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This article introduces the relevant knowledge of "how to use sql to find out the parameters directly". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Sometimes if you don't want to enter mysql, you can use the following sql

Mysql-uroot-p123456-e "show variables like'% cache%'"

Mysql-u root-p-e "use zxlh; select * from test"

# data is written to file

Mysql-uroot-p123456-e "use zxlh;select * from test;" > / opt/soft/mysql/data/test.sql

Warning: Using a password on the command line interface can be insecure. You can ignore it. it's just a warning.

# mysqladmin directly check the parameters every 2 seconds

Mysql extended-status-r-I 2 grep open_tables

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