All VM Startup options..

All the VM options along with their meaning:

http://java.sun.com/javase/technologies/hotspot/vmoptions.jsp

upgrade master link

Link for all types of upgrade:( J2EE )

http://download.oracle.com/docs/cd/E15523_01/upgrade.htm

Upgrade from iAS to Weblogic Server

Link for the documentation:
http://download.oracle.com/docs/cd/E15523_01/upgrade.1111/e10126/toc.htm