Does 64bit remove Xmx ceiling in practice?
issue http://bugs.sun.com/view_bug.do?bug_id=4408373 is quite problematic for us, since different machines can have different max values for Xmx, even if their physical memory is the same. When deploying a default configuration for our client application this limits the value you can set for this Xmx value.
I recently did a test on a 64bit machine with a 64bit jre and I was able to set a value of 20g for Xmx for a machine with 4g physical ram! Does this mean that in a 64bit environment this value can more easily be set to a higher value as a default configuration?