how to empty old graphs from mysql?

[Rno]

First you have to find which files is growing
du -h --max-depth=1

that will give you in Kb the space used, and only 1 level, then go down 1 level at time to find out which files (directory) grow

[majedz]

Very much thanks,
/var/lib/mysql is 17G
there are a bunch of mysqld-bin files which are large
mysqld-bin.000043 is 805MB and date changed today.
can these bin files be deleted? or do they control the graphs and messing with them would mess the graphs?

[Rno]

it's the database log.
take a look at this link
http://dba.stackexchange.com/questions/ ... -bin-files

I'm not an expert of mysql

[majedz]

Thank you very much, you solved my problem!