Hello, I cannot get ride of those strange blockings of zope. This happens from time to time and leads some times to minutes without action from Zope. I increased threads pool and decreased it, I use a much bigger object cache (memory is not an issue on the machine) and I pured the database (with help of an extra machine) Zope stucks with about 18% processor use and does almost nothing at the moment. Any posibility for an dead-lock? Help is very appreciated! Configuration: Zope 2.1.4, ZODBC, Database-Size: 66MB (after purify) Some sessions with unsafed work, 50 threads for pool, NT 4.0 (ok, this sux, but we have to use ODBC with strange Databases) Tino Wildenhain