Does the perm size is include in the heap size?

[avihai marchiano]

Thank you

[Mike Simmons]

It shouldn't be. And if you try starting a JVM with more perm space than heap space, it doesn't seem to be a problem.

[avihai marchiano]

Are you sure it is not part of the heap size?


Thank you

[Mike Simmons]

Maybe I didn't understand your question. I can start a JVM with more perm size than heap - you can too. For example:

java -Xm256M -Xmx256M -XX:PermSize=512M MyClass

I would think that since the PermSize is 512 MB while the heap size is only 256 MB, that proves that the perm size is not part of the heap size. Or have I misunderstood what you are asking?
[ August 03, 2008: Message edited by: Mike Simmons ]

[rajesh bala]

Atleast Sun JVM doesn't include PermSize in the heap. PermSize is separate in Sun JVM. However, in some JVMs like BEA its calculated along with heap size.

[avihai marchiano]

Thank you!!!