The document at

http://java.sun.com/docs/hotspot/gc5.0/gc_tuning_5.html

needs some corrections. I down loaded that document and
made the corrections. The updated document can be found at

/net/jano.sfbay/export/disk05/hotspot/public_html/GC/draft/gc_tuning15/6287810/gc_tuning_5.html

This should be pushed out to the public location.