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How to delete slow log file in MySQL

If you use

rm -f slow.log
to delete the slow query file in mysql, you need to run

flush slow logs;

shell> mysqladmin flush-logs

to release the file.

 You can use

$ sudo -i lsof -p `pid-of-mysqld` | grep -n "slow.log"
to verify it.

See also

How to deal with Big Slow Query Log in MySQL


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