A readable, recent blog on big JVM heaps... They're bad, naughty, offer rubbish performance, but they're hard to dodge.
http://andrigoss.blogspot.com/2008/02/jvm-performance-tuning.html
Certainly, it's better than this effort from Tangosol/Coherence/Oracle ("Use our product!"). As it happens, I need to sort this for a badly built product based on Coherence... Oh! The pain!
