[Zope] Advice for performance checking/tuning

[Hannu Krosing]

Hi

We are investigating use of Zope for a portal that will have 
about ~500.000 users.

However our test shows that zope is only capable of delivering 
about 4 request/sec of medium complexity page on dual PIII 833 
which seems way too low.

We did our tests to straight Zope 2.3.4 (no apache or squid in 
front of it). Even when told to use 10 thread only 4 were active
in top (others were there but were idle) and load average was 
never over 30%.

Where/what should I start investigating ?

Where do I find some docs on what makes zope extremely slow (I 
have found that <dtml-if xxx> where xxx is missing or overly 
complex authorization schemes can do it, but what else) ?

--------------
Hannu