Tomcat 6.x memory settings on Windows Server 2008 X64 bit

Open regedit (Start->Run enter regedit and press enter). Find this key:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Apache Software Foundation\Procrun 2.0\Tomcat6\Parameters\Java

Double click on “Options” name and append with these parameters:

-XX:MaxPermSize=394M
-Xms256m
-Xmx512m

Restart “Apache Tomcat” service.