Experiencing occasional long garbage collection delays, why?

Question

I\'m having a hard time dealing with a Java garbage collection problem, and interpreting the logs.

My application requires that no GC takes longer than 2 seconds, and id

Answer 1

for me problem was full survivor spaces. As CMS isn't compactional, garbage was promoted directly to old gen. this could be very expensive with such large heap. It's necessary to increase Survivor spaces and MaxTenuringThreshold to avoid promotion as much as possible.

regards, Alex