I'm considering an upgrade from 32bit Xeons to 64bit EMT64 Xeons. Has anyone had any experience running Redhat 3/4 x86_64 with 64bit JVMs and JBoss? Any performance increases? Any caveats?
We are in the proocess of doing this exercise very soon (beginning of next month) , using SUSE 9.0 on that. So might publsih results fot that here and on my blog as well.