Permgen

-XX:PermSize<size> - Set initial PermGen Size.

-XX:PermSize<size> -XX:MaxPermSize<size> - Set the maximum PermGen Size.

Windows

setenv.bat

set JAVA_OPTS=-Dfile.encoding=UTF-8 -Xms128m -Xmx1024m -XX:PermSize=64m -XX:MaxPermSize=256m

Linux

setenv.sh

export JAVA_OPTS="-Dfile.encoding=UTF-8 -Xms128m -Xmx4024m -XX:PermSize=64m -XX:MaxPermSize=256m"

-XX:+CMSClassUnloadingEnabled -XX:+UseConcMarkSweepGC

-XX:PermSize=128m -XX:MaxPermSize=256m