{"id":324,"date":"2012-08-18T15:22:46","date_gmt":"2012-08-18T15:22:46","guid":{"rendered":"http:\/\/blog.zhukunqian.com\/?p=324"},"modified":"2012-08-18T15:23:45","modified_gmt":"2012-08-18T15:23:45","slug":"mysql-db%e4%bc%98%e5%8c%96","status":"publish","type":"post","link":"https:\/\/blog.zhukunqian.com\/?p=324","title":{"rendered":"mysql db\u4f18\u5316"},"content":{"rendered":"
\n
\n

1. \u7b80\u4ecb<\/p>\n

\u5728Web\u5e94\u7528\u7a0b\u5e8f\u4f53\u7cfb\u67b6\u6784\u4e2d\uff0c\u6570\u636e\u6301\u4e45\u5c42\uff08\u901a\u5e38\u662f\u4e00\u4e2a\u5173\u7cfb\u6570\u636e\u5e93\uff09\u662f\u8981\u5bb3\u7684\u6838\u5fc3\u90e8\u5206\uff0c\u5b83\u5bf9\u7cfb \u7edf\u7684\u6027\u80fd\u6709\u975e\u5e38\u91cd\u8981\u7684\u5f71\u54cd\u3002MySQL\u662f\u76ee\u524d\u4f7f\u7528\u6700\u591a\u7684\u5f00\u6e90\u6570\u636e\u5e93\uff0c\u4f46\u662fMySQL\u6570\u636e\u5e93\u7684\u9ed8\u8ba4\u8bbe\u7f6e\u6027\u80fd\u975e\u5e38\u7684\u5dee\uff0c\u4ec5\u4ec5\u662f\u4e00\u4e2a\u73a9\u5177\u6570\u636e\u5e93\u3002\u56e0\u6b64\u5728\u4ea7\u54c1\u4e2d\u4f7f \u7528MySQL\u6570\u636e\u5e93\u5fc5\u987b\u8fdb\u884c\u5fc5\u8981\u7684\u4f18\u5316\u3002<\/p>\n

\u4f18\u5316\u662f\u4e00\u4e2a\u590d\u6742\u7684\u4efb\u52a1\uff0c\u672c\u6587\u63cf\u8ff0MySQL\u76f8\u5173\u7684\u6570\u636e\u5e93\u8bbe\u8ba1\u548c\u67e5\u8be2\u4f18\u5316\uff0c\u670d\u52a1\u5668\u7aef\u4f18\u5316\uff0c\u5b58\u50a8\u5f15\u64ce\u4f18\u5316\u3002<\/p>\n

2. \u6570\u636e\u5e93\u8bbe\u8ba1\u548c\u67e5\u8be2\u4f18\u5316<\/p>\n

\u5728MySQL Server\u6027\u80fd\u8c03\u4f18\u4e2d\uff0c\u9996\u5148\u8981\u8003\u8651\u7684\u5c31\u662fDatabase Schema\u8bbe\u8ba1\uff0c\u8fd9\u4e00\u70b9\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4e00\u4e2a\u7cdf\u7cd5\u7684Schema\u8bbe\u8ba1\u5373\u4f7f\u5728\u6027\u80fd\u8c03\u4f18\u7684MySQL Server\u4e0a\u8fd0\u884c\uff0c\u4e5f\u4f1a\u8868\u73b0\u51fa\u5f88\u5dee\u7684\u6027\u80fd\uff1b\u548cSchema\u76f8\u4f3c\uff0c\u67e5\u8be2\u8bed\u53e5\u7684\u8bbe\u8ba1\u4e5f\u4f1a\u5f71\u54cdMySQL\u7684\u6027\u80fd\uff0c\u5e94\u8be5\u907f\u514d\u5199\u51fa\u4f4e\u6548\u7684SQL\u67e5\u8be2\u3002\u8fd9\u4e00\u8282\u5c06\u5177\u4f53 \u8ba8\u8bba\u8fd9\u4e24\u65b9\u9762\u7684\u4f18\u5316\u3002<\/p>\n

2.1 Schema Design<\/p>\n

Schema\u7684\u4f18\u5316\u53d6\u51b3\u4e8e\u5c06\u8981\u8fd0\u884c\u4ec0\u4e48\u6837\u7684query\uff0c\u4e0d\u540c\u7684query\u4f1a\u6709\u4e0d\u540c\u7684Schema\u4f18\u5316\u65b9\u6848\u30022.2\u8282\u5c06\u4ecb\u7ecdQuery Design\u7684\u4f18\u5316\u3002Schema\u8bbe\u8ba1\u540c\u6837\u53d7\u5230\u9884\u671f\u6570\u636e\u96c6\u5927\u5c0f\u7684\u5f71\u54cd\u3002Schema\u8bbe\u8ba1\u65f6\u4e3b\u8981\u8003\u8651\uff1a\u6807\u51c6\u5316\uff0c\u6570\u636e\u7c7b\u578b\uff0c\u7d22\u5f15\u3002<\/p>\n

2.1.1 \u6807\u51c6\u5316<\/p>\n

\u6807\u51c6\u5316\u662f\u5728\u6570\u636e\u5e93\u4e2d\u7ec4\u7ec7\u6570\u636e\u7684\u8fc7\u7a0b\u3002\u5176\u4e2d\u5305\u62ec\uff0c\u6839\u636e\u8bbe\u8ba1\u89c4\u5219\u521b\u5efa\u8868\u5e76\u5728\u8fd9\u4e9b\u8868\u95f4\u5efa\u7acb\u5173\u7cfb\uff1b\u901a \u8fc7\u53d6\u6d88\u5197\u4f59\u5ea6\u4e0e\u4e0d\u4e00\u81f4\u76f8\u5173\u6027\uff0c\u8be5\u8bbe\u8ba1\u89c4\u5219\u53ef\u4ee5\u540c\u65f6\u4fdd\u62a4\u6570\u636e\u5e76\u63d0\u9ad8\u6570\u636e\u7684\u7075\u6d3b\u6027\u3002\u901a\u5e38\u6570\u636e\u5e93\u6807\u51c6\u5316\u662f\u8ba9\u6570\u636e\u5e93\u8bbe\u8ba1\u7b26\u5408\u67d0\u4e00\u7ea7\u522b\u7684\u8303\u5f0f\uff0c\u901a\u5e38\u6ee1\u8db3\u7b2c\u4e09\u8303\u5f0f\u5373 \u53ef\u3002\u4e5f\u6709\u7b2c\u56db\u8303\u5f0f\uff08\u4e5f\u79f0\u4e3a Boyce Codd\u8303\u5f0f\uff0cBCNF)\uff09\u4e0e\u7b2c\u4e94\u8303\u5f0f\u5b58\u5728\uff0c\u4f46\u662f\u5728\u5b9e\u9645\u8bbe\u8ba1\u4e2d\u5f88\u5c11\u8003\u8651\u3002\u5ffd\u89c6\u8fd9\u4e9b\u89c4\u5219\u53ef\u80fd\u4f7f\u5f97\u6570\u636e\u5e93\u7684\u8bbe\u8ba1\u4e0d\u592a\u5b8c\u7f8e\uff0c\u4f46\u8fd9\u4e0d\u5e94\u5f71\u54cd\u529f\u80fd\u3002<\/p>\n

\u6807\u51c6\u5316\u7684\u7279\u70b9\uff1a<\/p>\n

1) \u6240\u6709\u7684\u201c\u5bf9\u8c61\u201d\u90fd\u5728\u5b83\u81ea\u5df1\u7684table\u4e2d\uff0c\u6ca1\u6709\u5197\u4f59\u30022) \u6570\u636e\u5e93\u901a\u5e38\u7531E-R\u56fe\u751f\u6210\u3002<\/p>\n

3) \u7b80\u6d01\uff0c\u66f4\u65b0\u5c5e\u6027\u901a\u5e38\u53ea\u9700\u8981\u66f4\u65b0\u5f88\u5c11\u7684\u8bb0\u5f55\u3002<\/p>\n

4) Join\u64cd\u4f5c\u6bd4\u8f83\u8017\u65f6\u3002<\/p>\n

5) Select\uff0csort\u4f18\u5316\u63aa\u65bd\u6bd4\u8f83\u5c11\u3002<\/p>\n

6) \u9002\u7528\u4e8eOLTP\u5e94\u7528\u3002<\/p><\/blockquote>\n

\u975e\u6807\u51c6\u5316\u7684\u7279\u70b9\uff1a<\/p>\n

1) \u5728\u4e00\u5f20\u8868\u4e2d\u5b58\u50a8\u5f88\u591a\u6570\u636e\uff0c\u6570\u636e\u5197\u4f59\u30022) \u66f4\u65b0\u6570\u636e\u5f00\u9500\u5f88\u5927\uff0c\u66f4\u65b0\u4e00\u4e2a\u5c5e\u6027\u53ef\u80fd\u4f1a\u66f4\u65b0\u5f88\u591a\u8868\uff0c\u5f88\u591a\u8bb0\u5f55\u3002<\/p>\n

3) \u5728\u5220\u9664\u6570\u636e\u662f\u6709\u53ef\u80fd\u4e22\u5931\u6570\u636e\u3002<\/p>\n

4) Select\uff0corder\u6709\u5f88\u591a\u4f18\u5316\u7684\u9009\u62e9\u3002<\/p>\n

5) \u9002\u7528\u4e8eDSS\u5e94\u7528\u3002<\/p><\/blockquote>\n

\u6807\u51c6\u5316\u548c\u975e\u6807\u51c6\u5316\u90fd\u6709\u5404\u81ea\u7684\u4f18\u7f3a\u70b9\uff0c\u901a\u5e38\u5728\u4e00\u4e2a\u6570\u636e\u5e93\u8bbe\u8ba1\u4e2d\u53ef\u4ee5\u6df7\u5408\u4f7f\u7528\uff0c\u4e00\u90e8\u5206\u8868\u683c\u6807\u51c6\u5316\uff0c\u4e00\u90e8\u5206\u8868\u683c\u4fdd\u7559\u4e00\u4e9b\u5197\u4f59\u6570\u636e\uff1a<\/p>\n

1) \u5bf9OLTP\u4f7f\u7528\u6807\u51c6\u5316\uff0c\u5bf9DSS\u4f7f\u7528\u975e\u6807\u51c6\u53162) \u4f7f\u7528\u7269\u5316\u89c6\u56fe\u3002MySQL\u4e0d\u76f4\u63a5\u652f\u6301\u8be5\u6570\u636e\u5e93\u7279\u6027\uff0c\u4f46\u662f\u53ef\u4ee5\u7528MyISAM\u8868\u4ee3\u66ff\u3002<\/p>\n

3) \u5197\u4f59\u4e00\u4e9b\u6570\u636e\u5728\u8868\u683c\u4e2d\uff0c\u4f8b\u5982\u5c06ref_id\u548cname\u5b58\u5728\u540c\u4e00\u5f20\u8868\u4e2d\u3002\u4f46\u662f\u8981\u6ce8\u91cd\u66f4\u65b0\u95ee\u9898\u3002<\/p>\n

4) \u5bf9\u4e8e\u4e00\u4e9b\u7b80\u5355\u7684\u5bf9\u8c61\uff0c\u76f4\u63a5\u4f7f\u7528value\u4f5c\u4e3a\u5efa\u3002\u4f8b\u5982IP address\u7b49<\/p>\n

5) Reference by PRIMARY\/UNIQUE KEY\u3002MySQL\u53ef\u4ee5\u4f18\u5316\u8fd9\u79cd\u64cd\u4f5c\uff0c\u4f8b\u5982\uff1a<\/p>\n

java \u4ee3\u7801<\/p>\n

 <\/p>\n

    \n
  1. select city_name<\/li>\n
  2. from city,state<\/li>\n
  3. where state_id=state.id and state.code=\u2018CA\u2019\u201d converted to \u201cselect city_name from city where state_id=12<\/li>\n<\/ol>\n<\/blockquote>\n

    2.1.2 \u6570\u636e\u7c7b\u578b<\/p>\n

    \u6700\u57fa\u672c\u7684\u4f18\u5316\u4e4b\u4e00\u5c31\u662f\u4f7f\u8868\u5728\u78c1\u76d8\u4e0a\u5360\u636e\u7684\u7a7a\u95f4\u5c3d\u53ef\u80fd\u5c0f\u3002\u8fd9\u80fd\u5e26\u6765\u6027\u80fd\u975e\u5e38\u5927\u7684\u63d0\u5347\uff0c\u56e0\u4e3a\u6570\u636e\u5c0f\uff0c\u78c1\u76d8\u8bfb\u5165\u8f83\u5feb\uff0c\u5e76\u4e14\u5728\u67e5\u8be2\u8fc7\u7a0b\u4e2d\u8868\u5185\u5bb9\u88ab\u5904\u7406\u6240\u5360\u7528\u7684\u5185\u5b58\u66f4\u5c11\u3002\u540c\u65f6\uff0c\u5728\u66f4\u5c0f\u7684\u5217\u4e0a\u5efa\u7d22\u5f15\uff0c\u7d22\u5f15\u4e5f\u4f1a\u5360\u7528\u66f4\u5c11\u7684\u8d44\u6e90\u3002<\/p>\n

    \u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u6280\u672f\u53ef\u4ee5\u4f7f\u8868\u7684\u6027\u80fd\u66f4\u597d\u5e76\u4e14\u4f7f\u5b58\u50a8\u7a7a\u95f4\u6700\u5c0f\uff1a<\/p>\n

    1) \u4f7f\u7528\u6b63\u786e\u5408\u9002\u7684\u7c7b\u578b\uff0c\u4e0d\u8981\u5c06\u6570\u5b57\u5b58\u50a8\u4e3a\u5b57\u7b26\u4e32\u30022) \u5c3d\u53ef\u80fd\u5730\u4f7f\u7528\u6700\u6709\u6548(\u6700\u5c0f)\u7684\u6570\u636e\u7c7b\u578b\u3002MySQL\u6709\u5f88\u591a\u8282\u7701\u78c1\u76d8\u7a7a\u95f4\u548c\u5185\u5b58\u7684\u4e13\u4e1a\u5316\u7c7b\u578b\u3002<\/p>\n

    3) \u5c3d\u53ef\u80fd\u4f7f\u7528\u8f83\u5c0f\u7684\u6574\u6570\u7c7b\u578b\u4f7f\u8868\u66f4\u5c0f\u3002\u4f8b\u5982\uff0cMEDIUMINT\u7ecf\u5e38\u6bd4INT\u597d\u4e00\u4e9b\uff0c\u56e0\u4e3aMEDIUMINT\u5217\u4f7f\u7528\u7684\u7a7a\u95f4\u8981\u5c1125%\u3002<\/p>\n

    4) \u5047\u5982\u53ef\u80fd\uff0c\u58f0\u660e\u5217\u4e3aNOT NULL\u3002\u5b83\u4f7f\u4efb\u4f55\u4e8b\u60c5\u66f4\u5feb\u800c\u4e14\u6bcf\u5217\u53ef\u4ee5\u8282\u7701\u4e00\u4f4d\u3002\u6ce8\u91cd\u5047\u5982\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786e\u5b9e\u9700\u8981NULL\uff0c\u5e94\u8be5\u6beb\u65e0\u7591\u95ee\u4f7f\u7528\u5b83\uff0c\u53ea\u662f\u907f\u514d \u9ed8\u8ba4\u5730\u5728\u6240\u6709\u5217\u4e0a\u6709\u5b83\u3002<\/p>\n

    5) \u5bf9\u4e8eMyISAM\u8868\uff0c\u5047\u5982\u6ca1\u6709\u4efb\u4f55\u53d8\u957f\u5217(VARCHAR\u3001TEXT\u6216BLOB\u5217)\uff0c\u4f7f\u7528\u56fa\u5b9a\u5c3a\u5bf8\u7684\u8bb0\u5f55\u683c\u5f0f\u3002\u8fd9\u6bd4\u8f83\u5feb\u4f46\u662f\u4e0d\u5e78\u5730\u53ef\u80fd\u4f1a\u6d6a\u8d39\u4e00\u4e9b\u7a7a\u95f4\u3002\u5373 \u4f7f\u4f60\u5df2\u7ecf\u7528CREATE\u9009\u9879\u8ba9VARCHAR\u5217ROW_FORMAT=fixed\uff0c\u4e5f\u53ef\u4ee5\u63d0\u793a\u60f3\u4f7f\u7528\u56fa\u5b9a\u957f\u5ea6\u7684\u884c\u3002<\/p>\n

    6) \u4f7f\u7528sample character set\uff0c\u4f8b\u5982latin1\u3002\u5c3d\u91cf\u5c11\u4f7f\u7528utf-8\uff0c\u56e0\u4e3autf-8\u5360\u7528\u7684\u7a7a\u95f4\u662flatin1\u76843\u500d\u3002\u53ef\u4ee5\u5728\u4e0d\u9700\u8981\u4f7f\u7528utf-8\u7684\u5b57\u6bb5\u4e0a\u9762\u4f7f\u7528latin1\uff0c\u4f8b\u5982mail\uff0curl\u7b49\u3002<\/p><\/blockquote>\n

    2.1.3 \u7d22\u5f15<\/p>\n

    \u6240\u6709MySQL\u5217\u7c7b\u578b\u53ef\u4ee5\u88ab\u7d22\u5f15\u3002\u5bf9\u76f8\u5173\u5217\u4f7f\u7528\u7d22\u5f15\u662f\u63d0\u9ad8SELECT\u64cd\u4f5c\u6027\u80fd\u7684\u6700\u4f73\u9014\u5f84\u3002\u4f7f\u7528\u7d22\u5f15\u5e94\u8be5\u6ce8\u91cd\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n

    1) MySQL\u53ea\u4f1a\u4f7f\u7528\u524d\u7f00\uff0c\u4f8b\u5982key(a, b) \u2026where b=5 \u5c06\u4f7f\u7528\u4e0d\u5230\u7d22\u5f15\u30022) \u8981\u9009\u62e9\u6027\u7684\u4f7f\u7528\u7d22\u5f15\u3002\u5728\u53d8\u5316\u5f88\u5c11\u7684\u5217\u4e0a\u4f7f\u7528\u7d22\u5f15\u5e76\u4e0d\u662f\u5f88\u597d\uff0c\u4f8b\u5982\u6027\u522b\u5217\u3002<\/p>\n

    3) \u5728Unique\u5217\u4e0a\u5b9a\u4e49Unique index\u3002<\/p>\n

    4) \u907f\u514d\u5efa\u7acb\u4f7f\u7528\u4e0d\u5230\u7684\u7d22\u5f15\u3002<\/p>\n

    5) \u5728Btree index\u4e2d\uff08InnoDB\u4f7f\u7528Btree\uff09\uff0c\u53ef\u4ee5\u5728\u9700\u8981\u6392\u5e8f\u7684\u5217\u4e0a\u5efa\u7acb\u7d22\u5f15\u3002<\/p>\n

    6) \u907f\u514d\u53cd\u590d\u7684\u7d22\u5f15\u3002<\/p>\n

    7) \u907f\u514d\u5728\u5df2\u6709\u7d22\u5f15\u7684\u524d\u7f00\u4e0a\u5efa\u7acb\u7d22\u5f15\u3002\u4f8b\u5982\uff1a\u5047\u5982\u5b58\u5728index\uff08a\uff0cb\uff09\u5219\u53bb\u6389index\uff08a\uff09\u3002<\/p>\n

    8) \u63a7\u5236\u5355\u4e2a\u7d22\u5f15\u7684\u957f\u5ea6\u3002\u4f7f\u7528key\uff08name\uff088\uff09\uff09\u5728\u6570\u636e\u7684\u524d\u9762\u51e0\u4e2a\u5b57\u7b26\u5efa\u7acb\u7d22\u5f15\u3002<\/p>\n

    9) \u8d8a\u662f\u77ed\u7684\u952e\u503c\u8d8a\u597d\uff0c\u6700\u597d\u4f7f\u7528integer\u3002<\/p>\n

    10) \u5728\u67e5\u8be2\u4e2d\u8981\u4f7f\u7528\u5230\u7d22\u5f15\uff08\u4f7f\u7528explain\u67e5\u770b\uff09\uff0c\u53ef\u4ee5\u51cf\u5c11\u8bfb\u78c1\u76d8\u7684\u6b21\u6570\uff0c\u52a0\u901f\u8bfb\u53d6\u6570\u636e\u3002<\/p>\n

    11) \u76f8\u8fd1\u7684\u952e\u503c\u6bd4\u968f\u673a\u597d\u3002Auto_increment\u5c31\u6bd4uuid\u597d\u3002<\/p>\n

    12) Optimize table\u53ef\u4ee5\u538b\u7f29\u548c\u6392\u5e8findex\uff0c\u6ce8\u91cd\u4e0d\u8981\u9891\u7e41\u8fd0\u884c\u3002<\/p>\n

    13) Analyze table\u53ef\u4ee5\u66f4\u65b0\u6570\u636e\u3002<\/p><\/blockquote>\n

    2.2 Designing queries<\/p>\n

    \u67e5\u8be2\u8bed\u53e5\u7684\u4f18\u5316\u662f\u4e00\u4e2aCase by case\u7684\u95ee\u9898\uff0c\u4e0d\u540c\u7684sql\u6709\u4e0d\u540c\u7684\u4f18\u5316\u65b9\u6848\uff0c\u5728\u8fd9\u91cc\u6211\u53ea\u5217\u51fa\u4e00\u4e9b\u901a\u7528\u7684\u6280\u5de7\u3002<\/p>\n

    1) \u5728\u6709index\u7684\u60c5\u51b5\u4e0b\uff0c\u5c3d\u91cf\u4fdd\u8bc1\u67e5\u8be2\u4f7f\u7528\u4e86\u6b63\u786e\u7684index\u3002\u53ef\u4ee5\u4f7f\u7528EXPLAIN select \u2026\u67e5\u770b\u7ed3\u679c\uff0c\u5206\u6790\u67e5\u8be2\u30022) \u67e5\u8be2\u65f6\u4f7f\u7528\u5339\u914d\u7684\u7c7b\u578b\u3002\u4f8b\u5982select * from a where id=5\uff0c \u5047\u5982\u8fd9\u91ccid\u662f\u5b57\u7b26\u7c7b\u578b\uff0c\u540c\u65f6\u6709index\uff0c\u8fd9\u6761\u67e5\u8be2\u5219\u4f7f\u7528\u4e0d\u5230index\uff0c\u4f1a\u505a\u5168\u8868\u626b\u63cf\uff0c\u901f\u5ea6\u4f1a\u5f88\u6162\u3002\u6b63\u786e\u7684\u5e94\u8be5\u662f \u2026 where id=\u201d5\u201d \uff0c\u52a0\u4e0a\u5f15\u53f7\u8868\u660e\u7c7b\u578b\u662f\u5b57\u7b26\u3002<\/p>\n

    3) \u4f7f\u7528–log-slow-queries \u2013long-query-time=2\u67e5\u770b\u67e5\u8be2\u6bd4\u8f83\u6162\u7684\u8bed\u53e5\u3002\u7136\u540e\u4f7f\u7528explain\u5206\u6790\u67e5\u8be2\uff0c\u505a\u51fa\u4f18\u5316\u3002<\/p><\/blockquote>\n

    3. \u670d\u52a1\u5668\u7aef\u4f18\u5316<\/p>\n

    3.1 MySQL\u5b89\u88c5<\/p>\n

    MySQL\u6709\u5f88\u591a\u53d1\u884c\u7248\u672c\uff0c\u6700\u597d\u4f7f\u7528MySQL AB\u53d1\u5e03\u7684\u4e8c\u8fdb\u5236\u7248\u672c\u3002\u4e5f\u53ef\u4ee5\u4e0b\u8f7d\u6e90\u4ee3\u7801\u8fdb\u884c\u7f16\u8bd1\u5b89\u88c5\uff0c\u4f46\u662f\u7f16\u8bd1\u5668\u548c\u7c7b\u5e93\u7684\u4e00\u4e9bbug\u53ef\u80fd\u4f1a\u4f7f\u7f16\u8bd1\u5b8c\u6210\u7684MySQL\u5b58\u5728\u6f5c\u5728\u7684\u95ee\u9898\u3002<\/p>\n

    \u5047\u5982\u5b89\u88c5MySQL\u7684\u670d\u52a1\u5668\u4f7f\u7528\u7684\u662fIntel\u516c\u53f8\u7684\u5904\u7406\u5668\uff0c\u53ef\u4ee5\u4f7f\u7528intel c++\u7f16\u8bd1\u7684\u7248\u672c\uff0c\u5728Linux World2005\u7684\u4e00\u7bc7PPT\u4e2d\u63d0\u5230\uff0c\u4f7f\u7528intel C++\u7f16\u8bd1\u5668\u7f16\u8bd1\u7684MySQL\u67e5\u8be2\u901f\u5ea6\u6bd4\u6b63\u5e38\u7248\u672c\u5feb30%\u5de6\u53f3\u3002Intel c++\u7f16\u8bd1\u7248\u672c\u53ef\u4ee5\u5728MySQL\u5b98\u65b9\u7f51\u7ad9\u4e0b\u8f7d\u3002<\/p>\n

    3.2 \u670d\u52a1\u5668\u8bbe\u7f6e\u4f18\u5316<\/p>\n

    MySQL\u9ed8\u8ba4\u7684\u8bbe\u7f6e\u6027\u80fd\u5f88\u5dee\uff0c\u6240\u4ee5\u8981\u505a\u4e00\u4e9b\u53c2\u6570\u7684\u8c03\u6574\u3002\u8fd9\u4e00\u8282\u4ecb\u7ecd\u4e00\u4e9b\u901a\u7528\u7684\u53c2\u6570\u8c03\u6574\uff0c\u4e0d\u6d89\u53ca\u5177\u4f53\u7684\u5b58\u50a8\u5f15\u64ce\uff08\u4e3b\u8981\u6307MyISAM\uff0cInnoDB\uff0c\u76f8\u5173\u4f18\u5316\u57284\u4e2d\u4ecb\u7ecd\uff09\u3002<\/p>\n

    –character-set\uff1a\u5047\u5982\u662f\u5355\u4e00\u8bed\u8a00\u4f7f\u7528\u7b80\u5355\u7684character set\u4f8b\u5982latin1\u3002\u5c3d\u91cf\u5c11\u7528Utf-8\uff0cutf-8\u5360\u7528\u7a7a\u95f4\u8f83\u591a\u3002–memlock\uff1a\u9501\u5b9aMySQL\u53ea\u80fd\u8fd0\u884c\u5728\u5185\u5b58\u4e2d\uff0c\u907f\u514dswapping\uff0c\u4f46\u662f\u5047\u5982\u5185\u5b58\u4e0d\u591f\u65f6\u6709\u53ef\u80fd\u51fa\u73b0\u9519\u8bef\u3002<\/p>\n

    –max_allowed_packet\uff1a\u8981\u8db3\u591f\u5927\uff0c\u4ee5\u9002\u5e94\u6bd4\u8f83\u5927\u7684SQL\u67e5\u8be2\uff0c\u5bf9\u6027\u80fd\u6ca1\u6709\u592a\u5927\u5f71\u54cd\uff0c\u4e3b\u8981\u662f\u907f\u514d\u51fa\u73b0packet\u9519\u8bef\u3002<\/p>\n

    –max_connections\uff1aserver\u7b54\u5e94\u7684\u6700\u5927\u8fde\u63a5\u3002\u592a\u5927\u7684\u8bdd\u4f1a\u51fa\u73b0out of memory\u3002<\/p>\n

    –table_cache\uff1aMySQL\u5728\u540c\u4e00\u65f6\u95f4\u4fdd\u6301\u6253\u5f00\u7684table\u7684\u6570\u91cf\u3002\u6253\u5f00table\u5f00\u9500\u6bd4\u8f83\u5927\u3002\u4e00\u822c\u8bbe\u7f6e\u4e3a512\u3002<\/p>\n

    –query_cache_size\uff1a \u7528\u4e8e\u7f13\u5b58\u67e5\u8be2\u7684\u5185\u5b58\u5927\u5c0f\u3002<\/p>\n

    –datadir\uff1amysql\u5b58\u653e\u6570\u636e\u7684\u6839\u76ee\u5f55\uff0c\u548c\u5b89\u88c5\u6587\u4ef6\u5206\u5f00\u5728\u4e0d\u540c\u7684\u78c1\u76d8\u53ef\u4ee5\u63d0\u9ad8\u4e00\u70b9\u6027\u80fd\u3002<\/p><\/blockquote>\n

    4. \u5b58\u50a8\u5f15\u64ce\u4f18\u5316<\/p>\n

    MySQL\u652f\u6301\u4e0d\u540c\u7684\u5b58\u50a8\u5f15\u64ce\uff0c\u4e3b\u8981\u4f7f\u7528\u7684\u6709MyISAM\u548cInnoDB\u3002<\/p>\n

    4.1 MyISAM<\/p>\n

    MyISAM\u7ba1\u7406\u975e\u4e8b\u52a1\u8868\u3002\u5b83\u63d0\u4f9b\u9ad8\u901f\u5b58\u50a8\u548c\u68c0\u7d22\uff0c\u4ee5\u53ca\u5168\u6587\u641c\u7d22\u80fd\u529b\u3002MyISAM\u5728\u6240\u6709MySQL\u914d\u7f6e\u91cc\u88ab\u652f\u6301\uff0c\u5b83\u662f\u9ed8\u8ba4\u7684\u5b58\u50a8\u5f15\u64ce\uff0c\u9664\u975e\u914d\u7f6eMySQL\u9ed8\u8ba4\u4f7f\u7528\u53e6\u5916\u4e00\u4e2a\u5f15\u64ce\u3002<\/p>\n

    4.1.1 MyISAM\u7279\u6027<\/p>\n

    4.1.1.1 MyISAM Properties<\/p>\n

    1) \u4e0d\u652f\u6301\u4e8b\u52a1\uff0c\u5b95\u673a\u4f1a\u7834\u574f\u88682) \u4f7f\u7528\u8f83\u5c0f\u7684\u5185\u5b58\u548c\u78c1\u76d8\u7a7a\u95f4<\/p>\n

    3) \u57fa\u4e8e\u8868\u7684\u9501\uff0c\u5e76\u53d1\u66f4\u65b0\u6570\u636e\u4f1a\u51fa\u73b0\u4e25\u91cd\u6027\u80fd\u95ee\u9898<\/p>\n

    4) MySQL\u53ea\u7f13\u5b58Index\uff0c\u6570\u636e\u7531OS\u7f13\u5b58<\/p><\/blockquote>\n

    4.1.1.2 Typical MyISAM usages<\/p>\n

    1) \u65e5\u5fd7\u7cfb\u7edf2) \u53ea\u8bfb\u6216\u8005\u7edd\u5927\u90e8\u5206\u662f\u8bfb\u64cd\u4f5c\u7684\u5e94\u7528<\/p>\n

    3) \u5168\u8868\u626b\u63cf<\/p>\n

    4) \u6279\u91cf\u5bfc\u5165\u6570\u636e<\/p>\n

    5) \u6ca1\u6709\u4e8b\u52a1\u7684\u4f4e\u5e76\u53d1\u8bfb\/\u5199<\/p><\/blockquote>\n

    4.1.2 MyISAM\u4f18\u5316\u8981\u70b9<\/p>\n

    1) \u58f0\u660e\u5217\u4e3aNOT NULL\uff0c\u53ef\u4ee5\u51cf\u5c11\u78c1\u76d8\u5b58\u50a8\u30022) \u4f7f\u7528optimize table\u505a\u788e\u7247\u6574\u7406\uff0c\u56de\u6536\u7a7a\u95f2\u7a7a\u95f4\u3002\u6ce8\u91cd\u4ec5\u4ec5\u5728\u975e\u5e38\u5927\u7684\u6570\u636e\u53d8\u5316\u540e\u8fd0\u884c\u3002<\/p>\n

    3) Deleting\/updating\/adding\u5927\u91cf\u6570\u636e\u7684\u65f6\u5019\u7981\u6b62\u4f7f\u7528index\u3002\u4f7f\u7528ALTER TABLE t DISABLE KEYS\u3002<\/p>\n

    4) \u8bbe\u7f6emyisam_max_[extra]_sort_file_size\u8db3\u591f\u5927\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8repair table\u7684\u901f\u5ea6\u3002<\/p><\/blockquote>\n

    4.1.3 MyISAM Table Locks<\/p>\n

    1) \u907f\u514d\u5e76\u53d1insert\uff0cupdate\u30022) \u53ef\u4ee5\u4f7f\u7528insert delayed\uff0c\u4f46\u662f\u6709\u53ef\u80fd\u4e22\u5931\u6570\u636e\u3002<\/p>\n

    3) \u4f18\u5316\u67e5\u8be2\u8bed\u53e5\u3002<\/p>\n

    4) \u6c34\u5e73\u5206\u533a\u3002<\/p>\n

    5) \u5782\u76f4\u5206\u533a\u3002<\/p>\n

    6) \u5047\u5982\u90fd\u4e0d\u8d77\u4f5c\u7528\uff0c\u4f7f\u7528InnoDB\u3002<\/p><\/blockquote>\n

    4.1.4 MyISAM Key Cache<\/p>\n

    1) \u8bbe\u7f6ekey_buffer_size variable\u3002MyISAN\u6700\u4e3b\u8981\u7684cache\u8bbe\u7f6e\uff0c\u7528\u4e8e\u7f13\u5b58MyISAM\u8868\u683c\u7684index\u6570\u636e\uff0c\u8be5\u53c2\u6570\u53ea\u5bf9MyISAM\u6709\u5f71\u54cd\u3002\u901a\u5e38\u5728\u53ea\u4f7f\u7528MyISAM\u7684Server\u4e2d\u8bbe\u7f6e25-33%\u7684\u5185\u5b58\u5927\u5c0f\u30022) \u53ef\u4ee5\u4f7f\u7528\u51e0\u4e2a\u4e0d\u540c\u7684Key Caches\uff08\u5bf9\u4e00\u4e9bhot data\uff09\u3002<\/p>\n

     <\/p>\n

    a) SET GLOBAL test.key_buffer_size=512*1024;b) CACHE INDEX t1.i1, t2.i1, t3 IN test;<\/p><\/blockquote>\n

    2) Preload index\u5230Cache\u4e2d\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u901f\u5ea6\u3002\u56e0\u4e3apreloading index\u662f\u987a\u5e8f\u7684\uff0c\u6240\u4ee5\u975e\u5e38\u5feb\u3002<\/p>\n

    a) LOAD INDEX INTO CACHE t1, t2 IGNORE LEAVES\uff1b<\/p><\/blockquote>\n<\/blockquote>\n

    4.2 InnoDB<\/p>\n

    InnoDB\u7ed9MySQL\u63d0\u4f9b\u4e86\u5177\u6709\u63d0\u4ea4\uff0c\u56de\u6eda\u548c\u5d29\u6e83\u6062\u590d\u80fd\u529b\u7684\u4e8b\u52a1\u5b89\u5168\uff08ACID\u517c\u5bb9\uff09\u5b58 \u50a8\u5f15\u64ce\u3002InnoDB\u63d0\u4f9brow level lock\uff0c\u5e76\u4e14\u4e5f\u5728SELECT\u8bed\u53e5\u63d0\u4f9b\u4e00\u4e2aOracle\u98ce\u683c\u4e00\u81f4\u7684\u975e\u9501\u5b9a\u8bfb\u3002\u8fd9\u4e9b\u7279\u8272\u589e\u52a0\u4e86\u591a\u7528\u6237\u90e8\u7f72\u548c\u6027\u80fd\u3002\u6ca1\u6709\u5728InnoDB\u4e2d\u6269\u5927\u9501\u5b9a\u7684\u9700\u8981\uff0c\u56e0 \u4e3a\u5728InnoDB\u4e2drow level lock\u9002\u5408\u975e\u5e38\u5c0f\u7684\u7a7a\u95f4\u3002InnoDB\u4e5f\u652f\u6301FOREIGN KEY\u7ea6\u675f\u3002\u5728SQL\u67e5\u8be2\u4e2d\uff0c\u4f60\u53ef\u4ee5\u81ea\u7531\u5730\u5c06InnoDB\u7c7b\u578b\u7684\u8868\u4e0e\u5176\u5b83MySQL\u7684\u8868\u7684\u7c7b\u578b\u6df7\u5408\u8d77\u6765\uff0c\u751a\u81f3\u5728\u540c\u4e00\u4e2a\u67e5\u8be2\u4e2d\u4e5f\u53ef\u4ee5\u6df7\u5408\u3002<\/p>\n

    InnoDB\u662f\u4e3a\u5728\u5904\u7406\u5de8\u5927\u6570\u636e\u91cf\u65f6\u83b7\u5f97\u6700\u5927\u6027\u80fd\u800c\u8bbe\u8ba1\u7684\u3002\u5b83\u7684CPU\u4f7f\u7528\u6548\u7387\u975e\u5e38\u9ad8\u3002<\/p>\n

    InnoDB\u5b58\u50a8\u5f15\u64ce\u5df2\u7ecf\u5b8c\u5168\u4e0eMySQL\u670d\u52a1\u5668\u6574\u5408\uff0cInnoDB\u5b58\u50a8\u5f15\u64ce\u4e3a\u5728\u5185\u5b58\u4e2d\u7f13\u5b58 \u6570\u636e\u548c\u7d22\u5f15\u800c\u7ef4\u6301\u5b83\u81ea\u5df1\u7684\u7f13\u51b2\u6c60\u3002 InnoDB\u5b58\u50a8\u5b83\u7684\u8868\uff06\u7d22\u5f15\u5728\u4e00\u4e2a\u8868\u7a7a\u95f4\u4e2d\uff0c\u8868\u7a7a\u95f4\u53ef\u4ee5\u5305\u542b\u6570\u4e2a\u6587\u4ef6\uff08\u6216\u539f\u59cb\u78c1\u76d8\u5206\u533a\uff09\u3002\u8fd9\u4e0eMyISAM\u8868\u4e0d\u540c\uff0c\u6bd4\u5982\u5728MyISAM\u8868\u4e2d\u6bcf\u4e2a\u8868\u88ab\u5b58\u5728 \u5206\u79bb\u7684\u6587\u4ef6\u4e2d\u3002InnoDB \u8868\u53ef\u4ee5\u662f\u4efb\u4f55\u5927\u5c0f\uff0c\u5373\u4f7f\u5728\u6587\u4ef6\u5c3a\u5bf8\u88ab\u9650\u5236\u4e3a2GB\u7684\u64cd\u4f5c\u7cfb\u7edf\u4e0a\u3002<\/p>\n

    \u8bb8\u591a\u9700\u8981\u9ad8\u6027\u80fd\u7684\u5927\u578b\u6570\u636e\u5e93\u7ad9\u70b9\u4e0a\u4f7f\u7528\u4e86InnoDB\u5f15\u64ce\u3002\u95fb\u540d\u7684Internet\u65b0\u95fb\u7ad9\u70b9 Slashdot.org\u8fd0\u884c\u5728InnoDB\u4e0a\u3002 Mytrix, Inc.\u5728InnoDB\u4e0a\u5b58\u50a8\u8d85\u8fc71TB\u7684\u6570\u636e\uff0c\u8fd8\u6709\u4e00\u4e9b\u5176\u5b83\u7ad9\u70b9\u5728InnoDB\u4e0a\u5904\u7406\u5e73\u5747\u6bcf\u79d2800\u6b21\u63d2\u5165\/\u66f4\u65b0\u7684\u8d1f\u8377\u3002<\/p>\n

    4.2.1 InnoDB\u7279\u6027<\/p>\n

    4.2.1.1 InnoDB Properties<\/p>\n

    1) \u652f\u6301\u4e8b\u52a1\uff0cACID\uff0c\u5916\u952e\u30022) Row level locks\u3002<\/p>\n

    3) \u652f\u6301\u4e0d\u540c\u7684\u9694\u79bb\u7ea7\u522b\u3002<\/p>\n

    4) \u548cMyISAM\u76f8\u6bd4\u9700\u8981\u8f83\u591a\u7684\u5185\u5b58\u548c\u78c1\u76d8\u7a7a\u95f4\u3002<\/p>\n

    5) \u6ca1\u6709\u952e\u538b\u7f29\u3002<\/p>\n

    6) \u6570\u636e\u548c\u7d22\u5f15\u90fd\u7f13\u5b58\u5728\u5185\u5b58hash\u8868\u4e2d\u3002<\/p><\/blockquote>\n

    4.2.1.2 InnoDB Good For<\/p>\n

    1) \u9700\u8981\u4e8b\u52a1\u7684\u5e94\u7528\u30022) \u9ad8\u5e76\u53d1\u7684\u5e94\u7528\u3002<\/p>\n

    3) \u81ea\u52a8\u6062\u590d\u3002<\/p>\n

    4) \u8f83\u5feb\u901f\u7684\u57fa\u4e8e\u4e3b\u952e\u7684\u64cd\u4f5c\u3002<\/p><\/blockquote>\n

    4.2.2 InnoDB\u4f18\u5316\u8981\u70b9<\/p>\n

    1) \u5c3d\u91cf\u4f7f\u7528short\uff0cinteger\u7684\u4e3b\u952e\u30022) Load\/Insert\u6570\u636e\u65f6\u6309\u4e3b\u952e\u987a\u5e8f\u3002\u5047\u5982\u6570\u636e\u6ca1\u6709\u6309\u4e3b\u952e\u6392\u5e8f\uff0c\u5148\u6392\u5e8f\u7136\u540e\u518d\u8fdb\u884c\u6570\u636e\u5e93\u64cd\u4f5c\u3002<\/p>\n

    3) \u5728Load\u6570\u636e\u662f\u4e3a\u8bbe\u7f6eSET UNIQUE_CHECKS=0\uff0cSET FOREIGN_KEY_CHECKS=0\uff0c\u53ef\u4ee5\u907f\u514d\u5916\u952e\u548c\u552f\u4e00\u6027\u7ea6\u675f\u68c0\u67e5\u7684\u5f00\u9500\u3002<\/p>\n

    4) \u4f7f\u7528prefix keys\u3002\u56e0\u4e3aInnoDB\u6ca1\u6709key\u538b\u7f29\u529f\u80fd\u3002<\/p><\/blockquote>\n

    4.2.3 InnoDB\u670d\u52a1\u5668\u7aef\u8bbe\u5b9a<\/p>\n

    innodb_buffer_pool_size\uff1a\u8fd9\u662fInnoDB\u6700\u91cd\u8981\u7684\u8bbe\u7f6e\uff0c\u5bf9InnoDB\u6027\u80fd\u6709\u51b3\u5b9a\u6027\u7684\u5f71\u54cd\u3002 \u9ed8\u8ba4\u7684\u8bbe\u7f6e\u53ea\u67098M\uff0c\u6240\u4ee5\u9ed8\u8ba4\u7684\u6570\u636e\u5e93\u8bbe\u7f6e\u4e0b\u9762InnoDB\u6027\u80fd\u5f88\u5dee\u3002\u5728\u53ea\u6709InnoDB\u5b58\u50a8\u5f15\u64ce\u7684\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u9762\uff0c\u53ef\u4ee5\u8bbe\u7f6e60-80%\u7684\u5185\u5b58\u3002\u66f4\u7cbe \u786e\u4e00\u70b9\uff0c\u5728\u5185\u5b58\u5bb9\u91cf\u7b54\u5e94\u7684\u60c5\u51b5\u4e0b\u9762\u8bbe\u7f6e\u6bd4InnoDB tablespaces\u592710%\u7684\u5185\u5b58\u5927\u5c0f\u3002innodb_data_file_path\uff1a\u6307\u5b9a\u8868\u6570\u636e\u548c\u7d22\u5f15\u5b58\u50a8\u7684\u7a7a\u95f4\uff0c\u53ef\u4ee5\u662f\u4e00\u4e2a\u6216\u8005 \u591a\u4e2a\u6587\u4ef6\u3002\u6700\u540e\u4e00\u4e2a\u6570\u636e\u6587\u4ef6\u5fc5\u987b\u662f\u81ea\u52a8\u6269\u5145\u7684\uff0c\u4e5f\u53ea\u6709\u6700\u540e\u4e00\u4e2a\u6587\u4ef6\u7b54\u5e94\u81ea\u52a8\u6269\u5145\u3002\u8fd9\u6837\uff0c\u5f53\u7a7a\u95f4\u7528\u5b8c\u540e\uff0c\u81ea\u52a8\u6269\u5145\u6570\u636e\u6587\u4ef6\u5c31\u4f1a\u81ea\u52a8\u589e\u957f\uff08\u4ee58MB\u4e3a\u5355\u4f4d\uff09\u4ee5 \u5bb9\u7eb3\u989d\u5916\u7684\u6570\u636e\u3002\u4f8b\u5982\uff1a innodb_data_file_path=\/disk1 \/ibdata1:900M;\/disk2\/ibdata2:50M:autoextend\u4e24\u4e2a\u6570\u636e\u6587\u4ef6\u653e\u5728\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\u3002\u6570\u636e\u9996\u5148\u653e\u5728ibdata1 \u4e2d\uff0c\u5f53\u8fbe\u5230900M\u4ee5\u540e\uff0c\u6570\u636e\u5c31\u653e\u5728ibdata2\u4e2d\u3002\u4e00\u65e6\u8fbe\u523050MB\uff0cibdata2\u5c06\u4ee58MB\u4e3a\u5355\u4f4d\u81ea\u52a8\u589e\u957f\u3002\u5047\u5982\u78c1\u76d8\u6ee1\u4e86\uff0c\u9700\u8981\u5728\u53e6\u5916\u7684\u78c1\u76d8\u4e0a\u9762 \u589e\u52a0\u4e00\u4e2a\u6570\u636e\u6587\u4ef6\u3002<\/p><\/blockquote>\n

    innodb_autoextend_increment: \u9ed8\u8ba4\u662f8M, \u5047\u5982\u4e00\u6b21insert\u6570\u636e\u91cf\u6bd4\u8f83\u591a\u7684\u8bdd, \u53ef\u4ee5\u9002\u5f53\u589e\u52a0.innodb_data_home_dir\uff1a\u653e\u7f6e\u8868\u7a7a\u95f4\u6570\u636e\u7684\u76ee\u5f55\uff0c\u9ed8\u8ba4\u5728mysql\u7684\u6570\u636e\u76ee\u5f55\uff0c\u8bbe\u7f6e\u5230\u548cMySQL\u5b89\u88c5\u6587\u4ef6\u4e0d\u540c\u7684\u5206\u533a\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n

    innodb_log_file_size\uff1a\u8be5\u53c2\u6570\u51b3\u5b9a\u4e86recovery speed\u3002\u592a\u5927\u7684\u8bddrecovery\u5c31\u4f1a\u6bd4\u8f83\u6162\uff0c\u592a\u5c0f\u4e86\u5f71\u54cd\u67e5\u8be2\u6027\u80fd\uff0c\u4e00\u822c\u53d6256M\u53ef\u4ee5\u517c\u987e\u6027\u80fd\u548crecovery\u7684\u901f\u5ea6<\/p>\n

    \u3002<\/p>\n

    innodb_log_buffer_size\uff1a\u78c1\u76d8\u901f\u5ea6\u662f\u5f88\u6162\u7684\uff0c\u76f4\u63a5\u5c06log\u5199\u9053\u78c1\u76d8\u4f1a\u5f71\u54cdInnoDB\u7684\u6027\u80fd\uff0c\u8be5\u53c2\u6570\u8bbe\u5b9a\u4e86log buffer\u7684\u5927\u5c0f\uff0c\u4e00\u822c4M\u3002\u5047\u5982\u6709\u5927\u7684blob\u64cd\u4f5c\uff0c\u53ef\u4ee5\u9002\u5f53\u589e\u5927\u3002<\/p>\n

    innodb_flush_logs_at_trx_commit=2\uff1a \u8be5\u53c2\u6570\u8bbe\u5b9a\u4e86\u4e8b\u52a1\u63d0\u4ea4\u65f6\u5185\u5b58\u4e2dlog\u4fe1\u606f\u7684\u5904\u7406\u3002<\/p>\n

     <\/p>\n

    1) =1\u65f6\uff0c\u5728\u6bcf\u4e2a\u4e8b\u52a1\u63d0\u4ea4\u65f6\uff0c\u65e5\u5fd7\u7f13\u51b2\u88ab\u5199\u5230\u65e5\u5fd7\u6587\u4ef6\uff0c\u5bf9\u65e5\u5fd7\u6587\u4ef6\u505a\u5230\u78c1\u76d8\u64cd\u4f5c\u7684\u5237\u65b0\u3002Truly ACID\u3002\u901f\u5ea6\u6162\u30022) =2\u65f6\uff0c\u5728\u6bcf\u4e2a\u4e8b\u52a1\u63d0\u4ea4\u65f6\uff0c\u65e5\u5fd7\u7f13\u51b2\u88ab\u5199\u5230\u6587\u4ef6\uff0c\u4f46\u4e0d\u5bf9\u65e5\u5fd7\u6587\u4ef6\u505a\u5230\u78c1\u76d8\u64cd\u4f5c\u7684\u5237\u65b0\u3002\u53ea\u6709\u64cd\u4f5c\u7cfb\u7edf\u5d29\u6e83\u6216\u6389\u7535\u624d\u4f1a\u5220\u9664\u6700\u540e\u4e00\u79d2\u7684\u4e8b\u52a1\uff0c\u4e0d\u7136\u4e0d\u4f1a\u4e22\u5931\u4e8b\u52a1\u3002<\/p>\n

    3) =0\u65f6\uff0c \u65e5\u5fd7\u7f13\u51b2\u6bcf\u79d2\u4e00\u6b21\u5730\u88ab\u5199\u5230\u65e5\u5fd7\u6587\u4ef6\uff0c\u5e76\u4e14\u5bf9\u65e5\u5fd7\u6587\u4ef6\u505a\u5230\u78c1\u76d8\u64cd\u4f5c\u7684\u5237\u65b0\u3002\u4efb\u4f55mysqld\u8fdb\u7a0b\u7684\u5d29\u6e83\u4f1a\u5220\u9664\u5d29\u6e83\u524d\u6700\u540e\u4e00\u79d2\u7684\u4e8b\u52a1<\/p><\/blockquote>\n

    innodb_file_per_table\uff1a\u53ef\u4ee5\u5b58\u50a8\u6bcf\u4e2aInnoDB\u8868\u548c\u5b83\u7684\u7d22\u5f15\u5728\u5b83\u81ea\u5df1\u7684\u6587\u4ef6\u4e2d\u3002transaction-isolation=READ-COMITTED: \u5047\u5982\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u8fd0\u884c\u5728READ-COMMITED\u9694\u79bb\u7ea7\u522b\uff0c\u505a\u6b64\u8bbe\u5b9a\u4f1a\u6709\u4e00\u5b9a\u7684\u6027\u80fd\u63d0\u5347\u3002<\/p>\n

    innodb_flush_method\uff1a \u8bbe\u7f6eInnoDB\u540c\u6b65IO\u7684\u65b9\u5f0f\uff1a<\/p>\n

     <\/p>\n

    1) Default \u2013 \u4f7f\u7528fsync\uff08\uff09\u30022) O_SYNC \u4ee5sync\u6a21\u5f0f\u6253\u5f00\u6587\u4ef6\uff0c\u901a\u5e38\u6bd4\u8f83\u6162\u3002<\/p>\n

    3) O_DIRECT\uff0c\u5728Linux\u4e0a\u4f7f\u7528Direct IO\u3002\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u901f\u5ea6\uff0c\u975e\u51e1\u662f\u5728RAID\u7cfb\u7edf\u4e0a\u3002\u907f\u514d\u989d\u5916\u7684\u6570\u636e\u590d\u5236\u548cdouble buffering\uff08mysql buffering \u548cOS buffering\uff09\u3002<\/p><\/blockquote>\n

    innodb_thread_concurrency\uff1a InnoDB kernel\u6700\u5927\u7684\u7ebf\u7a0b\u6570\u3002<\/p>\n

    1) \u6700\u5c11\u8bbe\u7f6e\u4e3a(num_disks+num_cpus)*2\u30022) \u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u62101000\u6765\u7981\u6b62\u8fd9\u4e2a\u9650\u5236<\/p><\/blockquote>\n<\/blockquote>\n

    5. \u7f13\u5b58<\/p>\n

    \u7f13\u5b58\u6709\u5f88\u591a\u79cd\uff0c\u4e3a\u5e94\u7528\u7a0b\u5e8f\u52a0\u4e0a\u9002\u5f53\u7684\u7f13\u5b58\u7b56\u7565\u4f1a\u663e\u8457\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u3002\u7531\u4e8e\u5e94\u7528\u7f13\u5b58\u662f\u4e00\u4e2a\u6bd4\u8f83\u5927\u7684\u8bdd\u9898\uff0c\u6240\u4ee5\u8fd9\u4e00\u90e8\u5206\u8fd8\u9700\u8981\u8fdb\u4e00\u6b65\u8c03\u7814\u3002<\/p>\n

     <\/p>\n

     <\/p>\n

    1\u3001\u5b9a\u671f\u5206\u6790\u8868\u548c\u68c0\u67e5\u8868<\/p>\n

    \u5206\u6790\u8868\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

    \u5f15\u7528<\/p>\n

    ANALYZE [LOCAL | NO_WRITE_TO_BINLOG] TABLE tb1_name[, tbl_name]…<\/p>\n

    \u4ee5\u4e0a\u8bed\u53e5\u7528\u4e8e\u5206\u6790\u548c\u5b58\u50a8\u8868\u7684\u8981\u5bb3\u5b57\u5206\u5e03\uff0c\u5206\u6790\u7684\u7ed3\u679c\u5c06\u53ef\u4ee5\u4f7f\u5f97\u7cfb\u7edf\u5f97\u5230\u7cbe\u786e\u7684\u7edf\u8ba1\u4fe1\u606f\uff0c\u4f7f\u5f97SQL\u80fd\u591f\u751f\u6210\u6b63\u786e\u7684\u6267\u884c\u8ba1\u5212\u3002\u5047\u5982\u7528\u6237\u611f\u89c9\u5b9e\u9645\u6267\u884c\u8ba1\u5212\u5e76\u4e0d \u662f\u9884\u671f\u7684\u6267\u884c\u8ba1\u5212\uff0c\u6267\u884c\u4e00\u6b21\u5206\u6790\u8868\u53ef\u80fd\u4f1a\u89e3\u51b3\u95ee\u9898\u3002\u5728\u5206\u6790\u671f\u95f4\uff0c\u4f7f\u7528\u4e00\u4e2a\u8bfb\u53d6\u9501\u5b9a\u5bf9\u8868\u8fdb\u884c\u9501\u5b9a\u3002\u8fd9\u5bf9\u4e8eMyISAM\uff0cDBD\u548cInnoDB\u8868\u6709\u4f5c\u7528\u3002<\/p>\n

    \u4f8b\u5982\u5206\u6790\u4e00\u4e2a\u6570\u636e\u8868<\/p>\n

    \u5f15\u7528<\/p>\n

    analyze table table_name<\/p>\n

    \u68c0\u67e5\u8868\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

    \u5f15\u7528<\/p>\n

    CHECK TABLE tb1_name[,tbl_name]…[option]…option = {QUICK | FAST | MEDIUM | EXTENDED | CHANGED}<\/p>\n

    \u68c0\u67e5\u8868\u7684\u4f5c\u7528\u662f\u68c0\u67e5\u4e00\u4e2a\u6216\u591a\u4e2a\u8868\u662f\u5426\u6709\u9519\u8bef\uff0cCHECK TABLE \u5bf9MyISAM\u00a0 \u548c InnoDB\u8868\u6709\u4f5c\u7528\uff0c\u5bf9\u4e8eMyISAM\u8868\uff0c\u8981\u5bb3\u5b57\u7edf\u8ba1\u6570\u636e\u88ab\u66f4\u65b0<\/p>\n

     <\/p>\n

    CHECK TABLE \u4e5f\u53ef\u4ee5\u68c0\u67e5\u89c6\u56fe\u662f\u5426\u6709\u9519\u8bef\uff0c\u6bd4\u5982\u5728\u89c6\u56fe\u5b9a\u4e49\u4e2d\u88ab\u5f15\u7528\u7684\u8868\u4e0d\u5b58\u5728\u3002<\/p>\n

    2. \u5b9a\u671f\u4f18\u5316\u8868<\/p>\n

    \u4f18\u5316\u8868\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

    \u5f15\u7528<\/p>\n

    OPTIMIZE [LOCAL | NO_WRITE_TO_BINLOG] TABLE tb1_name [,tbl_name]…<\/p>\n

    \u5047\u5982\u5220\u9664\u4e86\u8868\u7684\u4e00\u5927\u90e8\u5206\uff0c\u6216\u8005\u5047\u5982\u5df2\u7ecf\u5bf9\u542b\u6709\u53ef\u53d8\u957f\u5ea6\u884c\u7684\u8868(\u542b\u6709 VARCHAR\u3001BLOB\u6216TEXT\u5217\u7684\u8868)\u8fdb\u884c\u66f4\u591a\u66f4\u6539\uff0c\u5219\u5e94\u4f7f\u7528OPTIMIZE TABLE\u547d\u4ee4\u6765\u8fdb\u884c\u8868\u4f18\u5316\u3002\u8fd9\u4e2a\u547d\u4ee4\u53ef\u4ee5\u5c06\u8868\u4e2d\u7684\u7a7a\u95f4\u788e\u7247\u8fdb\u884c\u5408\u5e76\uff0c\u5e76\u4e14\u53ef\u4ee5\u6d88\u9664\u7531\u4e8e\u5220\u9664\u6216\u8005\u66f4\u65b0\u9020\u6210\u7684\u7a7a\u95f4\u6d6a\u8d39\uff0c\u4f46OPTIMIZE TABLE \u547d\u4ee4\u53ea\u5bf9MyISAM\u3001 BDB \u548cInnoDB\u8868\u8d77\u4f5c\u7528\u3002<\/p>\n

    \u4f8b\u5982\uff1a optimize table table_name<\/p>\n

    \u6ce8\u91cd\uff1a analyze\u3001check\u3001optimize\u6267\u884c\u671f\u95f4\u5c06\u5bf9\u8868\u8fdb\u884c\u9501\u5b9a\uff0c\u56e0\u6b64\u4e00\u5b9a\u6ce8\u91cd\u8981\u5728\u6570\u636e\u5e93\u4e0d\u7e41\u5fd9\u7684\u65f6\u5019\u6267\u884c\u76f8\u5173\u7684\u64cd\u4f5c\u3002<\/p>\n

    \u5e38\u7528\u7684SQL\u4f18\u5316<\/p>\n

    \u6211\u4eec\u5728\u5f00\u53d1\u7684\u65f6\u5019\u7ecf\u5e38\u7528\u5230\u7684SQL\u8bed\u53e5\uff0c\u65e0\u975e\u662fINSERT\u3001GROUPBY\u7b49\u7b49\u3002\u5bf9\u4e8e\u8fd9\u4e9bSQL\u8bed\u53e5\uff0c\u6211\u4eec\u600e\u4e48\u8fdb\u884c\u4f18\u5316\uff1f<\/p>\n

    1. \u5927\u6279\u91cf\u63d2\u5165\u6570\u636e<\/p>\n

    \u5f53\u7528load\u547d\u4ee4\u5bfc\u5165\u6570\u636e\u7684\u65f6\u5019\uff0c\u9002\u5f53\u7684\u8bbe\u7f6e\u53ef\u4ee5\u63d0\u9ad8\u5bfc\u5165\u7684\u901f\u5ea6\u3002<\/p>\n

    \u5bf9\u4e8eMyISAM\u5b58\u50a8\u5f15\u64ce\u7684\u8868\uff0c\u53ef\u4ee5\u901a\u8fc7\u5982\u4e0b\u65b9\u5f0f\u5feb\u901f\u7684\u5bfc\u5165\u5927\u91cf\u7684\u6570\u636e<\/p>\n

    \u5f15\u7528<\/p>\n

    ALTER TABLE tb1_name DISABLE KEYS;<\/p>\n

    loading the data<\/p>\n

    ALTER TABLE tb1_name ENABLE KEYS;<\/p>\n

    DISABLE KEYS \u548c ENABLE KEYS \u7528\u6765\u6253\u5f00\u6216\u8005\u5173\u95edMyISAM\u8868\u975e\u552f\u4e00\u7d22\u5f15\u7684\u66f4\u65b0\u3002\u5728\u5bfc\u5165\u5927\u91cf\u7684\u6570\u636e\u5230\u4e00\u4e2a\u975e\u7a7a\u7684MyISAM\u8868\u65f6\uff0c\u901a\u8fc7\u8bbe\u7f6e\u8fd9\u4e24\u4e2a\u547d\u4ee4\uff0c\u53ef\u4ee5\u63d0\u9ad8\u5bfc\u5165\u7684\u6548\u7387\u3002<\/p>\n

    \u5bf9\u4e8e\u5bfc\u5165\u5927\u91cf\u7684\u6570\u636e\u5230\u4e00\u4e2a\u7a7a\u7684MyISAM\u8868\u65f6\uff0c\u9ed8\u8ba4\u5c31\u662f\u5148\u5bfc\u5165\u6570\u636e\u7136\u540e\u624d\u521b\u5efa\u7d22\u5f15\u7684\uff0c\u7d22\u5f15\u4e0d\u7528\u8fdb\u884c\u8bbe\u7f6e\u3002<\/p>\n

    \u5f15\u7528<\/p>\n

    load data infile ‘\/home\/mysql\/text_txt’ into table text<\/p>\n

    \u5bf9\u4e8eInnoDB\u7c7b\u578b\u7684\u8868\uff0c\u8fd9\u79cd\u65b9\u5f0f\u4e0d\u80fd\u63d0\u9ad8\u5bfc\u5165\u6570\u636e\u7684\u6548\u7387\uff0c\u4f46\u4e5f\u6709\u51e0\u79cd\u9488\u5bf9InnoDB\u7c7b\u578b\u7684\u8868\u8fdb\u884c\u4f18\u5316\u7684\u65b9\u5f0f\u3002<\/p>\n

    1. \u56e0\u4e3aInnoDB\u7c7b\u578b\u7684\u8868\u5f0f\u6309\u7167\u4e3b\u952e\u7684\u987a\u5e8f\u4fdd\u5b58\u7684\uff0c\u6240\u4ee5\u5c06\u5bfc\u5165\u7684\u6570\u636e\u6309\u7167\u4e3b\u952e\u7684\u987a\u5e8f\u6392\u5e8f\uff0c\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u5bfc\u5165\u6570\u636e\u7684\u6548\u7387\u3002<\/p>\n

    2. \u5728\u5bfc\u5165\u6570\u636e\u524d\u6267\u884c SET UNIQUE_CHECKS=0\uff0c\u5173\u95ed\u552f\u4e00\u6027\u6821\u9a8c\uff0c\u5728\u5bfc\u5165\u7ed3\u675f\u540e\u6267\u884cSET UNIQUE_CHECKS=1\uff0c\u6062\u590d\u552f\u4e00\u6027\u6821\u9a8c\uff0c\u53ef\u4ee5\u63d0\u9ad8\u5bfc\u5165\u7684\u6548\u7387\u3002<\/p>\n

    3. \u5047\u5982\u5e94\u7528\u4f7f\u7528\u81ea\u52a8\u63d0\u4ea4\u7684\u65b9\u5f0f\uff0c\u5efa\u8bae\u5728\u5bfc\u5165\u524d\u6267\u884cSET AUTOCOMMIT=0\uff0c\u5173\u95ed\u81ea\u52a8\u63d0\u4ea4\uff0c\u5bfc\u5165\u7ed3\u675f\u540e\u6267\u884cSET AUTOCOMMIT=1\uff0c\u6253\u5f00\u81ea\u52a8\u63d0\u4ea4\uff0c\u4e5f\u53ef\u4ee5\u63d0\u9ad8\u5bfc\u5165\u6548\u7387\u3002<\/p>\n

    \u4f18\u5316INSERT\u8bed\u53e5<\/p>\n

    \u5f53\u8fdb\u884c\u6570\u636eINSERT\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u8003\u8651\u91c7\u7528\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\u8fdb\u884c\u4f18\u5316<\/p>\n

    1. \u5047\u5982\u540c\u65f6\u4ece\u4e00\u4e2a\u5ba2\u6237\u63d2\u5165\u5f88\u591a\u884c\uff0c\u5c3d\u91cf\u4f7f\u7528\u591a\u4e2a\u503c\u8868\u7684INSERT\u8bed\u53e5\uff0c\u8fd9\u79cd\u65b9\u5f0f\u5c06\u5927\u5927\u7f29\u77ed\u5ba2\u6237\u7aef\u4e0e\u6570\u636e\u5e93\u7684\u94fe\u63a5\u3001\u5173\u95ed\u7b49\u6d88\u8017\uff0c\u4f7f\u5f97\u6548\u7387\u6bd4\u5206\u5f00\u6267\u884c\u7684\u5355\u4e2aINSERT\u8bed\u53e5\u5feb.<\/p>\n

    \u4f8b\u5982\uff1a<\/p>\n

    insert into test values(1,2)<\/p>\n

    insert into test values(3,4)<\/p>\n

    insert into test values(5,6)<\/p>\n

    \u5c06\u4e0a\u9762\u4e09\u53e5\u6539\u4e3a:insert into test values(1,2),(3,4),(5,6)……<\/p>\n

    2. \u5047\u5982\u4ece\u4e0d\u540c\u5ba2\u6237\u63d2\u5165\u5f88\u591a\u884c\uff0c\u80fd\u901a\u8fc7\u4f7f\u7528INSERT DELAYED \u8bed\u53e5\u5f97\u5230\u66f4\u9ad8\u7684\u901f\u5ea6\u3002<\/p>\n

    DELAYED \u7684\u542b\u4e49\u662f\u8ba9INSERT \u8bed\u53e5\u8fde\u5fd9\u6267\u884c\uff0c\u5176\u5b9e\u6570\u636e\u90fd\u88ab\u653e\u5728\u5185\u5b58\u7684\u961f\u5217\u4e2d\uff0c\u5e76\u6ca1\u6709\u771f\u6b63\u5199\u5165\u78c1\u76d8\uff0c\u8fd9\u6bd4\u6bcf\u6761\u8bed\u53e5\u5206\u522b\u63d2\u5165\u8981\u5feb\u5f97\u591a\uff1bLOW_PRIORITY\u521a\u597d\u76f8\u53cd\uff0c\u5728\u6240\u6709\u5176\u4ed6\u7528\u6237\u5bf9\u8868\u7684\u8bfb\u5199\u5b8c\u540e\u624d\u8fdb\u884c\u63d2\u5165\u3002<\/p>\n

    3. \u5c06\u7d22\u5f15\u6587\u4ef6\u548c\u6570\u636e\u6587\u4ef6\u5206\u5728\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\u5b58\u653e<\/p>\n

    4. \u5047\u5982\u8fdb\u884c\u6279\u91cf\u63d2\u5165\uff0c\u53ef\u4ee5\u589e\u52a0bulk_insert_buffer_size\u53d8\u91cf\u503c\u7684\u65b9\u6cd5\u6765\u63d0\u9ad8\u901f\u5ea6\uff0c\u4f46\u662f\uff0c\u8fd9\u53ea\u80fd\u5bf9\u4e8eMyISAM\u8868\u4f7f\u7528\u3002<\/p>\n

    5. \u5f53\u4ece\u4e00\u4e2a\u6587\u672c\u6587\u4ef6\u4e2d\u88c5\u8f7d\u4e00\u4e2a\u8868\u65f6\uff0c\u4f7f\u7528LOAD DATA INFILE\u3002 \u8fd9\u901a\u5e38\u6bd4\u4f7f\u7528\u5f88\u591ainsert\u8bed\u53e5\u5feb20\u500d\u5de6\u53f3\u3002<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

    1. \u7b80\u4ecb \u5728Web\u5e94\u7528\u7a0b\u5e8f\u4f53\u7cfb\u67b6\u6784\u4e2d\uff0c\u6570\u636e\u6301\u4e45\u5c42\uff08\u901a\u5e38\u662f\u4e00\u4e2a\u5173\u7cfb\u6570\u636e\u5e93\uff09\u662f\u8981\u5bb3 …<\/p>\n

    \u7ee7\u7eed\u9605\u8bfb »<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.zhukunqian.com\/index.php?rest_route=\/wp\/v2\/posts\/324"}],"collection":[{"href":"https:\/\/blog.zhukunqian.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.zhukunqian.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.zhukunqian.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.zhukunqian.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=324"}],"version-history":[{"count":2,"href":"https:\/\/blog.zhukunqian.com\/index.php?rest_route=\/wp\/v2\/posts\/324\/revisions"}],"predecessor-version":[{"id":328,"href":"https:\/\/blog.zhukunqian.com\/index.php?rest_route=\/wp\/v2\/posts\/324\/revisions\/328"}],"wp:attachment":[{"href":"https:\/\/blog.zhukunqian.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=324"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.zhukunqian.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=324"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.zhukunqian.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=324"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}