MySQL5.0 After that, I started to support profiling, For diagnosing a sql Resource consumption during execution , Through profiling To view slow sql How slow is it , So as to carry out reasonable optimization

* see profiling Whether it supports and opens show variables like '%profil%'
Variable_name Value
have_profiling( Yes no profiling) YES
profiling( Open or not profiling) ON
profiling_history_size(profiling Lines per display ) 15
* If it's above profiling The value of is 0 perhaps OFF, So on profile set profiling=1
* Start using profiling # Execute one sql select count(*) from vc # use profiling SHOW PROFILES

Query_ID: Queried ID
Duration: Execution time
Query: Specific implementation sql
You can find the one we just executed in the result sql
# adopt Query_ID see sql Specific implementation # Or through Show profile all for query 174 Find out more Show
profilefor query 174

Status: Indicates the implementation of this article sql Stage experienced
Duration: Time consumption of each stage

©2019-2020 Toolsou All rights reserved,
It's unexpected Python Cherry tree (turtle The gorgeous style of Library )Unity3D of UGUI Basics -- Three modes of canvas os Simple use of module computer network --- Basic concepts of computer network ( agreement , system )html Writing about cherry trees , Writing about cherry trees Some East 14 Pay change 16 salary , Sincerity or routine ?Unity-Demo Examples ✨ realization UI- Backpack equipment drag function 06【 Interpretation according to the frame 】 Data range filtering -- awesome java Four functional interfaces ( a key , simple )