{"id":894,"date":"2025-03-22T14:19:24","date_gmt":"2025-03-22T06:19:24","guid":{"rendered":"https:\/\/eve2333.top\/?p=894"},"modified":"2025-03-22T14:19:25","modified_gmt":"2025-03-22T06:19:25","slug":"mysql%e6%95%b0%e6%8d%ae%e5%ba%93%e5%85%a5%e9%97%a8%e5%88%b0%e5%a4%a7%e8%9b%87%e5%b0%9a%e7%a1%85%e8%b0%b7%e5%ae%8b%e7%ba%a2%e5%ba%b7%e8%80%81%e5%b8%88%e7%ac%94%e8%ae%b0-%e9%ab%98%e7%ba%a7%e7%af%87-pa-4","status":"publish","type":"post","link":"https:\/\/eve2333.top\/?p=894","title":{"rendered":"MySQL\u6570\u636e\u5e93\u5165\u95e8\u5230\u5927\u86c7\u5c1a\u7845\u8c37\u5b8b\u7ea2\u5eb7\u8001\u5e08\u7b14\u8bb0 \u9ad8\u7ea7\u7bc7 part 4"},"content":{"rendered":"\n

 \u7b2c04\u7ae0_\u903b\u8f91\u67b6\u6784<\/h1>\n\n\n\n

1. \u903b\u8f91\u67b6\u6784\u5256\u6790<\/h2>\n\n\n\n

\u9996\u5148MySQL\u662f\u5178\u578b\u7684C\/S\u67b6\u6784\uff0c\u5373Client\/Server\u67b6\u6784\uff0c\u670d\u52a1\u5668\u7aef\u7a0b\u5e8f\u4f7f\u7528\u7684mysqld\u3002
\u4e0d\u8bba\u5ba2\u6237\u7aef\u8fdb\u7a0b\u548c\u670d\u52a1\u5668\u8fdb\u7a0b\u662f\u91c7\u7528\u54ea\u79cd\u65b9\u5f0f\u8fdb\u884c\u901a\u4fe1\uff0c\u6700\u540e\u5b9e\u73b0\u7684\u6548\u679c\u90fd\u662f\uff1a\u5ba2\u6237\u7aef\u8fdb\u7a0b\u5411\u670d\u52a1\u5668\u8fdb\u7a0b\u53d1\u9001\u4e00\u6bb5\u6587\u672c\uff08SQL\u8bed\u53e5\uff09\uff0c\u670d\u52a1\u5668\u8fdb\u7a0b\u5904\u7406\u540e\u518d\u5411\u5ba2\u6237\u7aef\u8fdb\u7a0b\u53d1\u9001\u4e00\u6bb5\u6587\u672c\uff08\u5904\u7406\u7ed3\u679c\uff09\u3002
\u90a3\u670d\u52a1\u5668\u8fdb\u7a0b\u5bf9\u5ba2\u6237\u7aef\u8fdb\u7a0b\u53d1\u9001\u7684\u8bf7\u6c42\u505a\u4e86\u4ec0\u4e48\u5904\u7406\uff0c\u624d\u80fd\u4ea7\u751f\u6700\u540e\u7684\u5904\u7406\u7ed3\u679c\u5462\uff1f\u8fd9\u91cc\u4ee5\u67e5\u8be2\u8bf7\u6c42\u4e3a\u4f8b\u5c55\u793a\uff1a\"\"<\/p>\n\n\n\n

\"\"<\/p>\n\n\n\n

 1.2 Connectors<\/h3>\n\n\n\n

Connectors\uff0c\u6307\u7684\u662f\u4e0d\u540c\u8bed\u8a00\u4e2d\u4e0eSQL\u7684\u4ea4\u4e92\u3002MySQL\u9996\u5148\u662f\u4e00\u4e2a\u7f51\u7edc\u7a0b\u5e8f\uff0c\u5728TCP\u4e4b\u4e0a\u5b9a\u4e49\u4e86\u81ea\u5df1\u7684\u5e94\u7528\u5c42\u534f\u8bae\u3002\u6240\u4ee5\u8981\u4f7f\u7528MySQL\uff0c\u6211\u4eec\u53ef\u4ee5\u7f16\u5199\u4ee3\u7801\uff0c\u8ddfMySQLSerVer\u5efa\u7acbTCP\u8fde\u63a5\uff0c\u4e4b\u540e\u6309\u7167\u5176\u5b9a\u4e49\u597d\u7684\u534f\u8bae\u8fdb\u884c\u4ea4\u4e92\u3002
\u6216\u8005\u6bd4\u8f83\u65b9\u4fbf\u7684\u529e\u6cd5\u662f\u8c03\u7528SDK\uff0c\u6bd4\u5982NativeCAPI\u3001JDBC\u3001PHP\u7b49\u5404\u8bed\u8a00MySQLConnector\uff0c\u6216\u8005\u901a\u8fc7ODBC\u3002\u4f46\u901a\u8fc7SDK\u6765\u8bbf\u95eeMySQL\uff0c\u672c\u8d28\u4e0a\u8fd8\u662f\u5728TCP\u8fde\u63a5\u4e0a\u901a\u8fc7MySQL\u534f\u8bae\u8ddfMySQL\u8fdb\u884c\u4ea4\u4e92\u3002<\/strong>
\u63a5\u4e0b\u6765\u7684MySQLServer\u7ed3\u6784\u53ef\u4ee5\u5206\u4e3a\u5982\u4e0b\u7684\u4e09\u5c42\uff1a<\/p>\n\n\n\n

 1.3 \u7b2c1\u5c42\uff1a\u8fde\u63a5\u5c42<\/h3>\n\n\n\n

\u7cfb\u7edf\uff08\u5ba2\u6237\u7aef\uff09\u8bbf\u95eeMySQL\u670d\u52a1\u5668\u524d\uff0c\u505a\u7684\u7b2c\u4e00\u4ef6\u4e8b\u5c31\u662f\u5efa\u7acbTCP\u8fde\u63a5\u3002
\u7ecf\u8fc7\u4e09\u6b21\u63e1\u624b\u5efa\u7acb\u8fde\u63a5\u6210\u529f\u540e\uff0cMySQL\u670d\u52a1\u5668\u5bf9TCP\u4f20\u8f93\u8fc7\u6765\u7684\u8d26\u53f7\u5bc6\u7801\u505a\u8eab\u4efd\u8ba4\u8bc1\u3001\u6743\u9650\u83b7\u53d6\u3002
 \u7528\u6237\u540d\u6216\u5bc6\u7801\u4e0d\u5bf9\uff0c\u4f1a\u6536\u5230\u4e00\u4e2aAccessdeniedforuser\u9519\u8bef\uff0c\u5ba2\u6237\u7aef\u7a0b\u5e8f\u7ed3\u675f\u6267\u884c
 \u7528\u6237\u540d\u5bc6\u7801\u8ba4\u8bc1\u901a\u8fc7\uff0c\u4f1a\u4ece\u6743\u9650\u8868\u67e5\u51fa\u8d26\u53f7\u62e5\u6709\u7684\u6743\u9650\u4e0e\u8fde\u63a5\u5173\u8054\uff0c\u4e4b\u540e\u7684\u6743\u9650\u5224\u65ad\u903b\u8f91\uff0c\u90fd\u5c06\u4f9d\u8d56\u4e8e\u6b64\u65f6\u8bfb\u5230\u7684\u6743\u9650<\/strong>
\u63a5\u7740\u6211\u4eec\u6765\u601d\u8003\u4e00\u4e2a\u95ee\u9898
\u4e00\u4e2a\u7cfb\u7edf\u53ea\u4f1a\u548cMySQL\u670d\u52a1\u5668\u5efa\u7acb\u4e00\u4e2a\u8fde\u63a5\u5417\uff1f\u53ea\u80fd\u6709\u4e00\u4e2a\u7cfb\u7edf\u548cMySQL\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u5417\uff1f
\u5f53\u7136\u4e0d\u662f\uff0c\u591a\u4e2a\u7cfb\u7edf\u90fd\u53ef\u4ee5\u548cMySQL\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\uff0c\u6bcf\u4e2a\u7cfb\u7edf\u5efa\u7acb\u7684\u8fde\u63a5\u80af\u5b9a\u4e0d\u6b62\u4e00\u4e2a\u3002\u6240\u4ee5\uff0c\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\uff0c\u91c7\u7528\u957f\u8fde\u63a5\u6a21\u5f0f<\/strong>\u590d\u7528TCP\u8fde\u63a5\uff0c\u6765\u89e3\u51b3\u4e0a\u8ff0\u95ee\u9898\u3002<\/p>\n\n\n\n

 TCP\u8fde\u63a5\u6536\u5230\u8bf7\u6c42\u540e\uff0c\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\uff0c\u53bb\u8d70\u540e\u9762\u7684\u6d41\u7a0b\u3002\u6bcf\u4e00\u4e2a\u8fde\u63a5\u4ece\u7ebf\u7a0b\u6c60\u4e2d\u83b7\u53d6\u7ebf\u7a0b\uff0c\u7701\u53bb\u4e86\u521b\u5efa\u548c\u9500\u6bc1\u7ebf\u7a0b\u7684\u5f00\u9500\u3002
\u8fd9\u4e9b\u5185\u5bb9\u6211\u4eec\u90fd\u5f52\u7eb3\u5230MySQL\u7684\u8fde\u63a5\u7ba1\u7406\u7ec4\u4ef6\u4e2d\u3002
\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<\/p>\n\n\n\n

1.4 \u7b2c2\u5c42\uff1a\u670d\u52a1\u5c42<\/h3>\n\n\n\n

\u7b2c\u4e8c\u5c42\u67b6\u6784\u4e3b\u8981\u5b8c\u6210\u5927\u591a\u6570\u7684\u6838\u5fc3\u670d\u52a1\u529f\u80fd\uff0c\u5982SQL\u63a5\u53e3\uff0c\u5e76\u5b8c\u6210\u7f13\u5b58\u7684\u67e5\u8be2\uff0cSQL\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\uff0c\u5982\u8fc7\u7a0b\u3001\u51fd\u6570\u7b49\u3002
\u5728\u8be5\u5c42\uff0c\u670d\u52a1\u5668\u4f1a\u89e3\u6790\u67e5\u8be2\u5e76\u521b\u5efa\u76f8\u5e94\u7684\u5185\u90e8\u89e3\u6790\u6811\uff0c\u5e76\u5bf9\u5176\u5b8c\u6210\u76f8\u5e94\u7684\u4f18\u5316\uff1a\u5982\u786e\u5b9a\u67e5\u8be2\u8868\u7684\u987a\u5e8f\uff0c\u662f\u5426\u5229\u7528\u7d22\u5f15\u7b49\uff0c\u6700\u540e\u751f\u6210\u76f8\u5e94\u7684\u6267\u884c\u64cd\u4f5c\u3002
\u5982\u679c\u662fSELECT\u8bed\u53e5\uff0c\u670d\u52a1\u5668\u8fd8\u4f1a\u67e5\u8be2\u5185\u90e8\u7684\u7f13\u5b58\u3002\u5982\u679c\u7f13\u5b58\u7a7a\u95f4\u8db3\u591f\u5927\uff0c\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\n\n\n

SQLInterface:SQL\u63a5\u53e3<\/strong>
1.\u63a5\u6536\u7528\u6237\u7684SQL\u547d\u4ee4\uff0c\u5e76\u4e14\u8fd4\u56de\u7528\u6237\u9700\u8981\u67e5\u8be2\u7684\u7ed3\u679c\u3002\u6bd4\u5982SELECT...FROM\u5c31\u662f\u8c03\u7528SQLInterface
2.MySQL\u652f\u6301DML\uff08\u6570\u636e\u64cd\u4f5c\u8bed\u8a00\uff09\u3001DDL\uff08\u6570\u636e\u5b9a\u4e49\u8bed\u8a00\uff09\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<\/p>\n\n\n\n

\u00b7Parser:\u89e3\u6790\u5668<\/strong>
\u5728\u89e3\u6790\u5668\u4e2d\u5bf9SQL\u8bed\u53e5\u8fdb\u884c\u8bed\u6cd5\u5206\u6790\u3001\u8bed\u4e49\u5206\u6790\u3002\u5c06SQL\u8bed\u53e5\u5206\u89e3\u6210\u6570\u636e\u7ed3\u6784\uff0c\u5e76\u5c06\u8fd9\u4e2a\u7ed3\u6784\u4f20\u9012\u5230\u540e\u7eed\u6b65\u9aa4\uff0c\u4ee5\u540eSQL\u8bed\u53e5\u7684\u4f20\u9012\u548c\u5904\u7406\u5c31\u662f\u57fa\u4e8e\u8fd9\u4e2a\u7ed3\u6784\u7684\u3002\u5982\u679c\u5728\u5206\u89e3\u6784\u6210\u4e2d\u9047\u5230\u9519\u8bef\uff0c\u90a3\u4e48\u5c31\u8bf4\u660e\u8fd9\u4e2aSQL\u8bed\u53e5\u662f\u4e0d\u5408\u7406\u7684\u3002
\u5728SQL\u547d\u4ee4\u4f20\u9012\u5230\u89e3\u6790\u5668\u7684\u65f6\u5019\u4f1a\u88ab\u89e3\u6790\u5668\u9a8c\u8bc1\u548c\u89e3\u6790\uff0c\u5e76\u4e3a\u5176\u521b\u5efa\u8c31\u6cd5\u6811\uff0c\u5e76\u6839\u636e\u6570\u63e1\u5b57\u5178\u4e30\u5bcc\u67e5\u8be2\u8bed\u6cd5\u6811\uff0c\u4f1a\u9a8c\u8bc1\u8be5\u5ba2\u6237\u7aef\u662f\u5426\u5177\u6709\u6267\u884c\u8be5\u67e5\u8be2\u7684\u6743\u9650\u3002\u521b\u5efa\u597d\u8bed\u6cd5\u6811\u540e\uff0cMySQL\u8fd8\u4f1a\u5bf9SQI\u67e5\u8be2\u8fdb\u884c\u8bed\u6cd5\u4e0a\u7684\u4f18\u5316\uff0c\u8fdb\u884c\u67e5\u8be2\u91cd\u5199\u3002<\/p>\n\n\n\n

Optimizer\uff1a\u67e5\u8be2\u4f18\u5316\u5668<\/strong>
SQL\u8bed\u53e5\u5728\u8bed\u6cd5\u89e3\u6790\u4e4b\u540e\u3001\u67e5\u8be2\u4e4b\u524d\u4f1a\u4f7f\u7528\u67e5\u8be2\u4f18\u5316\u5668\u786e\u5b9aSQL\u8bed\u53e5\u7684\u6267\u884c\u8def\u5f84\uff0c\u751f\u6210\u4e00\u4e2a\u6267\u884c\u8ba1\u5212\u3002<\/strong>
\u8fd9\u4e2a\u6267\u884c\u8ba1\u5212\u8868\u660e\u5e94\u8be5\u4f7f\u7528\u54ea\u4e9b\u7d22\u5f15\u8fdb\u884c\u67e5\u8be2\uff08\u5168\u8868\u68c0\u7d22\u8fd8\u662f\u4f7f\u7528\u7d22\u5f15\u68c0\u7d22\uff09\uff0c\u8868\u4e4b\u95f4\u7684\u8fde\u63a5\u987a\u5e8f\u5982\u4f55\uff0c\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\uff0c\u5e76\u5c06\u67e5\u8be2\u7ed3\u679c\u8fd4\u56de\u7ed9\u7528\u6237\u3002<\/p>\n\n\n\n

\u5b83\u4f7f\u7528\u201d\u9009\u53d6-\u6295\u5f71-\u8fde\u63a5\u201d\u7b56\u7565\u8fdb\u884c\u67e5\u8be2\u3002\u4f8b\u5982\uff1a
                        SELECT id,name FROM student WHERE gender ='\u5973';
\u8fd9\u4e2aSELECT\u67e5\u8be2\u5148\u6839\u636eWHERE\u8bed\u53e5\u8fdb\u884c\u9009\u53d6\uff0c\u800c\u4e0d\u662f\u5c06\u8868\u5168\u90e8\u67e5\u8be2\u51fa\u6765\u4ee5\u540e\u518d\u8fdb\u884cgender\u8fc7\u6ee4\u3002\u8fd9\u4e2aSELECT\u67e5\u8be2\u5148\u6839\u636eid\u548cname\u8fdb\u884c\u5c5e\u6027\u6295\u5f71\uff0c\u800c\u4e0d\u662f\u5c06\u5c5e\u6027\u5168\u90e8\u53d6\u51fa\u4ee5\u540e\u518d\u8fdb\u884c\u8fc7\u6ee4\uff0c\u5c06\u8fd9\u4e24\u4e2a\u67e5\u8be2\u6761\u4ef6\u8fde\u63a5\u8d77\u6765\u751f\u6210\u6700\u7ec8\u67e5\u8be2\u7ed3\u679c\u3002<\/p>\n\n\n\n

Caches&Buffers:\u67e5\u8be2\u7f13\u5b58\u7ec4\u4ef6<\/strong>
MySQL\u5185\u90e8\u7ef4\u6301\u7740\u4e00\u4e9bCache\u548cBuffer\uff0c\u6bd4\u5982QueryCache\u7528\u6765\u7f13\u5b58\u4e00\u6761SELECT\u8bed\u53e5\u7684\u6267\u884c\u7ed3\u679c\uff0c\u5982\u679c\u80fd\u591f\u5728\u5176\u4e2d\u627e\u5230\u5bf9\u5e94\u7684\u67e5\u8be2\u7ed3\u679c\uff0c\u90a3\u4e48\u5c31\u4e0d\u5fc5\u518d\u8fdb\u884c\u67e5\u8be2\u89e3\u6790\u3001\u4f18\u5316\u548c\u6267\u884c\u7684\u6574\u4e2a\u8fc7\u7a0b\u4e86\uff0c\u76f4\u63a5\u5c06\u7ed3\u679c\u53cd\u9988\u7ed9\u5ba2\u6237\u7aef\u3002<\/p>\n\n\n\n

\u8fd9\u4e2a\u7f13\u5b58\u673a\u5236\u662f\u7531\u4e00\u7cfb\u5217\u5c0f\u7f13\u5b58\u7ec4\u6210\u7684\u3002\u6bd4\u5982\u8868\u7f13\u5b58\uff0c\u8bb0\u5f55\u7f13\u5b58\uff0ckey\u7f13\u5b58\uff0c\u6743\u9650\u7f13\u5b58\u7b49\u3002
\u8fd9\u4e2a\u8be2\u7f13\u5b58\u53ef\u4ee5\u5728\u4e0d\u540c\u5ba2\u6237\u7aef\u4e4b\u95f4\u5171\u4eab\u3002
\u4eceMySQL5.7.20\u5f00\u59cb\uff0c\u4e0d\u63a8\u8350\u4f7f\u7528\u67e5\u8be2\u7f13\u5b58\uff0c\u5e76\u5728MySQL8.0\u4e2d\u5220\u9664\u3002<\/p>\n\n\n\n

 1.5 \u7b2c3\u5c42\uff1a\u5f15\u64ce\u5c42<\/h3>\n\n\n\n

\u548c\u5176\u5b83\u6570\u636e\u5e93\u76f8\u6bd4\uff0cMySQL\u6709\u70b9\u4e0e\u4f17\u4e0d\u540c\uff0c\u5b83\u7684\u67b6\u6784\u53ef\u4ee5\u5728\u591a\u79cd\u4e0d\u540c\u573a\u666f\u4e2d\u5e94\u7528\u5e76\u53d1\u6325\u826f\u597d\u4f5c\u7528\uff0c\u4e3b\u8981\u4f53\u73b0\u5728\u5b58\u50a8\u5f15\u64ce\u7684\u67b6\u6784\u4e0a\uff0c\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\u9700\u6c42\u548c\u5b9e\u9645\u9700\u8981\u9009\u62e9\u5408\u9002\u7684\u5b58\u50a8\u5f15\u64ce\u3002\u540c\u65f6\u5f00\u6e90\u7684MySQL\u8fd8\u5141\u8bb8\u5f00\u53d1\u4eba\u5458\u8bbe\u7f6e\u81ea\u5df1\u7684\u5b58\u50a8\u5f15\u64ce\u3002<\/p>\n\n\n\n

\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\uff08\u4f8b\u5982\u6570\u636e\u4ed3\u5e93\u3001\u4e8b\u52a1\u5904\u7406\u6216\u9ad8\u53ef\u7528\u6027\u60c5\u51b5\uff09\u7684\u4eba\u63d0\u4f9b\u4e86\u5de8\u5927\u7684\u597d\u5904\uff0c\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
\u63d2\u4ef6\u5f0f\u5b58\u50a8\u5f15\u5f15\u64ce\u5c42\uff08StorageEngines\uff09\uff0c\u771f\u6b63\u7684\u8d1f\u8d23\u4e86MySQL\u4e2d\u6570\u636e\u7684\u5b58\u50a8\u548c\u63d0\u53d6\uff0c\u5bf9\u7269\u7406\u670d\u52a1\u5668\u7ea7\u522b\u7ef4\u62a4\u7684\u5e95\u5c42\u6570\u636e\u6267\u884c\u64cd\u4f5c\uff0c\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\uff0c\u8fd9\u6837\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u5b9e\u9645\u9700\u8981\u8fdb\u884c\u9009\u53d6\u3002<\/p>\n\n\n\n

MySQL8.0.25\u9ed8\u8ba4\u652f\u6301\u7684\u5b58\u50a8\u5f15\u64ce\u5982\u4e0b\uff1a\"\"<\/p>\n\n\n\n

1.6 \u5b58\u50a8\u5c42 \u6240\u6709\u7684\u6570\u636e\uff0c\u6570\u636e\u5e93\u3001\u8868\u7684\u5b9a\u4e49\uff0c\u8868\u7684\u6bcf\u4e00\u884c\u7684\u5185\u5bb9\uff0c\u7d22\u5f15\uff0c\u90fd\u662f\u5b58\u5728 \u6587\u4ef6\u7cfb\u7edf\u4e0a\uff0c\u4ee5 \u6587\u4ef6\u7684\u65b9\u5f0f\u5b58 \u5728\u7684\uff0c\u5e76\u5b8c\u6210\u4e0e\u5b58\u50a8\u5f15\u64ce\u7684\u4ea4\u4e92\u3002\u5f53\u7136\u6709\u4e9b\u5b58\u50a8\u5f15\u64ce\u6bd4\u5982InnoDB\uff0c\u4e5f\u652f\u6301\u4e0d\u4f7f\u7528\u6587\u4ef6\u7cfb\u7edf\u76f4\u63a5\u7ba1\u7406\u88f8\u8bbe \u5907\uff0c\u4f46\u73b0\u4ee3\u6587\u4ef6\u7cfb\u7edf\u7684\u5b9e\u73b0\u4f7f\u5f97\u8fd9\u6837\u505a\u6ca1\u6709\u5fc5\u8981\u4e86\u3002\u5728\u6587\u4ef6\u7cfb\u7edf\u4e4b\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u672c\u5730\u78c1\u76d8\uff0c\u53ef\u4ee5\u4f7f\u7528 DAS\u3001NAS\u3001SAN\u7b49\u5404\u79cd\u5b58\u50a8\u7cfb\u7edf\u3002 <\/p>\n\n\n\n

2. SQL\u6267\u884c\u6d41\u7a0b!!!\u91cd\u8981\u91cd\u8981!!!<\/h2>\n\n\n\n

\u00a0\"\"<\/p>\n\n\n\n

1.\u67e5\u8be2\u7f13\u5b58\uff1a<\/h4>\n\n\n\n

Server\u5982\u679c\u5728\u67e5\u8be2\u7f13\u5b58\u4e2d\u53d1\u73b0\u4e86\u8fd9\u6761SQL\u8bed\u53e5\uff0c\u5c31\u4f1a\u76f4\u63a5\u5c06\u7ed3\u679c\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\uff1a\u5982\u679c\u6ca1\u6709\uff0c\u5c31\u8fdb\u5165\u5230\u89e3\u6790\u5668\u9636\u6bb5\u3002\u9700\u8981\u8bf4\u660e\u7684\u662f\uff0c\u56e0\u4e3a\u67e5\u8be2\u7f13\u5b58\u5f80\u5f80\u6548\u7387\u4e0d\u9ad8\uff0c\u6240\u4ee5\u5728MySQL8.0\u4e4b\u540e\u5c31\u629b\u5f03\u4e86\u8fd9\u4e2a\u529f\u80fd\u3002<\/p>\n\n\n\n

\n

 MySQL\u62ff\u5230\u4e00\u4e2a\u67e5\u8be2\u8bf7\u6c42\u540e\uff0c\u4f1a\u5148\u5230\u67e5\u8be2\u7f13\u5b58\u770b\u770b\uff0c\u4e4b\u524d\u662f\u4e0d\u662f\u6267\u884c\u8fc7\u8fd9\u6761\u8bed\u53e5\u3002\u4e4b\u524d\u6267\u884c\u8fc7\u7684\u8bed\u53e5\u53ca\u5176\u7ed3\u679c\u53ef\u80fd\u4f1a\u4ee5key-value\u5bf9\u7684\u5f62\u5f0f\uff0c\u88ab\u76f4\u63a5\u7f13\u5b58\u5728\u5185\u5b58\u4e2d\u3002key\u662f\u67e5\u8be2\u7684\u8bed\u53e5\uff0cvalue\u662f\u67e5\u8be2\u7684\u7ed3\u679c\u3002\u5982\u679c\u4f60\u7684\u67e5\u8be2\u80fd\u591f\u76f4\u63a5\u5728\u8fd9\u4e2a\u7f13\u5b58\u4e2d\u627e\u5230key\uff0c\u90a3\u4e48\u8fd9\u4e2avalue\u5c31\u4f1a\u88ab\u76f4\u63a5\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u3002\u5982\u679c\u8bed\u53e5\u4e0d\u5728\u67e5\u8be2\u7f13\u5b58\u4e2d\uff0c\u5c31\u4f1a\u7ee7\u7eed\u540e\u9762\u7684\u6267\u884c\u9636\u6bb5\u3002\u6267\u884c\u5b8c\u6210\u540e\uff0c\u6267\u884c\u7ed3\u679c\u4f1a\u88ab\u5b58\u5165\u67e5\u8be2\u7f13\u5b58\u4e2d\u3002\u6240\u4ee5\uff0c\u5982\u679c\u67e5\u8be2\u547d\u4e2d\u7f13\u5b58\uff0cMySQL\u4e0d\u9700\u8981\u6267\u884c\u540e\u9762\u7684\u590d\u6742
\u64cd\u4f5c\uff0c\u5c31\u53ef\u4ee5\u76f4\u63a5\u8fd4\u56de\u7ed3\u679c\uff0c\u8fd9\u4e2a\u6548\u7387\u4f1a\u5f88\u9ad8\u3002<\/p>\n<\/blockquote>\n\n\n\n

 \u5927\u591a\u6570\u60c5\u51b5\u67e5\u8be2\u7f13\u5b58\u5c31\u662f\u4e2a\u9e21\u808b<\/strong>\uff0c\u4e3a\u4ec0\u4e48\u5462\uff1f\u770b\u770b\u5c31\u597d<\/strong>
\u67e5\u8be2\u7f13\u5b58\u662f\u63d0\u524d\u628a\u67e5\u8be2\u7ed3\u679c\u7f13\u5b58\u8d77\u6765\uff0c\u8fd9\u6837\u4e0b\u6b21\u4e0d\u9700\u8981\u6267\u884c\u5c31\u53ef\u4ee5\u76f4\u63a5\u62ff\u5230\u7ed3\u679c\u3002\u9700\u8981\u8bf4\u660e\u7684\u662f\uff0c\u5728 MySQL \u4e2d\u7684\u67e5\u8be2\u7f13\u5b58\uff0c\u4e0d\u662f\u7f13\u5b58\u67e5\u8be2\u8ba1\u5212\uff0c\u800c\u662f\u67e5\u8be2\u5bf9\u5e94\u7684\u7ed3\u679c\u3002\u8fd9\u5c31\u610f\u5473\u7740\u67e5\u8be2\u5339\u914d\u7684 \u4f4e\uff0c\u53ea\u6709 \u9c81\u68d2\u6027\u5927\u5927\u964d \u76f8\u540c\u7684\u67e5\u8be2\u64cd\u4f5c\u624d\u4f1a\u547d\u4e2d\u67e5\u8be2\u7f13\u5b58\u3002\u4e24\u4e2a\u67e5\u8be2\u8bf7\u6c42\u5728\u4efb\u4f55\u5b57\u7b26\u4e0a\u7684\u4e0d\u540c\uff08\u4f8b\u5982\uff1a\u7a7a\u683c\u3001\u6ce8\u91ca\u3001 \u5927\u5c0f\u5199\uff09\uff0c\u90fd\u4f1a\u5bfc\u81f4\u7f13\u5b58\u4e0d\u4f1a\u547d\u4e2d\u3002\u56e0\u6b64 MySQL \u7684 \u67e5\u8be2\u7f13\u5b58\u547d\u4e2d\u7387\u4e0d\u9ad8\u3002 \u540c\u65f6\uff0c\u5982\u679c\u67e5\u8be2\u8bf7\u6c42\u4e2d\u5305\u542b\u67d0\u4e9b\u7cfb\u7edf\u51fd\u6570\u3001\u7528\u6237\u81ea\u5b9a\u4e49\u53d8\u91cf\u548c\u51fd\u6570\u3001\u4e00\u4e9b\u7cfb\u7edf\u8868\uff0c\u5982 mysql \u3001 information_schema\u3001 performance_schema \u6570\u636e\u5e93\u4e2d\u7684\u8868\uff0c\u90a3\u8fd9\u4e2a\u8bf7\u6c42\u5c31\u4e0d\u4f1a\u88ab\u7f13\u5b58\u3002\u4ee5\u67d0\u4e9b\u7cfb\u7edf\u51fd\u6570 \u4e3e\u4f8b\uff0c\u53ef\u80fd\u540c\u6837\u7684\u51fd\u6570\u7684\u4e24\u6b21\u8c03\u7528\u4f1a\u4ea7\u751f\u4e0d\u4e00\u6837\u7684\u7ed3\u679c\uff0c\u6bd4\u5982\u51fd\u6570 NOW \uff0c\u6bcf\u6b21\u8c03\u7528\u90fd\u4f1a\u4ea7\u751f\u6700\u65b0\u7684\u5f53\u524d \u65f6\u95f4\uff0c\u5982\u679c\u5728\u4e00\u4e2a\u67e5\u8be2\u8bf7\u6c42\u4e2d\u8c03\u7528\u4e86\u8fd9\u4e2a\u51fd\u6570\uff0c\u90a3\u5373\u4f7f\u67e5\u8be2\u8bf7\u6c42\u7684\u6587\u672c\u4fe1\u606f\u90fd\u4e00\u6837\uff0c\u90a3\u4e0d\u540c\u65f6\u95f4\u7684\u4e24\u6b21 \u67e5\u8be2\u4e5f\u5e94\u8be5\u5f97\u5230\u4e0d\u540c\u7684\u7ed3\u679c\uff0c\u5982\u679c\u5728\u7b2c\u4e00\u6b21\u67e5\u8be2\u65f6\u5c31\u7f13\u5b58\u4e86\uff0c\u90a3\u7b2c\u4e8c\u6b21\u67e5\u8be2\u7684\u65f6\u5019\u76f4\u63a5\u4f7f\u7528\u7b2c\u4e00\u6b21\u67e5\u8be2 \u7684\u7ed3\u679c\u5c31\u662f\u9519\u8bef\u7684\uff01
\u6b64\u5916\uff0c\u65e2\u7136\u662f\u7f13\u5b58\uff0c\u90a3\u5c31\u6709\u5b83 \u7f13\u5b58\u5931\u6548\u7684\u65f6\u5019\u3002MySQL\u7684\u7f13\u5b58\u7cfb\u7edf\u4f1a\u76d1\u6d4b\u6d89\u53ca\u5230\u7684\u6bcf\u5f20\u8868\uff0c\u53ea\u8981\u8be5\u8868\u7684 \u7ed3\u6784\u6216\u8005\u6570\u636e\u88ab\u4fee\u6539\uff0c\u5982\u5bf9\u8be5\u8868\u4f7f\u7528\u4e86 INSERT \u3001 UPDATE \u3001 DELETE \u3001 TRUNCATE TABLE \u3001 TABLE \u3001 DROP TABLE \u6216 ALTER DROP DATABASE \u8bed\u53e5\uff0c\u90a3\u4f7f\u7528\u8be5\u8868\u7684\u6240\u6709\u9ad8\u901f\u7f13\u5b58\u67e5\u8be2\u90fd\u5c06\u53d8\u4e3a\u65e0\u6548\u5e76\u4ece\u9ad8\u901f\u7f13\u5b58\u4e2d\u5220\u9664\uff01\u5bf9\u4e8e \u66f4\u65b0\u538b\u529b\u5927\u7684\u6570\u636e\u5e93\u6765\u8bf4\uff0c\u67e5\u8be2\u7f13\u5b58\u7684\u547d\u4e2d\u7387\u4f1a\u975e\u5e38\u4f4e\u3002<\/p>\n\n\n\n

\u00a0\"\"\u7b2c\u4e00\u4e2a\u8d8a\u5927,\u67e5\u8be2\u7f13\u5b58\u7684\u788e\u7247\u8d8a\u591a.
\u7b2c\u4e8c\u4e2a\u7f13\u5b58\u5927\u5c0f\"\"<\/p>\n\n\n\n

\u5982\u679c\u6ca1\u6709\u547d\u4e2d\u67e5\u8be2\u7f13\u5b58\uff0c\u5c31\u8981\u5f00\u59cb\u771f\u6b63\u6267\u884c\u8bed\u53e5\u4e86\u3002\u9996\u5148\uff0cMySQL\u9700\u8981\u77e5\u9053\u4f60\u8981\u505a\u4ec0\u4e48\uff0c\u56e0\u6b64\u9700\u8981\u5bf9SQL\u8bed\u53e5\u505a\u89e3\u6790\u3002SQL\u8bed\u53e5\u7684\u5206\u6790\u5206\u4e3a\u8bcd\u6cd5\u5206\u6790\u4e0e\u8bed\u6cd5\u5206\u6790\u3002
\u5206\u6790\u5668\u5148\u505a\u201c\u8bcd\u6cd5\u5206\u6790\u201d\u3002\u4f60\u8f93\u5165\u7684\u662f\u7531\u591a\u4e2a\u5b57\u7b26\u4e32\u548c\u7a7a\u683c\u7ec4\u6210\u7684\u4e00\u6761SQL\u8bed\u53e5\uff0cMySQL\u9700\u8981\u8bc6\u522b\u51fa\u91cc\u9762\u7684\u5b57\u7b26\u4e32\u5206\u522b\u662f\u4ec0\u4e48\uff0c\u4ee3\u8868\u4ec0\u4e48\u3002
MySQL\u4ece\u4f60\u8f93\u5165\u7684\"select\"\u8fd9\u4e2a\u5173\u952e\u5b57\u8bc6\u522b\u51fa\u6765\uff0c\u8fd9\u662f\u4e00\u4e2a\u67e5\u8be2\u8bed\u53e5\u3002\u5b83\u4e5f\u8981\u628a\u5b57\u7b26\u4e32\u201cT\"\u8bc6\u522b\u6210\u201c\u8868\u540dT\"\uff0c\u628a\u5b57\u7b26\u4e32\"ID\"\u8bc6\u522b\u6210\"\u5217ID\"\u3002
\u63a5\u7740\uff0c\u8981\u505a\u201d\u8bed\u6cd5\u5206\u6790\u201d\u3002\u6839\u636e\u8bcd\u6cd5\u5206\u6790\u7684\u7ed3\u679c\uff0c\u8bed\u6cd5\u5206\u6790\u5668\uff08\u6bd4\u5982\uff1aBison\uff09\u4f1a\u6839\u636e\u8bed\u6cd5\u89c4\u5219\uff0c\u5224\u65ad\u4f60\u8f93\u5165\u7684\u8fd9\u4e2aSQL\u8bed\u53e5\u662f\u5426\u6ee1\u8db3MySQL\u8bed\u6cd5\u3002
\u5982\u679c\u4f60\u7684\u8bed\u53e5\u4e0d\u5bf9\uff0c\u5c31\u4f1a\u6536\u5230\u201cYouhave anerrorinyourSQLsyntax\"\u7684\u9519\u8bef\u63d0\u9192\uff0c\u6bd4\u5982\u4e0b\u9762\u8fd9\u4e2a\u8bed\u53e5from\u5199\u6210\u4e86\"rom\"\u3002\"\"<\/p>\n\n\n\n

 2. \u89e3\u6790\u5668\uff1a<\/h4>\n\n\n\n

3. \u4f18\u5316\u5668\uff1a<\/h4>\n\n\n\n

\u5728\u89e3\u6790\u5668\u4e2d\u5bf9 SQL \u8bed\u53e5\u8fdb\u884c\u8bed\u6cd5\u5206\u6790\u3001\u8bed\u4e49\u5206\u6790\u3002<\/h4>\n\n\n\n

\"\"<\/p>\n\n\n\n

 \u5c06\u572810\u7ae0\u8be6\u7ec6\u9610\u8ff0<\/p>\n\n\n\n

\u5728\u67e5\u8be2\u4f18\u5316\u5668\u4e2d\uff0c\u53ef\u4ee5\u5206\u4e3a\u903b\u8f91\u67e5\u8be2\u4f18\u5316\u9636\u6bb5\u548c\u7269\u7406\u67e5\u8be2\u4f18\u5316\u9636\u6bb5\u3002<\/p>\n\n\n\n

\u903b\u8f91\u67e5\u8be2\u4f18\u5316\u5c31\u662f\u901a\u8fc7\u6539\u53d8SQL\u8bed\u53e5\u7684\u5185\u5bb9\u6765\u4f7f\u5f97SQL\u67e5\u8be2\u66f4\u9ad8\u6548\uff0c\u540c\u65f6\u4e3a\u7269\u7406\u67e5\u8be2\u4f18\u5316\u63d0\u4f9b\u66f4\u591a\u7684\u5019\u9009\u6267\u884c\u8ba1\u5212\u3002\u901a\u5e38\u91c7\u7528\u7684\u65b9\u5f0f\u662f\u5bf9SQL\u8bed\u53e5\u8fdb\u884c\u7b49\u4ef7\u53d8\u6362\uff0c\u5bf9\u67e5\u8be2\u8fdb\u884c\u91cd\u5199\uff0c\u800c\u67e5\u8be2\u91cd\u5199\u7684\u6570\u5b66\u57fa\u7840\u5c31\u662f\u5173\u7cfb\u4ee3\u6570\u3002\u5bf9\u6761\u4ef6\u8868\u8fbe\u5f0f\u8fdb\u884c\u7b49\u4ef7\u8c13\u8bcd\u91cd\u5199\u3001\u6761\u4ef6\u7b80\u5316\uff0c\u5bf9\u89c6\u56fe\u8fdb\u884c\u91cd\u5199\uff0c\u5bf9\u5b50\u67e5\u8be2\u8fdb\u884c\u4f18\u5316\uff0c\u5bf9\u8fde\u63a5\u8bed\u4e49\u8fdb\u884c\u4e86\u5916\u8fde\u63a5\u6d88\u9664\u3001\u5d4c\u5957\u8fde\u63a5\u6d88\u9664\u7b49\u3002<\/p>\n\n\n\n

\u7269\u7406\u67e5\u8be2\u4f18\u5316\u662f\u57fa\u4e8e\u5173\u7cfb\u4ee3\u6570\u8fdb\u884c\u7684\u67e5\u8be2\u91cd\u5199\uff0c\u800c\u5173\u7cfb\u4ee3\u6570\u7684\u6bcf\u4e00\u6b65\u90fd\u5bf9\u5e94\u7740\u7269\u7406\u8ba1\u7b97\uff0c\u8fd9\u4e9b\u7269\u7406\u8ba1\u7b97\u5f80\u5f80\u5b58\u5728\u591a\u79cd\u7b97\u6cd5\uff0c\u56e0\u6b64\u9700\u8981\u8ba1\u7b97\u5404\u79cd\u7269\u7406\u8def\u5f84\u7684\u4ee3\u4ef7\uff0c\u4ece\u4e2d\u9009\u62e9\u4ee3\u4ef7\u6700\u5c0f\u7684\u4f5c\u4e3a\u6267\u884c\u8ba1\u5212\u3002\u5728\u8fd9\u4e2a\u9636\u6bb5\u91cc\uff0c\u5bf9\u4e8e\u5355\u8868\u548c\u591a\u8868\u8fde\u63a5\u7684\u64cd\u4f5c\uff0c\u9700\u8981\u9ad8\u6548\u5730\u4f7f\u7528\u7d22\u5f15\uff0c\u63d0\u5347\u67e5\u8be2\u6548\u7387\u3002<\/p>\n\n\n\n

\u5728\u4f18\u5316\u5668\u4e2d\u4f1a\u786e\u5b9a SQL \u8bed\u53e5\u7684\u6267\u884c\u8def\u5f84\uff0c\u6bd4\u5982\u662f\u6839\u636e\u5168\u8868\u68c0\u7d22\uff0c\u8fd8\u662f\u6839\u636e\u7d22\u5f15\u68c0\u7d22\u7b49\u3002<\/p>\n\n\n\n

 4. \u6267\u884c\u5668\uff1a<\/h4>\n\n\n\n

\u622a\u6b62\u5230\u73b0\u5728\uff0c\u8fd8\u6ca1\u6709\u771f\u6b63\u53bb\u8bfb\u5199\u771f\u5b9e\u7684\u8868\uff0c\u4ec5\u4ec5\u53ea\u662f\u4ea7\u51fa\u4e86\u4e00\u4e2a\u6267\u884c\u8ba1\u5212\u3002\u4e8e\u662f\u5c31\u8fdb\u5165\u4e86 \u6267\u884c\u5668\u9636\u6bb5\u3002\"\"<\/p>\n\n\n\n

2.2 MySQL8\u4e2dSQL\u6267\u884c\u539f\u7406<\/h3>\n\n\n\n
1. \u786e\u8ba4profiling \u662f\u5426\u5f00\u542f \n\u4e86\u89e3\u67e5\u8be2\u8bed\u53e5\u5e95\u5c42\u6267\u884c\u7684\u8fc7\u7a0b\uff1aselect@@profiling\uff1b\u6216\u8005showvariables1ike\u2018%profiling%\u67e5\u770b\n\u662f\u5426\u5f00\u542f\u8ba1\u5212\u3002\u5f00\u542f\u5b83\u53ef\u4ee5\u8ba9MySQL\u6536\u96c6\u5728SQL\u6267\u884c\u65f6\u6240\u4f7f\u7528\u7684\u8d44\u6e90\u60c5\u51b5\uff0c\u547d\u4ee4\u5982\u4e0b\uff1a\n mysql> select @@profiling;\n mysql> show variables like 'profiling';<\/code><\/pre>\n\n\n\n
profiling=0\u4ee3\u8868\u5173\u95ed\uff0c\u6211\u4eec\u9700\u8981\u628aprofiling\u6253\u5f00\uff0c\u5373\u8bbe\u7f6e\u4e3a1\uff1a
mysql> set profiling=1;
Profiling\u529f\u80fd\u7531MySQL\u4f1a\u8bdd\u53d8\u91cf\uff1aprofiling\u63a7\u5236\u3002\u9ed8\u8ba4\u662fOFF\uff08\u5173\u95ed\u72b6\u6001\uff09\u3002 <\/p>\n\n\n\n
\u591a\u6b21\u6267\u884c\u76f8\u540cSQL\u67e5\u8be2 \u7136\u540e\u6211\u4eec\u6267\u884c\u4e00\u4e2a SQL \u67e5\u8be2\uff08\u4f60\u53ef\u4ee5\u6267\u884c\u4efb\u4f55\u4e00\u4e2a SQL \u67e5\u8be2\uff09\uff1a mysql> select * from employees;<\/p>\n\n\n\n
\u67e5\u770bprofiles \u67e5\u770b\u5f53\u524d\u4f1a\u8bdd\u6240\u4ea7\u751f\u7684\u6240\u6709 profiles\uff1a mysql> show profiles; \u00a0# \u663e\u793a\u6700\u8fd1\u7684\u51e0\u6b21\u67e5\u8be2\"\"<\/p>\n\n\n\n
\u67e5\u770bprofile \u663e\u793a\u6267\u884c\u8ba1\u5212\uff0c\u67e5\u770b\u7a0b\u5e8f\u7684\u6267\u884c\u6b65\u9aa4\uff1a mysql> show profile;<\/p>\n\n\n\n
\u5f53\u7136\u4f60\u4e5f\u53ef\u4ee5\u67e5\u8be2\u6307\u5b9a\u7684 Query ID\uff0c\u6bd4\u5982\uff1a mysql> show profile for query 7;<\/p>\n\n\n\n
\u67e5\u8be2 SQL \u7684\u6267\u884c\u65f6\u95f4\u7ed3\u679c\u548c\u4e0a\u9762\u662f\u4e00\u6837\u7684\u3002 \u6b64\u5916\uff0c\u8fd8\u53ef\u4ee5\u67e5\u8be2\u66f4\u4e30\u5bcc\u7684\u5185\u5bb9\uff1a mysql> show profile cpu,block io for query 6;
\"\"<\/p>\n\n\n\n
vim \/etc\/my.cnf\n\u7136\u540e\u4f60\u5c31\u53ef\u4ee5\u5728 \/etc\/my.cnf \u4e2d\u65b0\u589e\u4e00\u884c\uff1a query_cache_type=1\n\u7136\u540e\u91cd\u542f\nsystemctl restart mysqld<\/code><\/pre>\n\n\n\n
\u00a0\"\"\"\"<\/p>\n\n\n\n
\u00a0\"\"<\/p>\n\n\n\n
\u57288.0\u7248\u672c\u4e4b\u540e\uff0cMySQL\u4e0d\u518d\u652f\u6301\u7f13\u5b58\u7684\u67e5\u8be2\u3002\u4e00\u65e6\u6570\u636e\u8868\u6709\u66f4\u65b0\uff0c\u7f13\u5b58\u90fd\u5c06\u6e05\u7a7a\uff0c\u56e0\u6b64\u53ea\u6709\u6570\u636e\u8868\u662f\u9759\u6001\u7684\u65f6\u5019\uff0c\u6216\u8005\u6570\u636e\u8868\u5f88\u5c11\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u4f7f\u7528\u7f13\u5b58\u67e5\u8be2\u624d\u6709\u4ef7\u503c\uff0c\u5426\u5219\u5982\u679c\u6570\u636e\u8868\u7ecf\u5e38\u66f4\u65b0\uff0c\u53cd\u800c\u589e\u52a0\u4e86SQL\u7684\u67e5\u8be2\u65f6\u95f4\u3002 <\/p>\n\n\n\n
2.3 MySQL5.7\u4e2dSQL\u6267\u884c\u539f\u7406<\/h3>\n\n\n\n
\"\"<\/h3>\n\n\n\n
6. \u67e5\u770bprofile \u663e\u793a\u6267\u884c\u8ba1\u5212\uff0c\u67e5\u770b\u7a0b\u5e8f\u7684\u6267\u884c\u6b65\u9aa4\uff1a mysql> show profile for query 1; mysql> show profile for query 2; \u7ed3\u8bba\u4e0d\u8a00\u800c\u55bb\u3002\u6267\u884c\u7f16\u53f72\u65f6\uff0c\u6bd4\u6267\u884c\u7f16\u53f71\u65f6\u5c11\u4e86\u5f88\u591a\u4fe1\u606f\uff0c\u4ece\u622a\u56fe\u4e2d\u53ef\u4ee5\u770b\u51fa\u67e5\u8be2\u8bed\u53e5\u76f4\u63a5\u4ece\u7f13\u5b58\u4e2d \u83b7\u53d6\u6570\u636e\u3002 <\/p>\n\n\n\n
2.5 Oracle\u7684SQL\u6267\u884c\u6d41\u7a0b\uff08\u4e86\u89e3\uff09<\/h3>\n\n\n\n
Oracle \u4e2d\u91c7\u7528\u4e86 \u5171\u4eab\u6c60\u6765\u5224\u65ad SQL \u8bed\u53e5\u662f\u5426\u5b58\u5728\u7f13\u5b58\u548c\u6267\u884c\u8ba1\u5212\uff0c\u901a\u8fc7\u8fd9\u4e00\u6b65\u9aa4\u6211\u4eec\u53ef\u4ee5\u77e5\u9053\u5e94\u8be5\u91c7\u7528 \u786c\u89e3\u6790\u8fd8\u662f\u8f6f\u89e3\u6790\u3002 \u6211\u4eec\u5148\u6765\u770b\u4e0b SQL \u5728 Oracle \u4e2d\u7684\u6267\u884c\u8fc7\u7a0b\uff1a\"\"<\/p>\n\n\n\n
1.\u8bed\u6cd5\u68c0\u67e5\uff1a\u68c0\u67e5SQL\u62fc\u5199\u662f\u5426\u6b63\u786e\uff0c\u5982\u679c\u4e0d\u6b63\u786e\uff0cOracle\u4f1a\u62a5\u8bed\u6cd5\u9519\u8bef\u3002<\/p>\n\n\n\n
2.\u8bed\u4e49\u68c0\u67e5\uff1a\u68c0\u67e5SQL\u4e2d\u7684\u8bbf\u95ee\u5bf9\u8c61\u662f\u5426\u5b58\u5728\u3002\u6bd4\u5982\u6211\u4eec\u5728\u5199SELECT\u8bed\u53e5\u7684\u65f6\u5019\uff0c\u5217\u540d\u5199\u9519\u4e86\uff0c\u7cfb\u7edf\u5c31\u4f1a\u63d0\u793a\u9519\u8bef\u3002\u8bed\u6cd5\u68c0\u67e5\u548c\u8bed\u4e49\u68c0\u67e5\u7684\u4f5c\u7528\u662f\u4fdd\u8bc1SQL\u8bed\u53e5\u6ca1\u6709\u9519\u8bef\u3002<\/p>\n\n\n\n
3.\u6743\u9650\u68c0\u67e5\uff1a\u770b\u7528\u6237\u662f\u5426\u5177\u5907\u8bbf\u95ee\u8be5\u6570\u636e\u7684\u6743\u9650\u3002<\/p>\n\n\n\n
4.\u5171\u4eab\u6c60\u68c0\u67e5\uff1a\u5171\u4eab\u6c60\uff08SharedPool\uff09\u662f\u4e00\u5757\u5185\u5b58\u6c60\uff0c\u6700\u4e3b\u8981\u7684\u4f5c\u7528\u662f\u7f13\u5b58SQL\u8bed\u53e5\u548c\u8be5\u8bed\u53e5\u7684\u6267\u884c\u8ba1\u5212\u3002
Oracle\u901a\u8fc7\u68c0\u67e5\u5171\u4eab\u6c60\u662f\u5426\u5b58\u5728SQL\u8bed\u53e5\u7684\u6267\u884c\u8ba1\u5212\uff0c\u6765\u5224\u65ad\u8fdb\u884c\u8f6f\u89e3\u6790\uff0c\u8fd8\u662f\u786c\u89e3\u6790\u3002\u90a3\u8f6f\u89e3\u6790\u548c\u786c\u89e3\u6790\u53c8\u8be5\u600e\u4e48\u7406\u89e3\u5462\uff1f<\/p>\n\n\n\n
\u5728\u5171\u4eab\u6c60\u4e2d\uff0cOracle\u9996\u5148\u5bf9SQL\u8bed\u53e5\u8fdb\u884cHash\u8fd0\u7b97\uff0c\u7136\u540e\u6839\u636eHash\u503c\u5728\u5e93\u7f13\u5b58\uff08Library Cache\uff09\u4e2d\u67e5\u627e\uff0c\u5982\u679c\u5b58\u5728SQL\u8bed\u53e5\u7684\u6267\u884c\u8ba1\u5212\uff0c\u5c31\u76f4\u63a5\u62ff\u6765\u6267\u884c\uff0c\u76f4\u63a5\u8fdb\u5165\u201c\u6267\u884c\u5668\"\u7684\u73af\u8282\uff0c\u8fd9\u5c31\u662f\u8f6f\u89e3\u6790\u3002
\u5982\u679c\u6ca1\u6709\u627e\u5230SQL\u8bed\u53e5\u548c\u6267\u884c\u8ba1\u5212\uff0cOracle\u5c31\u9700\u8981\u521b\u5efa\u89e3\u6790\u6811\u8fdb\u884c\u89e3\u6790\uff0c\u751f\u6210\u6267\u884c\u8ba1\u5212\uff0c\u8fdb\u5165\u201c\u4f18\u5316\u5668\u201d\u8fd9\u4e2a\u6b65\u9aa4\uff0c\u8fd9\u5c31\u662f\u786c\u89e3\u6790\u3002<\/p>\n\n\n\n
5.   \u4f18\u5316\u5668\uff1a\u4f18\u5316\u5668\u4e2d\u5c31\u662f\u8981\u8fdb\u884c\u786c\u89e3\u6790\uff0c\u4e5f\u5c31\u662f\u51b3\u5b9a\u600e\u4e48\u505a\uff0c\u6bd4\u5982\u521b\u5efa\u89e3\u6790\u6811\uff0c\u751f\u6210\u6267\u884c\u8ba1\u5212\u3002<\/p>\n\n\n\n
6\uff0e \u6267\u884c\u5668\uff1a\u5f53\u6709\u4e86\u89e3\u6790\u6811\u548c\u6267\u884c\u8ba1\u5212\u4e4b\u540e\uff0c\u5c31\u77e5\u9053\u4e86SQL\u8be5\u600e\u4e48\u88ab\u6267\u884c\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u5728\u6267\u884c\u5668\u4e2d\u6267\u884c\u8bed\u53e5\u4e86\u3002
\u5171\u4eab\u6c60\u662fOracle\u4e2d\u7684\u672f\u8bed\uff0c\u5305\u62ec\u4e86\u5e93\u7f13\u5b58\uff0c\u6570\u636e\u5b57\u5178\u7f13\u51b2\u533a\u7b49\u3002\u6211\u4eec\u4e0a\u9762\u5df2\u7ecf\u8bb2\u5230\u4e86\u5e93\u7f13\u5b58\u533a\uff0c\u5b83\u4e3b\u8981\u7f13\u5b58SQL\u8bed\u53e5\u548c\u6267\u884c\u8ba1\u5212\u3002\u800c\u6570\u636e\u5b57\u5178\u7f13\u51b2\u533a\u5b58\u50a8\u7684\u662fOracle\u4e2d\u7684\u5bf9\u8c61\u5b9a\u4e49\uff0c\u6bd4\u5982\u8868\u3001\u89c6\u56fe\u3001\u7d22\u5f15\u7b49\u5bf9\u8c61\u3002\u5f53\u5bf9SQL\u8bed\u53e5\u8fdb\u884c\u89e3\u6790\u7684\u65f6\u5019\uff0c\u5982\u679c\u9700\u8981\u76f8\u5173\u7684\u6570\u636e\uff0c\u4f1a\u4ece\u6570\u636e\u5b57\u5178\u7f13\u51b2\u533a\u4e2d\u63d0\u53d6\u3002
\u5e93\u7f13\u5b58\u8fd9\u4e00\u4e2a\u6b65\u9aa4\uff0c\u51b3\u5b9a\u4e86SQL\u8bed\u53e5\u662f\u5426\u9700\u8981\u8fdb\u884c\u786c\u89e3\u6790\u3002\u4e3a\u4e86\u63d0\u5347SQL\u7684\u6267\u884c\u6548\u7387\uff0c\u6211\u4eec\u5e94\u8be5\u5c3d\u91cf\u907f\u514d\u786c\u89e3\u6790\uff0c\u56e0\u4e3a\u5728SQL\u7684\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0c\u521b\u5efa\u89e3\u6790\u6811\uff0c\u751f\u6210\u6267\u884c\u8ba1\u5212\u662f\u5f88\u6d88\u8017\u8d44\u6e90\u7684\u3002<\/p>\n\n\n\n
\u4f60\u53ef\u80fd\u4f1a\u95ee\uff0c\u5982\u4f55\u907f\u514d\u786c\u89e3\u6790\uff0c\u5c3d\u91cf\u4f7f\u7528\u8f6f\u89e3\u6790\u5462\uff1f\u5728Oracle\u4e2d\uff0c\u7ed1\u5b9a\u53d8\u91cf\u662f\u5b83\u7684\u4e00\u5927\u7279\u8272\u3002\u7ed1\u5b9a\u53d8\u91cf\u5c31\u662f\u5728SQL\u8bed\u53e5\u4e2d\u4f7f\u7528\u53d8\u91cf\uff0c\u901a\u8fc7\u4e0d\u540c\u7684\u53d8\u91cf\u53d6\u503c\u6765\u6539\u53d8SQL\u7684\u6267\u884c\u7ed3\u679c\u3002\u8fd9\u6837\u505a\u7684\u597d\u5904\u662f\u80fd\u63d0\u5347\u8f6f\u89e3\u6790\u7684\u53ef\u80fd\u6027\uff0c\u4e0d\u8db3\u4e4b\u5904\u5728\u4e8e\u53ef\u80fd\u4f1a\u5bfc\u81f4\u751f\u6210\u7684\u6267\u884c\u8ba1\u5212\u4e0d\u591f\u4f18\u5316\uff0c\u56e0\u6b64\u662f\u5426\u9700\u8981\u7ed1\u5b9a\u53d8\u91cf\u8fd8\u9700\u8981\u89c6\u60c5\u51b5\u800c\u5b9a\u3002<\/p>\n\n\n\n
\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u67e5\u8be2\u8bed\u53e5\uff1a\nSQL> select * from player where player_id = 10001;\n\u4f60\u4e5f\u53ef\u4ee5\u4f7f\u7528\u7ed1\u5b9a\u53d8\u91cf\uff0c\u5982\uff1a\nSQL> select * from player where player_id =:playdr_id;\n\n\u8fd9\u4e24\u4e2a\u67e5\u8be2\u8bed\u53e5\u7684\u6548\u7387\u5728Oracle\u4e2d\u662f\u5b8c\u5168\u4e0d\u540c\u7684\u3002\u5982\u679c\u4f60\u5728\u67e5\u8be2player_id=10001\u4e4b\u540e\uff0c\u8fd8\u4f1a\u67e5\u8be2\n10002\u300110003\u4e4b\u7c7b\u7684\u6570\u636e\uff0c\u90a3\u4e48\u6bcf\u4e00\u6b21\u67e5\u8be2\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u67e5\u8be2\u89e3\u6790\u3002\u800c\u7b2c\u4e8c\u79cd\u65b9\u5f0f\u4f7f\u7528\u4e86\u7ed1\u5b9a\n\u53d8\u91cf\uff0c\u90a3\u4e48\u5728\u7b2c\u4e00\u6b21\u67e5\u8be2\u4e4b\u540e\uff0c\u5728\u5171\u4eab\u6c60\u4e2d\u5c31\u4f1a\u5b58\u5728\u8fd9\u7c7b\u67e5\u8be2\u7684\u6267\u884c\u8ba1\u5212\uff0c\u4e5f\u5c31\u662f\u8f6f\u89e3\u6790\u3002\n\n\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u7ed1\u5b9a\u53d8\u91cf\u6765\u51cf\u5c11\u786c\u89e3\u6790\uff0c\u51cf\u5c11Oracle\u7684\u89e3\u6790\u5de5\u4f5c\u91cf\u3002\u4f46\u662f\u8fd9\u79cd\u65b9\u5f0f\u4e5f\u6709\n\u7f3a\u70b9\uff0c\u4f7f\u7528\u52a8\u6001SQL\u7684\u65b9\u5f0f\uff0c\u56e0\u4e3a\u53c2\u6570\u4e0d\u540c\uff0c\u4f1a\u5bfc\u81f4SQL\u7684\u6267\u884c\u6548\u7387\u4e0d\u540c\uff0c\u540c\u65f6SQL\u4f18\u5316\u4e5f\u4f1a\u6bd4\u8f83\u56f0\u96be\u3002<\/code><\/pre>\n\n\n\n
3.  \u6570\u636e\u5e93\u7f13\u51b2\u6c60\uff08bufferpool)<\/h2>\n\n\n\n
InnoDB \u5b58\u50a8\u5f15\u64ce\u662f\u4ee5\u9875\u4e3a\u5355\u4f4d\u6765\u7ba1\u7406\u5b58\u50a8\u7a7a\u95f4\u7684\uff0c\u6211\u4eec\u8fdb\u884c\u7684\u589e\u5220\u6539\u67e5\u64cd\u4f5c\u5176\u5b9e\u672c\u8d28\u4e0a\u90fd\u662f\u5728\u8bbf\u95ee\u9875 \u9762\uff08\u5305\u62ec\u8bfb\u9875\u9762\u3001\u5199\u9875\u9762\u3001\u521b\u5efa\u65b0\u9875\u9762\u7b49\u64cd\u4f5c\uff09\u3002\u800c\u78c1\u76d8 I\/O \u9700\u8981\u6d88\u8017\u7684\u65f6\u95f4\u5f88\u591a\uff0c\u800c\u5728\u5185\u5b58\u4e2d\u8fdb\u884c\u64cd\u4f5c\uff0c\u6548\u7387\u5219\u4f1a\u9ad8\u5f88\u591a\uff0c\u4e3a\u4e86\u80fd\u8ba9\u6570\u636e\u8868\u6216\u8005\u7d22\u5f15\u4e2d\u7684\u6570\u636e\u968f\u65f6\u88ab\u6211\u4eec\u6240\u7528\uff0cDBMS \u4f1a\u7533\u8bf7 \u5360\u7528\u5185\u5b58\u6765\u4f5c\u4e3a \u6570\u636e\u7f13\u51b2\u6c60\uff0c\u5728\u771f\u6b63\u8bbf\u95ee\u9875\u9762\u4e4b\u524d\uff0c\u9700\u8981\u628a\u5728\u78c1\u76d8\u4e0a\u7684\u9875\u7f13\u5b58\u5230\u5185\u5b58\u4e2d\u7684 \u95ee\u3002<\/p>\n\n\n\n
Buffer Pool \u4e4b\u540e\u624d\u53ef\u4ee5\u8bbf \u8fd9\u6837\u505a\u7684\u597d\u5904\u662f\u53ef\u4ee5\u8ba9\u78c1\u76d8\u6d3b\u52a8\u6700\u5c0f\u5316\uff0c\u4ece\u800c \u51cf\u5c11\u4e0e\u78c1\u76d8\u76f4\u63a5\u8fdb\u884c I\/O \u7684\u65f6\u95f4\u3002\u8981\u77e5\u9053\uff0c\u8fd9\u79cd\u7b56\u7565\u5bf9\u63d0 \u5347 SQL \u8bed\u53e5\u7684\u67e5\u8be2\u6027\u80fd\u6765\u8bf4\u81f3\u5173\u91cd\u8981\u3002\u5982\u679c\u7d22\u5f15\u7684\u6570\u636e\u5728\u7f13\u51b2\u6c60\u91cc\uff0c\u90a3\u4e48\u8bbf\u95ee\u7684\u6210\u672c\u5c31\u4f1a\u964d\u4f4e\u5f88\u591a\u3002<\/p>\n\n\n\n
3.1 \u7f13\u51b2\u6c60 vs \u67e5\u8be2\u7f13\u5b58<\/h3>\n\n\n\n
\u7f13\u51b2\u6c60\u548c\u67e5\u8be2\u7f13\u5b58\u662f\u4e00\u4e2a\u4e1c\u897f\u5417\uff1f\u4e0d\u662f\u3002<\/p>\n\n\n\n
1. \u7f13\u51b2\u6c60\uff08Buffer Pool\uff09<\/h4>\n\n\n\n
\u9996\u5148\u6211\u4eec\u9700\u8981\u4e86\u89e3\u5728 InnoDB \u5b58\u50a8\u5f15\u64ce\u4e2d\uff0c\u7f13\u51b2\u6c60\u90fd\u5305\u62ec\u4e86\u54ea\u4e9b\u3002 \u5728 InnoDB \u5b58\u50a8\u5f15\u64ce\u4e2d\u6709\u4e00\u90e8\u5206\u6570\u636e\u4f1a\u653e\u5230\u5185\u5b58\u4e2d\uff0c\u7f13\u51b2\u6c60\u5219\u5360\u4e86\u8fd9\u90e8\u5206\u5185\u5b58\u7684\u5927\u90e8\u5206\uff0c\u5b83\u7528\u6765\u5b58\u50a8\u5404\u79cd\u6570\u636e\u7684\u7f13\u5b58\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a\"\"<\/p>\n\n\n\n
\u4e00\u4e2a\u6570\u636e\u9875\u7684\u5927\u5c0f\u662f16kb<\/p>\n\n\n\n
\u5bf9\u4e8e\u4f7f\u7528InnoDB\u4f5c\u4e3a\u5b58\u50a8\u5f15\u64ce\u7684\u8868\u6765\u8bf4\uff0c\u4e0d\u7ba1\u662f\u7528\u4e8e\u5b58\u50a8\u7528\u6237\u6570\u636e\u7684\u7d22\u5f15\u5382\uff08\u5305\u62ec\u805a\u7c07\u7d22\u5f15\u548c\u4e8c\u7ea7\u7d22\u5f15\uff09\uff0c\u8fd8\u662f\u5404\u79cd\u7cfb\u7edf\u6570\u636e\uff0c\u90fd\u662f\u4ee5\u9875\u7684\u5f62\u5f0f\u5b58\u653e\u5728\u8868\u7a7a\u95f4\u4e2d\u7684\uff0c\u800c\u6240\u8c13\u7684\u8868\u7a7a\u95f4\u53ea\u4e0d\u8fc7\u662flnnoDB\u5bf9\u6587\u4ef6\u7cfb\u7edf\u4e0a\u4e00\u4e2a\u6216\u51e0\u4e2a\u5b9e\u9645\u6587\u4ef6\u7684\u62bd\u8c61\uff0c\u4e5f\u5c31\u662f\u8bf4\u6211\u4eec\u7684\u6570\u636e\u8bf4\u5230\u5e95\u8fd8\u662f\u5b58\u50a8\u5728\u78c1\u76d8\u4e0a\u7684\u3002\u4f46\u662f\u5404\u4f4d\u4e5f\u90fd\u77e5\u9053\uff0c\u78c1\u76d8\u7684\u901f\u5ea6\u6162\u7684\u8ddf\u4e4c\u9f9f\u4e00\u6837\uff0c\u600e\u4e48\u80fd\u914d\u5f97\u4e0a\u201c\u5feb\u5982\u98ce\uff0c\u75be\u5982\u7535\u201d\u7684CPU\u5462\uff1f\u8fd9\u91cc\uff0c\u7f13\u51b2\u6c60\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u6d88\u9664CPU\u548c\u78c1\u76d8\u4e4b\u95f4\u7684\u9e3f\u6c9f\u3002\u6240\u4ee5InnoDB\u5b58\u50a8\u5f15\u64ce\u5728\u5904\u7406\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u65f6\uff0c\u5f53\u9700\u8981\u8bbf\u95ee\u67d0\u4e2a\u9875\u7684\u6570\u636e\u65f6\uff0c\u5c31\u4f1a\u628a\u5b8c\u6574\u7684\u9875\u7684\u6570\u636e\u5168\u90e8\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d
\u4e5f\u5c31\u662f\u8bf4\u5373\u4f7f\u6211\u4eec\u53ea\u9700\u8981\u8bbf\u95ee\u4e00\u4e2a\u9875\u7684\u4e00\u6761\u8bb0\u5f55\uff0c\u90a3\u4e5f\u9700\u8981\u5148\u628a\u6574\u4e2a\u9875\u7684\u6570\u636e\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\u3002\u5c06\u4e2a\u9875\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\u540e\u5c31\u53ef\u4ee5\u8fdb\u884c\u8bfb\u5199\u8bbf\u95ee\u4e86\uff0c\u5728\u8fdb\u884c\u5b8c\u8bfb\u5199\u8bbf\u95ee\u4e4b\u540e\u5e76\u4e0d\u7740\u6025\u628a\u8be5\u9875\u5bf9\u5e94\u7684\u5185\u5b58\u7a7a\u95f4\u91ca\u653e\u6389\uff0c\u800c\u662f\u5c06\u5176\u7f13\u5b58\u8d77\u6765\uff0c\u8fd9\u6837\u5c06\u6765\u6709\u8bf7\u6c42\u518d\u6b21\u8bbf\u95ee\u8be5\u9875\u9762\u65f6\uff0c\u5c31\u53ef\u4ee5\u7701\u53bb\u78c1\u76d8io\u7684\u5f00\u9500\u4e86\u3002<\/p>\n\n\n\n
 \u201c\u4f4d\u7f6e*\u9891\u6b21\"\u8fd9\u4e2a\u539f\u5219\uff0c\u53ef\u4ee5\u5e2e\u6211\u4eec\u5bf9I\/0\u8bbf\u95ee\u6548\u7387\u8fdb\u884c\u4f18\u5316\u3002
\u9996\u5148\uff0c\u4f4d\u7f6e\u51b3\u5b9a\u6548\u7387\uff0c\u63d0\u4f9b\u7f13\u51b2\u6c60\u5c31\u662f\u4e3a\u4e86\u5728\u5185\u5b58\u4e2d\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u6570\u636e\u3002
\u5176\u6b21\uff0c\u9891\u6b21\u51b3\u5b9a\u4f18\u5148\u7ea7\u987a\u5e8f\u3002\u56e0\u4e3a\u7f13\u51b2\u6c60\u7684\u5927\u5c0f\u662f\u6709\u9650\u7684\uff0c\u6bd4\u5982\u78c1\u76d8\u6709200G\uff0c\u4f46\u662f\u5185\u5b58\u53ea\u670916G\uff0c\u7f13\u51b2\u6c60\u5927\u5c0f\u53ea\u67091G\uff0c\u5c31\u65e0\u6cd5\u5c06\u6240\u6709\u6570\u636e\u90fd\u52a0\u8f7d\u5230\u7f13\u51b2\u6c60\u91cc\uff0c\u8fd9\u65f6\u5c31\u6d89\u53ca\u5230\u4f18\u5148\u7ea7\u987a\u5e8f\uff0c\u4f1a\u4f18\u5148\u5bf9\u4f7f\u7528\u9891\u6b21\u9ad8\u7684\u70ed\u6570\u636e\u8fdb\u884c\u52a0\u8f7d\u3002<\/p>\n\n\n\n
\u7f13\u51b2\u6c60\u7684\u9884\u8bfb\u7279\u6027\uff1a
\u4e86\u89e3\u4e86\u7f13\u51b2\u6c60\u7684\u4f5c\u7528\u4e4b\u540e\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u4e86\u89e3\u7f13\u51b2\u6c60\u7684\u53e6\u4e00\u4e2a\u7279\u6027\uff1a\u9884\u8bfb\u3002
\u7f13\u51b2\u6c60\u7684\u4f5c\u7528\u5c31\u662f\u63d0\u53471\/0\u6548\u7387\uff0c\u800c\u6211\u4eec\u8fdb\u884c\u8bfb\u53d6\u6570\u636e\u7684\u65f6\u5019\u5b58\u5728\u4e00\u4e2a\u201c\u5c40\u90e8\u6027\u539f\u7406\u201d\uff0c\u4e5f\u5c31\u662f\u8bf4\u6211\u4eec\u4f7f\u7528\u4e86\u4e00\u4e9b\u6570\u636e\uff0c\u5927\u6982\u7387\u8fd8\u4f1a\u4f7f\u7528\u5b83\u5468\u56f4\u7684\u4e00\u4e9b\u6570\u636e\uff0c\u56e0\u6b64\u91c7\u7528\u201c\u9884\u8bfb\"\u7684\u673a\u5236\u63d0\u524d\u52a0\u8f7d\uff0c\u53ef\u4ee5\u51cf\u5c11\u672a\u6765\u53ef\u80fd\u7684\u78c1\u76d8io\u64cd\u4f5c\u3002<\/p>\n\n\n\n
2. \u67e5\u8be2\u7f13\u5b58<\/h4>\n\n\n\n
\u90a3\u4e48\u4ec0\u4e48\u662f\u67e5\u8be2\u7f13\u5b58\u5462\uff1f \u67e5\u8be2\u7f13\u5b58\u662f\u63d0\u524d\u628a \u67e5\u8be2\u7ed3\u679c\u7f13\u5b58\u8d77\u6765\uff0c\u8fd9\u6837\u4e0b\u6b21\u4e0d\u9700\u8981\u6267\u884c\u5c31\u53ef\u4ee5\u76f4\u63a5\u62ff\u5230\u7ed3\u679c\u3002\u9700\u8981\u8bf4\u660e\u7684\u662f\uff0c\u5728 MySQL \u4e2d\u7684\u67e5\u8be2\u7f13\u5b58\uff0c\u4e0d\u662f\u7f13\u5b58\u67e5\u8be2\u8ba1\u5212\uff0c\u800c\u662f\u67e5\u8be2\u5bf9\u5e94\u7684\u7ed3\u679c\u3002\u56e0\u4e3a\u547d\u4e2d\u6761\u4ef6\u82db\u523b\uff0c\u800c\u4e14\u53ea\u8981\u6570\u636e\u8868 \u53d1\u751f\u53d8\u5316\uff0c\u67e5\u8be2\u7f13\u5b58\u5c31\u4f1a\u5931\u6548\uff0c\u56e0\u6b64\u547d\u4e2d\u7387\u4f4e\u3002 <\/p>\n\n\n\n
3.2\u7f13\u51b2\u6c60\u5982\u4f55\u8bfb\u53d6\u6570\u636e<\/h3>\n\n\n\n
\u7f13\u51b2\u6c60\u7ba1\u7406\u5668\u4f1a\u5c3d\u91cf\u5c06\u7ecf\u5e38\u4f7f\u7528\u7684\u6570\u636e\u4fdd\u5b58\u8d77\u6765\uff0c\u5728\u6570\u636e\u5e93\u8fdb\u884c\u9875\u9762\u8bfb\u64cd\u4f5c\u7684\u65f6\u5019\uff0c\u9996\u5148\u4f1a\u5224\u65ad\u8be5\u9875\u9762\u662f\u5426\u5728\u7f13\u51b2\u6c60\u4e2d\uff0c\u5982\u679c\u5b58\u5728\u5c31\u76f4\u63a5\u8bfb\u53d6\uff0c\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5c31\u4f1a\u901a\u8fc7\u5185\u5b58\u6216\u78c1\u76d8\u5c06\u9875\u9762\u5b58\u653e\u5230\u7f13\u51b2\u6c60\u4e2d\u518d\u8fdb\u884c\u8bfb\u53d6\u3002
\u7f13\u5b58\u5728\u6570\u636e\u5e93\u4e2d\u7684\u7ed3\u6784\u548c\u4f5c\u7528\u5982\u4e0b\u56fe\u6240\u793a\uff1a\"\"<\/p>\n\n\n\n
\u5b9e\u9645\u4e0a\uff0c\u5f53\u6211\u4eec\u5bf9\u6570\u636e\u5e93\u4e2d\u7684\u8bb0\u5f55\u8fdb\u884c\u4fee\u6539\u7684\u65f6\u5019\uff0c\u9996\u5148\u4f1a\u4fee\u6539\u7f13\u51b2\u6c60\u4e2d\u9875\u91cc\u9762\u7684\u8bb0\u5f55\u4fe1\u606f\uff0c\u7136\u540e\u6570\u636e\u5e93\u4f1a\u4ee5\u4e00\u5b9a\u7684\u9891\u7387\u5237\u65b0\u5230\u78c1\u76d8\u4e0a\u3002\u6ce8\u610f\u5e76\u4e0d\u662f\u6bcf\u6b21\u53d1\u751f\u66f4\u65b0\u64cd\u4f5c\uff0c\u90fd\u4f1a\u7acb\u523b\u8fdb\u884c\u78c1\u76d8\u56de\u5199\u3002\u7f13\u51b2\u6c60\u4f1a\u91c7\u7528\u4e00\u79cd\u53eb\u505acheckpoint\u7684\u673a\u5236\u5c06\u6570\u636e\u56de\u5199\u5230\u78c1\u76d8\u4e0a\uff0c\u8fd9\u6837\u505a\u7684\u597d\u5904\u5c31\u662f\u63d0\u5347\u4e86\u6570\u636e\u5e93\u7684\u6574\u4f53\u6027\u80fd\u3002 <\/p>\n\n\n\n
3.3\u67e5\u770b\/\u8bbe\u7f6e\u7f13\u51b2\u6c60\u7684\u5927\u5c0f<\/h3>\n\n\n\n
\u5982\u679c\u4f60\u4f7f\u7528\u7684\u662fMySQLMyISAM\u5b58\u50a8\u5f15\u5f15\u64ce\uff0c\u5b83\u53ea\u7f13\u5b58\u7d22\u5f15l\uff0c\u4e0d\u7f13\u5b58\u6570\u636e\uff0c\u5bf9\u5e94\u7684\u952e\u7f13\u5b58\u53c2\u6570\u4e3a
key_buffer_size\uff0c\u4f60\u53ef\u4ee5\u7528\u5b83\u8fdb\u884c\u67e5\u770b\u3002<\/p>\n\n\n\n
\u5982\u679c\u4f60\u4f7f\u7528\u7684\u662fInnoDB\u5b58\u50a8\u5f15\u64ce\uff0c\u53ef\u4ee5\u901a\u8fc7\u67e5\u770b\u770binnodb_buffer_pool_size\u53d8\u91cf\u6765\u67e5\u770b\u7f13\u51b2\u6c60\u7684\u6728\u5c0f\u3002\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n
show variables like 'innodb_buffer_pool_size';<\/code><\/pre>\n\n\n\n
\u4f60\u80fd\u770b\u5230\u6b64\u65f6InnoDB\u7684\u7f13\u51b2\u6c60\u5927\u5c0f\u53ea\u6709134217728\/1024\/1024=128MB\u3002\u6211\u4eec\u53ef\u4ee5\u4fee\u6539\u7f13\u51b2\u6c60\u5927\u5c0f\uff0c\u6bd4\u5982\u6539\u4e3a256MB\uff0c\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n\n
set global innodb_buffer_pool_size = 268435456;<\/code><\/pre>\n\n\n\n
3.4\u591a\u4e2aBufferPool\u5b9e\u4f8b<\/h3>\n\n\n\n
BufferPool\u672c\u8d28\u662fInnoDB\u5411\u64cd\u4f5c\u7cfb\u7edf\u7533\u8bf7\u7684\u4e00\u5757\u8fde\u7eed\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\uff0c\u8bbf\u95eeBufferPool\u4e2d\u7684\u6570\u636e\u90fd\u9700\u8981\u52a0\u9501\u5904\u7406\u3002\u5728BuferPool\u7279\u522b\u5927\u800c\u4e14\u591a\u7ebf\u7a0b\u5e76\u53d1\u8bbf\u95ee\u7279\u522b\u9ad8\u7684\u60c5\u51b5\u4e0b\uff0c\u5355\u4e00\u7684BufferPool\u53ef\u80fd\u4f1a\u5f71\u54cd\u8bf7\u6c42\u7684\u5904\u7406\u901f\u5ea6\u3002\u6240\u4ee5\u5728BufferPool\u7279\u522b\u5927\u7684\u65f6\u5019\uff0c\u6211\u4eec\u53ef\u4ee5\u628a\u5b83\u4eec\u62c6\u5206\u6210\u82e5\u5e72\u4e2a\u5c0f\u7684BufferPool\uff0c\u6bcf\u4e2aBufferPool\u90fd\u79f0\u4e3a\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u5b83\u4eec\u90fd\u662f\u72ec\u7acb\u7684\uff0c\u72ec\u7acb\u7684\u53bb\u7533\u8bf7\u5185\u5b58\u7a7a\u95f4\uff0c\u72ec\u7acb\u7684\u7ba1\u7406\u5404\u79cd\u94fe\u8868\u3002\u6240\u4ee5\u5728\u591a\u7ebf\u7a0b\u5e76\u53d1\u8bbf\u95ee\u65f6\u5e76\u4e0d\u4f1a\u76f8\u4e92\u5f71\u54cd\uff0c\u4ece\u800c\u63d0\u9ad8\u5e76\u53d1\u5904\u7406\u80fd\u529b\u3002
\u6211\u4eec\u53ef\u4ee5\u5728\u670d\u52a1\u5668\u542f\u52a8\u7684\u65f6\u5019\u901a\u8fc7\u8bbe\u7f6einnodb_buffer_pool_instances\u7684\u503c\u6765\u4fee\u6539BufferPool\u5b9e\u4f8b\u7684\u4e2a\u6570\uff0c\u6bd4\u65b9\u8bf4\u8fd9\u6837\uff1a<\/p>\n\n\n\n
show variables like 'innodb_buffer_pool_instances';\u53ef\u4ee5\u627e\u5230\u73b0\u5728pool\u662f\u591a\u5c11<\/code><\/pre>\n\n\n
[server]<\/p>\n\n\n\n
innodb_buffer_pool_instances = 2 #\u8fd9\u6837\u5c31\u8868\u660e\u6211\u4eec\u8981\u521b\u5efa2\u4e2aBufferPool\u5b9e\u4f8b\u3002<\/p>\n\n\n\n
 \u90a3\u6bcf\u4e2aBufferPool\u5b9e\u4f8b\u5b9e\u9645\u5360\u591a\u5c11\u5185\u5b58\u7a7a\u95f4\u5462\uff1f\u5176\u5b9e\u4f7f\u7528\u8fd9\u4e2a\u516c\u5f0f\u7b97\u51fa\u6765\u7684\uff1a
innodb_buffer_pool_size\/innodb_buffer_pool_instances
\u4e5f\u5c31\u662f\u603b\u5171\u7684\u5927\u5c0f\u9664\u4ee5\u5b9e\u4f8b\u7684\u4e2a\u6570\uff0c\u7ed3\u679c\u5c31\u662f\u6bcf\u4e2aBufferPool\u5b9e\u4f8b\u5360\u7528\u7684\u5927\u5c0f\u3002<\/p>\n\n\n\n
 3.5\u5f15\u7533\u95ee\u9898<\/h3>\n\n\n\n
BufferPool\u662fMySQL\u5185\u5b58\u7ed3\u6784\u4e2d\u5341\u5206\u6838\u5fc3\u7684\u4e00\u4e2a\u7ec4\u6210\uff0c\u4f60\u53ef\u4ee5\u5148\u628a\u5b83\u60f3\u8c61\u6210\u4e00\u4e2a\u9ed1\u76d2\u5b50\u3002<\/p>\n\n\n\n
\"\"<\/p>\n\n\n\n
 \u8fd9\u4e2a\u8fc7\u7a0b\u770b\u4f3c\u6ca1\u5565\u95ee\u9898\uff0c\u5b9e\u5219\u662f\u6709\u95ee\u9898\u7684\u3002\u5047\u8bbe\u6211\u4eec\u4fee\u6539BufferPool\u4e2d\u7684\u6570\u636e\u6210\u529f\uff0c\u4f46\u662f\u8fd8\u6ca1\u6765\u5f97\u53ca\u5c06\u6570\u636e\u5237\u5165\u78c1\u76d8MySQL\u5c31\u6302\u4e86\u600e\u4e48\u529e\uff1f\u6309\u7167\u4e0a\u56fe\u7684\u903b\u8f91\uff0c\u6b64\u65f6\u66f4\u65b0\u4e4b\u540e\u7684\u6570\u636e\u53ea\u5b58\u5728\u4e8eBufferPool\u4e2d\uff0c\u5982\u679c\u6b64\u65f6MySQL\u5ca9\u673a\u4e86\uff0c\u8fd9\u90e8\u5206\u6570\u636e\u5c06\u4f1a\u6c38\u4e45\u5730\u4e22\u5931\uff1b
\u518d\u8005\uff0c\u6211\u66f4\u65b0\u5230\u4e00\u534a\u7a81\u7136\u53d1\u751f\u9519\u8bef\u4e86\uff0c\u60f3\u8981\u56de\u6eda\u5230\u66f4\u65b0\u4e4b\u524d\u7684\u7248\u672c\uff0c\u8be5\u600e\u4e48\u529e\uff1f\u8fde\u6570\u636e\u6301\u4e45\u5316\u7684\u4fdd\u8bc1\u3001\u4e8b\u52a1\u56de\u6eda\u90fd\u505a\u4e0d\u5230\u8fd8\u8c08\u4ec0\u4e48\u5d29\u6e83\u6062\u590d\uff1f
\u7b54\u6848\uff1aRedoLog&UndoLog<\/strong> \u200b<\/p>\n","protected":false},"excerpt":{"rendered":"
 \u7b2c04\u7ae0_\u903b\u8f91\u67b6\u6784 1. \u903b\u8f91\u67b6\u6784\u5256\u6790 \u9996\u5148MySQL\u662f\u5178\u578b\u7684C\/S\u67b6\u6784\uff0c\u5373Client\/Server\u67b6\u6784\uff0c\u670d\u52a1\u5668\u7aef\u7a0b …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[2],"tags":[16],"class_list":["post-894","post","type-post","status-publish","format-standard","hentry","category-2","tag-sql"],"_links":{"self":[{"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/posts\/894","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/eve2333.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=894"}],"version-history":[{"count":1,"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/posts\/894\/revisions"}],"predecessor-version":[{"id":896,"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/posts\/894\/revisions\/896"}],"wp:attachment":[{"href":"https:\/\/eve2333.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=894"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/eve2333.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=894"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/eve2333.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=894"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}