2010/1/26 Leon Rosenberg <rosenberg.l...@googlemail.com> > Another customer of mine was playing with gc settings for nearly a > year, because his tomcats collection times went higher and higher, and > after a short look at the heap dump with jmap and jhat, we found out > that he had 100.000.000 uncollectable garbage objects in the heap (2/3 > of his heap actually). Instead of investigating his heap pollution he > spent 11 month playing with gc options to setup a faster gc. In the > end the problem was solved in two days. > > Definitely. I've had the same in Smalltalk, the same in C# under the CLR. Fewer live objects in the heap = faster GC. Creating fewer short-lived objects = less time spent in GC and in tenuring objects. Almost always, the root of a GC performance problem isn't the GC at all :-).
- Peter
