Below are my settings
“C:\Java\Eclipse\MyEclipse Enterprise Workbench 5.1.0 GA\eclipse\eclipse.exe” -vm “C:\Java\Eclipse\MyEclipse Enterprise Workbench 5.1.0 GA\jre\bin\javaw.exe” -vmargs -Xms256M -Xmx1024M -XX:PermSize=128M -XX:MaxPermSize=256M
As you can see I have doubled everything. And the computer that I am using has 3GB of RAM, and 3.20 Ghz processor.
Thanks Tolga