Dan Armbrust wrote: > On a 32 bit system, the cap is somewhere between 1.2 and 2 GB. It seems > to vary a bit from platform to platform, and VM to VM, but its > definitely a hard limit. Sun's documentation on what that hard limit > will be per platform is rather sketchy... but the JVM simply won't start > with a -Xmx value higher than the magic limit number for your hardware > configuration. As I'm one of the people that maintains that documentation let me know how we can improve it ;-) The Sun JVM will run up to -Xmx at 4 GB (well around 3880) on those operating systems that will support it. > Gotta go 64 bit if you want to use higher -Xmx numbers. Higher than 4 GB (less a little bit for native stack space, etc.) Regards, --Tom