bin files in var/log/mysql

[Brent Clark <bclark@eccotours.co.za>]

Hi all

I saw all a few bin files in var/log/mysql.

trinity:/var/log/mysql# ls -la
total 5760
drwxr-s---  2 mysql adm    4096 2006-05-18 07:47 .
drwxr-xr-x 13 root  root   4096 2006-05-18 08:13 ..
-rw-rw----  1 mysql adm  145221 2006-05-13 07:35 mysql-bin.000133
-rw-rw----  1 mysql adm  178978 2006-05-14 07:35 mysql-bin.000134
-rw-rw----  1 mysql adm   99868 2006-05-15 07:58 mysql-bin.000135
-rw-rw----  1 mysql adm   97529 2006-05-16 07:52 mysql-bin.000136
-rw-rw----  1 mysql adm   73481 2006-05-17 07:52 mysql-bin.000137
-rw-rw----  1 mysql adm  422265 2006-05-18 07:47 mysql-bin.000138
-rw-rw----  1 mysql adm  248005 2006-05-18 14:07 mysql-bin.000139
-rw-rw----  1 mysql adm     800 2006-05-18 07:47 mysql-bin.index

Could anyone please tell me what are these for, and I would like to know how come they dont get compress / rotated. It seem like files will just keep on getting created with out
 old files been deleted.

Kind Regards
Brent Clark