MySQL : 30GB of binlogs in 6 Hours
If you want to erase all binary logs older than 30 minutes, do this

mysql&gt; PURGE BINARY LOGS BEFORE NOW() - INTERVAL 30 MINUTE;


If you want to erase all binary logs except the last one, do this

mysql&gt; PURGE BINARY LOGS BEFORE NOW();


If you want to erase all binary logs before midnight, do this

mysql&gt; PURGE BINARY LOGS BEFORE DATE(NOW()) + INTERVAL 0 SECOND;


If you want to erase all binary logs before midnight 3 days ago, do this

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


I have discussed deleting binary logs like this before


Apr 26, 2013 ; Is it safe to delete mysql-bin files?
May 28, 2014 : Freeing up disk space in &#39;mysql\data&#39;


Give it a Try !!!