Hi Everyone, I have an application that gains a large memory footprint very quickly, in casual testing 100M in an hour or so. I have a largeish ZCatalog with extra PathIndexes, using Plone, Archetypes and various other custom code. Using LeakFinder I get lots of BTree stuff from ZCatalog queries. It looks like it's being created legitimately but what's keeping the references to them and how to go about finding out? In the java world I would use a memory profiler to follow the reference chain till it went where it shouldn't. Is there such a thing for python? If not how does one go about working out whats keeping the memory? BTrees.IOBTree.IOBucket 18479 4476 BTrees.OOBTree.OOBucket 9587 1992 BTrees.IIBTree.IISet 5273 1172 DateTime.DateTime.DateTime 3725 424 Acquisition.ImplicitAcquirerWrapper 1231 218 Products.PlacelessTranslationService.GettextMessageCatalog.GettextMessageCat alog 641 212 AccessControl.User.User 276 196 Dylan Jay Web Builder dylan@pretaweb.com --- www.pretaweb.com - Reliable & responsive CMS website development www.meetmemap.com - makes giving directions easy www.eatmanifesto.com - Traditional Sustainable and Delectable Ph:+61(0)423198306 ~ Y!+Skype:dylan_jay ~ ICQ:520341 ~ SIP:djay@babble.net