[MySQL]通过Profiles查看create语句的执行时间消耗_MySQL
一,查看profiles的状态值
1,查看profiles是否已经打开了,默认是不打开的。
mysql> show variables like '%pro%';
我查看一下profiles里面没有东西,所以公司服务器里面profile是没有打开的,我查看了一下mysql变量,果然是OFF的。
二,打开profiles,然后测试
1,开启profiles
2,check下状态值,果然已经开启了,为ON
3,测试
mysql> create table test_cpny.listed_cpny_fin_rpt_prd
mysql>
mysql>
5,再check
看来时间消耗在| Sending data | 29.96599 |上面啊!
补充于2014-09-16
profiling_history_size
The number of statements for which to maintain profiling information if <code class="literal">profiling is enabled. The default value is 15. The maximum value is 100. Setting the value to 0 effectively disables profiling. See Section 13.7.5.32, “<code class="literal">SHOW PROFILES Syntax”.

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