{"id":10006116,"date":"2022-08-05T18:32:23","date_gmt":"2022-08-05T10:32:23","guid":{"rendered":"https:\/\/ityet.com\/?p=10006116"},"modified":"2022-08-05T18:32:23","modified_gmt":"2022-08-05T10:32:23","slug":"%e5%87%a0%e7%a7%8d%e5%b8%b8%e8%a7%81%e7%9a%84mysql-polardb-mysql%e5%9b%9e%e6%94%b6%e8%a1%a8%e7%a9%ba%e9%97%b4%e6%96%b9%e6%b3%95%e5%af%b9%e6%af%94","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006116","title":{"rendered":"\u51e0\u79cd\u5e38\u89c1\u7684MySQL\/PolarDB-MySQL\u56de\u6536\u8868\u7a7a\u95f4\u65b9\u6cd5\u5bf9\u6bd4"},"content":{"rendered":"

\u7b80\u4ecb\uff1a\u00a0\u5f53\u6211\u4eec\u9891\u7e41\u7684\u5220\u9664\u8868\u4e2d\u7684\u6570\u636e\u540e\uff0c\u788e\u7247\u5c31\u4f1a\u53d8\u591a\uff0c\u6709\u7ecf\u9a8c\u7684DBA\u5c31\u4f1a\u56de\u6536\u8868\u7a7a\u95f4\uff0c\u56de\u6536\u8868\u7a7a\u95f4\u6709\u597d\u51e0\u79cd\u65b9\u5f0f\uff0c\u6211\u4eec\u8981\u9009\u62e9\u54ea\u4e00\u79cd\u5462\uff1f\u80cc\u666f\u4e3a\u4ec0\u4e48\u9700\u8981\u56de\u6536\u8868\u7a7a\u95f4\uff1f\u4efb\u4f55\u4e00\u4e2a\u5b58\u50a8\u6216\u60a8\u8d2d\u4e70\u7684\u5b9e\u4f8b\u89c4\u683c\u90fd\u6709\u5bb9\u91cf\u9650\u5236\uff0c\u5e76\u4e14\u6839\u636e\u5b58\u50a8\u4ecb\u8d28\u4e0d\u540c\uff0c\u4fdd\u5b58\u65b9\u5f0f\u4e0d\u540c\uff0c\u76f8\u5e94\u5730\u6210\u672c\u4e5f\u4f1a\u4e0d\u540c\u3002\u5728\u7ebf\u6570\u636e\u5e93\u7684\u5b58\u50a8\u6210\u672c\u662f\u6bd4\u8f83\u9ad8\u7684\uff0c\u6240\u4ee5\u67b6\u6784\u5e08\u548cDBA\u5728\u7cfb\u7edf\u8bbe\u8ba1\u4e4b\u521d\u5c31\u8981\u8003\u8651\u6ee1\u8db3\u672a\u6765\u51e0\u5e74\u5185\u7684\u4e1a\u52a1\u9700\u6c42\uff0c\u540c\u65f6\u53c8\u80fd\u6700\u5927\u5316\u5730\u8282\u7701\u6210\u672c\uff0c\u8fd9\u662f\u6bd4\u8f83\u5408\u7406\u7684\u67b6\u6784\u5e03\u5c40\u548c\u5bb9\u91cf\u89c4\u5212\u7684\u65b9\u6cd5\u3002\u800c\u5927\u591a\u6570\u7cfb\u7edf\u662f\u6ca1\u6709\u7ecf\u8fc7\u4ee5\u4e0a\u6b65\u9aa4\u76f4\u63a5\u4e0a\u7ebf\u7684\uff0c\u8fd9\u79cd\u968f\u7740\u4e1a\u52a1\u7684\u53d1\u5c55\u5728\u7ebf\u6570\u636e\u4f1a\u4fdd\u7559\u7684\u8d8a\u6765\u8d8a\u591a\uff0c\u5f53\u5b58\u50a8\u5bb9\u91cf\u4e0d\u591f\u65f6\u53ef\u4ee5\u901a\u8fc7\u5347\u7ea7\u5b9e\u4f8b\u89c4\u683c\u6216\u786c\u4ef6\u89e3\u51b3\uff0c\u4f46\u5982\u679c\u6ca1\u6709\u66f4\u5927\u7684\u89c4\u683c\u65f6\uff0c\u53ea\u80fd\u5220\u9664\u6570\u636e\u56de\u6536\u8868\u7a7a\u95f4\u4e86\u3002\u56de\u6536\u8868\u7a7a\u95f4\u7684\u5e38\u89c1\u65b9\u6cd5\u5728\u5220\u9664\u56de\u6536\u8868\u7a7a\u95f4\u65f6\uff0c\u901a\u5e38\u6709\u4ee5\u4e0b\u51e0\u79cd\u65b9\u6cd5\uff1a\u7f16\u53f7\u5220\u9664\u65b9\u6cd5\u56de\u6536\u65b9\u6cd5\u9002\u5408\u573a\u666f\u5f0a1CREATE TABLE A’ LIKE A;INSERT INTO A’ SELECT FROM A WHERE ;DROP TABLE A;RENAME\u00a0TABLE\u00a0A’ TO A;DROP TABLE A;\u4fdd\u7559\u6570\u636e\u5c11\uff0c\u5220\u9664\u6570\u636e\u591a\uff1b\u4f46\u8981\u6781\u77ed\u65f6\u95f4\u6682\u505c\u6e90\u8868\u4e0a\u7684\u6570\u636e\u5199\u5165\uff08\u901a\u5e38\u6beb\u79d2\u7ea7\u522b\u5b8c\u6210\uff09\uff1b\u53ef\u80fd\u4f1a\u5f15\u8d77\u6027\u80fd\u6296\u52a82DELETE <\/em> FROM A WHERE ;ALTER TABLE A ENGINE=INNODB;\/OPTIMIZE TABLE A;ALTER TABLE A ENGINE=INNODB;\/OPTIMIZE TABLE A;\u4fdd\u7559\u6570\u636e\u591a\uff0c\u5220\u9664\u6570\u636e\u5c11\uff1b\u5efa\u8baeDELETE\u65f6\u7528DMS\u7684\u65e0\u9501\u6570\u636e\u53d8\u66f4(\u53c2\u8003https:\/\/help.aliyun.com\/docum…<\/a>)\uff0c\u5426\u5219DELETE\u65f6\u4e5f\u53ef\u80fd\u5f15\u8d77\u6027\u80fd\u6296\u52a8\u53ef\u80fd\u4f1a\u5f15\u8d77\u6027\u80fd\u6296\u52a83ALTER TABLE A DROP PARTITION partition_name;ALTER TABLE A DROP PARTITION partition_name;\u5206\u533a\u8868\u53ef\u80fd\u4f1a\u5f15\u8d77\u6027\u80fd\u6296\u52a84DROP TABLE A_0000\/A_20100101;DROP TABLE A_0000\/A_20100101;\u5df2\u7ecf\u4eba\u4e3a\u5206\u8868\u5b58\u50a8\u8bbe\u7f6e,\u5982\uff1a\u6309\u53d6\u6a21\u6216\u65e5\u671f\u5206\u8868\u53ef\u80fd\u4f1a\u5f15\u8d77\u6027\u80fd\u6296\u52a8\u00a0\u9488\u5bf9DROP TABLE A\u53ef\u80fd\u4f1a\u5e26\u6765\u7684\u6027\u80fd\u6296\u52a8\u53ef\u4ee5\u901a\u8fc7\u963f\u91cc\u4e91\u5185\u6838\u7ecf\u8fc7\u7279\u6b8a\u4f18\u5316Purge Large File Asynchronously(https:\/\/help.aliyun.com\/docum…<\/a>)\u9ed8\u8ba4\u5df2\u7ecf\u6253\u5f00\u3002\u800c\u5bf9\u4e8eALTER TABLE\u7684\u64cd\u4f5c\uff0c\u76ee\u524d\u4e1a\u754c\u5f00\u6e90\u7684\u6709gh-ost\u3001pt-online-schema-change\u548cOnlineSchemaChange\uff0c\u963f\u91cc\u4e91RDS 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TABLE [tbname] ENGINE=INNODB;\u7f16\u53f734237\u9ec4\u8272\u66f2\u7ebf\uff0c\u57fa\u51c6oltp_insert\u6d4b\u8bd5+\u5173\u95edDMS\u7684\u65e0\u9501\u53d8\u66f4+RDS kernel ALTER TABLE [tbname] ENGINE=INNODB;\u7f16\u53f734239\u7070\u8272\u66f2\u7ebf\uff0c\u57fa\u51c6oltp_insert\u6d4b\u8bd5+\u5173\u95edDMS\u7684\u65e0\u9501\u53d8\u66f4+RDS kernel OPTIMIZE TABLE [tbname];
\"\u56fe\u7247\"
\u4ee5\u84dd\u8272\u57fa\u7ebf\u4e3a\u57fa\u51c6\uff0c\u4ece\u56fe\u4e2d\u53ef\u4ee5\u770b\u51fa\u7eff\u8272\u66f2\u7ebf\u76f8\u8f83\u4e8e\u540c\u6837\u662f\u6267\u884c\u56de\u6536\u8868\u7a7a\u95f4\u7684\u9ec4\u8272\u548c\u7070\u8272\u5e73\u7a33\uff0c\u4f46\u6301\u7eed\u65f6\u95f4\u8f83\u957f\uff1b\u7eff\u8272\u3001\u9ec4\u8272\u3001\u7070\u8272\u66f2\u7ebf\u5230\u6700\u540e\u90fd\u4f1a\u4e34\u65f6\u8868\u91cd\u547d\u540d\u6210\u6b63\u5f0f\u8868\u7684\u8fc7\u7a0b\uff0c\u6700\u591a2s\u3002\u6d4b\u8bd5\u7ed3\u8bba\u7ed3\u5408\u5b9e\u9645\u4e1a\u52a1\u6765\u8bf4\u63a8\u8350\u6027\u80fd\u6bd4\u8f83\u7a33\u5b9a\u7684DMS\u65e0\u9501\u53d8\u66f4+ALTER TABLE\u3002\u4f7f\u7528DMS\u7684\u65e0\u9501\u53d8\u66f4\u53ef\u4ee5\u6253\u5f00DMS\u63a7\u5236\u53f0\uff0c\u5728\u9875\u9762\u9876\u90e8\uff0c\u9009\u62e9\u5168\u90e8\u529f\u80fd > \u6570\u636e\u65b9\u6848 > \u65e0\u9501\u53d8\u66f4\u3002
\"\u56fe\u7247\"
\u6ce8\u610f\u4e8b\u9879\u4e0d\u652f\u6301\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u4e3b\u952e(dms\u662f\u4e00\u5757\u4e00\u5757\u7684\u62f7\u8d1d\uff0c\u6700\u5927\u503c\u548c\u6700\u5c0f\u503c\u786e\u5b9a\u62f7\u8d1d\u8303\u56f4\uff0c\u7136\u540e\u5206\u6210\u82e5\u5e72\u5757\u62f7\u8d1d\uff0c\u4f1a\u7528\u5230\u5f88\u591amin max\u8ba1\u7b97\u8303\u56f4\u7684SQL)\u53c2\u8003\u5982\u4f55\u7528DMS\u8fdb\u884c\u65e0\u9501\u7ed3\u6784\u53d8\u66f4(https:\/\/help.aliyun.com\/docum…<\/a>)\u5173\u4e8eoptimize\u548calter\u7684\u539f\u7406(https:\/\/developer.aliyun.com\/…<\/a>)\u00a0\u539f\u6587\u94fe\u63a5\uff1ahttps:\/\/click.aliyun.com\/m\/10…<\/a>\u672c\u6587\u4e3a\u963f\u91cc\u4e91\u539f\u521b\u5185\u5bb9\uff0c\u672a\u7ecf\u5141\u8bb8\u4e0d\u5f97\u8f6c\u8f7d\u3002<\/p>\n

https:\/\/segmentfault.com\/a\/1190000042276513<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

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