Show profile It is disabled by default , It is used to record the time spent by queries running in the server and other data related to query execution status changes .

 

The current system is win10,Mysql The version is 8.0.15

1. View the current profiling To configure

show variables like 'profiling%'

2. Modify... At the session level profiling To configure

set profiling =1

I'm executing this sentence is , Back to me

0 row(s) affected, 1 warning(s): 1287 '@@profiling' is deprecated and will be removed in a future release.

Look at the tip , It seems that the later version profiling There will be changes

3. see profile Record

show profiles

When a query is submitted to the server , This tool records profiling information to a temporary table , And give each query a from 1 The starting integer identifier .

4. To drill down into the distribution of the execution time of a query

show profile for query < Integer identifier >

 

Is learning , If there are mistakes or deficiencies , Please point out the communication .