[Zope] zodb Q

hi all, i still can't make out how zodb works. i see that it increases it's sizes after a while. if i pack, it shrinks back. what is really happening? i read in previous threads, all unreferenced objects are kept until packed. will cache garbage collection do this? will frequent garbage collection (30 sec) help? the site i'm maintaining has a phenomenal zodb size increase. when i pack, it goes down from 550M to 20M. this is in one day. i wonder how zope.org tackles this? how can i do this automatically? read zope admin and content manager guide, but there's only brief rundowns. any pointers, docs, howtos apreciated. tq -- -- ------------------------------------------------------ http://www.kedai.com.my/kk Am I Evil?