mysql logs fills up space !!!

Hello All,
We have RH9 server with mysql 4 on it.Recently one of my partion /var filled up to 100%.I checked for cause and found that server-bin.xxx files are eating space on disk.Thses are bin log files .
So i did flush logs etc and ultimately deleted those files.Now it is ok.
What should I can do for thses bin log files whose sizes vary from 10Mb to 1Gb.We have logrotation in place but I am not sure.
Please help ....
THank you.

 

 

 

 

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