newbie questions

hello list :D we just got an opteron 244 server we're going to be using for benchmarking an in-house app against other architectures... we're running suse 8.1 i'll cut to the chase: 1) is the default compile/build behavior to take advantage of amd64 (ie: if i d/l the apache tarball and compile it, do i need to do anything special?) 2) is the default jvm modified to take advantage of amd64, or do i have to wait for the linux/jvm team to release their version of 1.4.2, or something else? (reported build is: 1.3.1, J2RE 1.3.1 IBM build cxia32131-20020622) that's it for now, but i'll prolly have more later... sorry if the questions are a little low-brow, but we all gotta start somewhere :) TIA -- john