Java Linux 64 bit PermGen options?

Running $ java -version java version "1.7.0_03" Java(TM) SE Runtime Environment (build 1.7.0_03-b04) Java HotSpot(TM) 64-Bit Server VM (build 22.1-b02, mixed mode) While I already have -XX:MaxPermSize=256m, I'm still getting PermGen space failure. Are there some other command line options to use? Thanks