Hey Chris, Yep i do accept that the client performing the test could be at fault but that may not be the case here. A 20 user test load is as fishy as the rest...:D. The test is for a duration of 15mins. Hit rate remains constant at 150 hits/sec. Suddenly post 7th minute Zope goes for a toss. This is really surprising. Initially i was under the impression that the test for 50 imultaenous users was taking the server down. But now even this test for 20 uses post the 7th minute send zope for a toss. Hit rate falls from 150 hits/sec to <40hits per sec and resp times more than quadruple. ZopeDB caching 20000 + Threads for Zope at 10 + ZODB thread pool at 10. Should i look at apache/zope mix???. Havent tried out RaMCacheManager yet. Or whatever that was. Trevor ===== ( >- -< ) /~\ __ Scaling FLOSS in the __ /~\ | \) / Enterprise : trevor.w@pvision.biz \ (/ | |_|_ \ Call Now: 9820349221 / _|_| \____________________________________/ __________________________________ Do you Yahoo!? SBC Yahoo! - Internet access at a great low price. http://promo.yahoo.com/sbc/