 <p>Do yourself a favour and buy another 2Gb RAM. I'm running the 32 bit kernel (i.e. the smaller one) right now on my MBP and the kernel itself has 800Mb RAM wired. For you that would leave 1.2Gb in total for everything else. That's not enough. Believe me, if you buy the extra RAM, not only will your Java process be better, but <em>everything</em> will seem much snappier.</p>