MySQL how to delete old binary logs

MySQL how to delete old binary logs

 

You should not just delete your MySQL old binary logs.

You need to let mysqld do that for you.

The file mysql-bin.[index] keeps a list of all binary logs mysqld has generated and auto-rotated. The mechanisms for cleaning out the binlogs in conjunction with mysql-bin.[index] are:

PURGE BINARY LOGS TO 'binlogname';

Or:

PURGE BINARY LOGS BEFORE 'datetimestamp';

These will clear all binary logs before the binlog or timestamp you just specified.

For example, if you run

PURGE BINARY LOGS TO `mysql-bin.000223`;

this will erase all binary logs before mysql-bin.000223.

If you run:

PURGE BINARY LOGS BEFORE DATE(NOW() - INTERVAL 3 DAY) + INTERVAL 0 SECOND;

this will erase all binary logs before midnight 3 days ago.

If you want to have binlog rotated away automatically and keep 3 days woth, simply set this:

mysql> SET GLOBAL expire_logs_days = 3;

then add this to /etc/my.cnf

[mysqld]
expire_logs_days=3

and mysqld will delete them logs for you.

This is pretty much it!



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2019-11-05 09:31:05