Hi there, During the hackathon I had some discussions around GC on large heaps.
This guy, who seems to know what he is talking about, and had a patch accepted in hotspot jdk, said in 2011 that he's got a configuration working reasonably well with large heaps at that time : "I was able to keep GC pause on 32Gb Oracle Coherence storage node below 150ms on 8 core server." (in http://java.dzone.com/articles/how-tame-java-gc-pauses) There is a lot of stuff in his blog, some of it in Russian only, but at least one of us will understand it. http://blog.ragozin.info/2011/07/openjdk-patch-cutting-down-gc-pause.html http://fr.slideshare.net/aragozin/garbage-collection-in-jvm-mailru-fin Cheers, Nicolas
