solaris10/weblogic10 memory and -d64 boost

Question

What is the impact to put -d64 into the Liferay 5.2, weblogic 10 over Solaris environment? What is the impact of choosing Xms=Xmx=8GB and PermGen=1g, in that setup.

[Hands on experience: I see some Null exceptions occasionally, but the application is on and I don't see problems data, or visually. It's a test environment, not any production. ]

Thank you for any comment

Answer 1

These options impact performance so there will not be any functional impact to your application.

-d64 explained : What impact, if any, does the -d64 switch have on Sun JVM resident memory usage?

Xms=Xmx=8GB, PermGen=1g : These are Heap Size settings, these will influence the GC algorithm running time.