Hi,
I have Tomcat 7.0.4 x64
I have set the Initial Mem Pool to 1024
Max Mem Pool to 3072
Thread Stack to 3000

Every second day I get java.lang.OutOfMemoryError: PermGen space
I have set the following in Env parameter JAVA_OPTS=
-server -XX:NewSize=256m -XX:MaxNewSize=256m -XX:PermSize=256m -XX:MaxPermSize=256m

What am I doing worng? which is the correct way to set the parameters?

Thanks,
Abhishek.

256M is big enough for permgen, try to check whether your JAVA_OPTS takes effect.