JVM Size on 64bit Red Hat 5.5 max size?!

Hi,
I was researching about the possibility of increasing the heap size on a Jazz Team Server deployed on WAS 7 and running on Red Hat 5.5 64bit.
Considering we are on a 64bit Red Hat in WAS 7 here are my questions:
is the bundled JVM 64bit (the WAS 7 one)? If so, that means it will be able to allocate more than 4Gb of RAM, correct? Else, if the JVM isn't 64bit, even on a 64bit operating system it won't make a difference if we allocate more than the maximum addressable RAM, correct?
Thanks in advance,
I was researching about the possibility of increasing the heap size on a Jazz Team Server deployed on WAS 7 and running on Red Hat 5.5 64bit.
Considering we are on a 64bit Red Hat in WAS 7 here are my questions:
is the bundled JVM 64bit (the WAS 7 one)? If so, that means it will be able to allocate more than 4Gb of RAM, correct? Else, if the JVM isn't 64bit, even on a 64bit operating system it won't make a difference if we allocate more than the maximum addressable RAM, correct?
Thanks in advance,
3 answers

You can run "java -version" to see more information. In a 64 bit distribution I would assume a 64 bit JVM. In general I am careful when downloading distribution which architecture to choose (32/64 bit).
For the JVM settings see: https://jazz.net/jazz/resource/itemName/com.ibm.team.workitem.WorkItem/198140
For the JVM settings see: https://jazz.net/jazz/resource/itemName/com.ibm.team.workitem.WorkItem/198140