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这个人很懒，什么都没有留下～

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性能测试-性能常见问题及优化方法

1、SQL执行时间长问题现象：系统响应时间长、数据库cpu高。问题原因：全表扫描、索引低效、排序溢出。解决方法：通过数据库快照查看执行时间长的SQL，查看该SQL执行计划，在cost比较高的SQL上增加合适索引。要求所有大表SQL执行计划的cost低于100，超过100的SQL要评审。对于排序溢出、可参考数据中心规范设置排序堆大小，规范中排序堆设置为AUT…

Claire
性能测试 2022年4月8日

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