Hello everyone, I'm trying to figure out what I can set all (I know) Zope Parameters to to get a good overall performance on our "old" live installation. We have a new System with upgraded Zope and the like in the making but untill then I'm trying to keep what is up smooth and stable. Machine: Dual Pentium with 4Gig Ram running on Suse Linux. Zope 2.7.2 with Python 2.3.4 and ZMS for the Sites. There's a recent Apache 1.3.x in Front for caching and like 25 Sites running on the system, some very rarely visited some more loaded. While running the system with out-of-the-box-parameters at times of high load the RAM went full, the machine started swapping and spiraling down so I started to set limits in Apache and Zope. I was mostly just guessing! Apache is set to "MaxClients 50" Zope.conf has set "zserver-threads 5" and <zodb_db main> cache-size 500 pool-size 25 ... </zodb_db> With this settings the machine tops at load around 1.8 - 2 and no swapping takes place *puuh* but still users sometimes, too often for users taste, get to wait a minute and longer for their page. For me it tastes like a garbage collection or whatnot because after 5-20 minutes everything is fine again for an hour or two... - Apaches "MaxClients" is set for general limit - zserver-threads: How many ppl, approx., can connect with this set to 5? Would be good to synchronize this with the apache settings somehow? - cache-size: This is per DB connection (pool-size) as I have learned, I did set this down to limit memory usage - pool-size: number of concurrent DB-Connections as I learned. Does every concurrent connection have to have it's own db-connection or do N zserver-threads share one? What I'm looking for is general advice how these parameters work and can be set for best cooperation. Or if there are other Params that I have missed yet ;) E.g. "every zserver-thread uses one db-connection and can server one user so for 50 concurrent users you have to set everything to 50 and tweak cache-size according to 'Cache Parameters' in the Zope config and your RAM-load behaves" Which is nonsense I bet but something like that would help me great time. Thanks in Advance for any Help! /Carsten ------------------------------------------------------------------------ Carsten Germer Deutsches Elektronen Synchrotron (Web-Office, IT) phone: +49-40-8998-1661 Notkestr. 85 web: http://wof.desy.de 22607 Hamburg e-mail: carsten.germer@desy.de Germany ------------------------------------------------------------------------