u64cd\u4f5c\u4ee5\u53ca\u6267\u884c\u5de5\u4f5c\u3002<\/p>\n<p id=\"u1385ef9b\">\u5b58\u50a8\u5f15\u64ce\u662fMySQL\u6570\u636e\u5e93\u4e2d\u4e0e\u78c1\u76d8\u6587\u4ef6\u6253\u4ea4\u9053\u7684\u5b50\u7cfb\u7edf&#xff0c;\u4e0d\u540c\u7684\u5f15\u64ce\u5e95\u5c42\u8bbf\u95ee\u6587\u4ef6\u7684\u673a\u5236\u4e5f\u5b58\u5728\u4e9b\u8bb8\u7ec6\u5fae\u5dee\u5f02&#xff0c;\u5f15\u64ce\u4e5f\u4e0d\u4ec5\u4ec5\u53ea\u8d1f\u8d23\u6570\u636e\u7684\u7ba1\u7406&#xff0c;\u4e5f\u4f1a\u8d1f\u8d23\u5e93\u8868\u7ba1\u7406\u3001\u7d22\u5f15\u7ba1\u7406\u7b49&#xff0c;MySQL\u4e2d\u6240\u6709\u4e0e\u78c1\u76d8\u6253\u4ea4\u9053\u7684\u5de5\u4f5c&#xff0c;\u6700\u7ec8\u90fd\u4f1a\u4ea4\u7ed9\u5b58\u50a8\u5f15\u64ce\u6765\u5b8c\u6210\u3002<\/p>\n<p id=\"u8ba12f1c\">MySQL\u76ee\u524d\u6709\u975e\u5e38\u591a\u7684\u5b58\u50a8\u5f15\u64ce\u53ef\u9009\u62e9&#xff0c;\u5176\u4e2d\u6700\u4e3a\u5e38\u7528\u7684\u5219\u662fInnoDB\u4e0eMyISAM\u5f15\u64ce&#xff0c;\u53ef\u4ee5\u901a\u8fc7show variables like &#039;%storage_engine%&#039;;\u547d\u4ee4\u6765\u67e5\u770b\u5f53\u524d\u6240\u4f7f\u7528\u7684\u5f15\u64ce\u3002\u5176\u4ed6\u5f15\u64ce\u5982\u4e0b&#xff1a;<\/p>\n<p id=\"u885e7ace\">\n<p class=\"img-center\"><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"222\" id=\"ud50ff15e\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250421010318-6805995656951.png\" width=\"866\" \/><\/p>\n<p id=\"u17099fb7\">Oracle\u3001SQLServer\u7b49\u6570\u636e\u5e93\u7684\u5b9e\u73b0\u53ea\u6709\u4e00\u4e2a\u5b58\u50a8\u5f15\u64ce&#xff0c;\u56e0\u4e3a\u5b83\u4eec\u662f\u95ed\u6e90\u7684&#xff0c;\u6240\u4ee5\u4ec5\u6709\u5b98\u65b9\u81ea\u5df1\u63d0\u4f9b\u7684\u4e00\u79cd\u5f15\u64ce\u3002<\/p>\n<p id=\"u29d2bc31\">\u548c\u5176\u5b83\u6570\u636e\u5e93\u76f8\u6bd4&#xff0c;MySQL\u6709\u70b9\u4e0e\u4f17\u4e0d\u540c&#xff0c;\u5b83\u7684\u67b6\u6784\u53ef\u4ee5\u5728\u591a\u79cd\u4e0d\u540c\u573a\u666f\u4e2d\u5e94\u7528\u5e76\u53d1\u6325\u826f\u597d\u4f5c\u7528&#xff0c;\u4e3b\u8981\u4f53\u73b0\u5728\u5b58\u50a8\u5f15\u64ce\u7684\u67b6\u6784\u4e0a&#xff0c;\u63d2\u4ef6\u5f0f\u7684\u5b58\u50a8\u5f15\u64ce \u67b6\u6784\u5c06\u67e5\u8be2\u5904\u7406\u548c\u5176\u5b83\u7684\u7cfb\u7edf\u4efb\u52a1\u4ee5\u53ca\u6570\u636e\u7684\u5b58\u50a8\u63d0\u53d6\u76f8\u5206\u79bb\u3002\u8fd9\u79cd\u67b6\u6784\u53ef\u4ee5\u6839\u636e\u4e1a\u52a1\u7684\u65e0\u6c42\u548c\u5b9e\u9645\u9700\u8981\u9009\u62e9\u5408\u9002\u7684\u5b58\u50a8\u5f15\u64ce\u3002 \u540c\u65f6\u5f00\u6e90\u7684 MySQL \u8fd8\u5141\u8bb8 \u5f00\u53d1\u4eba\u5458\u8bbe\u7f6e\u81ea\u5df1\u7684\u5b58\u50a8\u5f15\u64ce\u3002<\/p>\n<p id=\"u1cb6d4d1\">\u8fd9\u79cd\u9ad8\u6548\u7684\u6a21\u5757\u5316\u67b6\u6784\u4e3a\u90a3\u4e9b\u5e0c\u671b\u4e13\u95e8\u9488\u5bf9\u7279\u5b9a\u5e94\u7528\u7a0b\u5e8f\u9700\u6c42(\u4f8b\u5982\u6570\u636e\u4ed3\u5e93\u3001\u4e8b\u52a1\u5904\u7406\u6216\u9ad8\u53ef\u7528\u6027\u60c5\u51b5)\u7684\u4eba\u63d0\u4f9b\u4e86\u5de8\u5927\u7684\u597d\u5904&#xff0c;\u540c\u65f6\u4eab\u53d7\u4f7f\u7528\u4e00\u7ec4\u72ec\u7acb\u4e8e\u4efb\u4f55\u63a5\u53e3\u548c\u670d\u52a1\u7684\u4f18\u52bf\u5b58\u50a8\u5f15\u64ce\u3002<\/p>\n<p id=\"ub0d9465e\">\u63d2\u4ef6\u5f0f\u5b58\u50a8\u5f15\u64ce\u5c42(storage Engines)&#xff0c;\u771f\u6b63\u7684\u8d1f\u8d23\u4e86MySQL\u4e2d\u6570\u636e\u7684\u5b58\u50a8\u548c\u63d0\u53d6&#xff0c;\u5bf9\u7269\u7406\u670d\u52a1\u5668\u7ea7\u522b\u7ef4\u62a4\u7684\u5e95\u5c42\u6570\u636e\u6267\u884c\u64cd\u4f5c&#xff0c;\u670d\u52a1\u5668\u901a\u8fc7API\u4e0e\u5b58\u50a8\u5f15\u64ce\u8fdb\u884c\u901a\u4fe1\u3002\u4e0d\u540c\u7684\u5b58\u50a8\u5f15\u64ce\u5177\u6709\u7684\u529f\u80fd\u4e0d\u540c&#xff0c;\u8fd9\u6837\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u5b9e\u9645\u9700\u8981\u8fdb\u884c\u9009\u53d6\u3002<\/p>\n<h3 id=\"QflPN\">6 \u5b58\u50a8\u5c42 \u2014 \u6587\u4ef6\u7cfb\u7edf&#xff08;\u4e0d\u5c5e\u4e8e MySQL \u67b6\u6784&#xff09;<\/h3>\n<p 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