本文介绍了测量实际的 MySQL 查询时间的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!
问题描述
如何测量查询的执行时间而不测量它等待锁定释放等所花费的时间?我唯一的想法是不断测量相同的查询并记录最快的时间.
解决方案
用
启动探查器SET profiling = 1;
然后执行您的查询.
与
显示个人资料;
您会看到分析器具有统计信息的查询列表.最后选择要检查的查询
显示查询 1 的配置文件;
或您查询的任何数字.
您得到的是一个列表,其中列出了查询期间花费的确切时间.
手册中的更多信息.>
How can I measure the execution time of a query without measuring the time it spends waiting for a lock release etc? My only idea was to continuously measure same query and record the fastest time.
解决方案
Start the profiler with
SET profiling = 1;
Then execute your Query.
With
SHOW PROFILES;
you see a list of queries the profiler has statistics for. And finally you choose which query to examine with
SHOW PROFILE FOR QUERY 1;
or whatever number your query has.
What you get is a list where exactly how much time was spent during the query.
More info in the manual.
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