Hi all, Not sure if this is the right list or not, please let me know if I should redirect my question. When I try to run "Update security settings" in the portal_workflow tool, my zope process gradually swallows up all the cpu, seems to still be running fine, but then after a couple of hours, swallows up all the memory, the load on the server exceeds 4 and makes it pretty well unresponsive. I have about 35,000 objects in the ZODB. Has anybody had any similar experience or know of any hints as to how I should debug this? I tried following the guidelines on this website: http://www.zope.org/Members/4am/debugspinningzope but couldn't see anything that was actually stuck. Zope 2.9.5, Python 2.4.4, Plone 2.5.1 Thanks for any advice, Edmund