[Zope] Zope vs Plone: performance issues!

[Dario Lopez-Kästen]

Hugo Ramos wrote:
> Well... They were already using Zope's cache and Squid to proxy some static HTML
> I guess the problem is Plone itself... Skins etc...
> 

eh, sorry for probably stating the obvious. you menationed in an earlier 
mail that you have good hardware. If this hardware is multi-cpu then I 
suggest that you use some tool (i.e. taskset on linux) to bind each zope 
python process to a single cpu.

Threaded python applications does not work well in multi-cpu settings 
where there is a chance of a threaded python process being spread out 
over more than one CPU. I causes a, sometimes signinficant, performance 
loss.

Just by binding the zope python processes to a single CPU (not 
necessarily the same, just make sure that any single python process is 
not spread over more than one CPU) you will notice a preformance increase.

And like all the others said, Caching is you friend. Start by checking 
the ZODB cache numbers in the zope-conf file (too start simple). IIRC, 
the default is 5000 objects. Increase that to, say 50.000 or so (you 
mention that you have a busy site).

Good luck.

/dario

-- 
-- -------------------------------------------------------------------
Dario Lopez-Kästen, IT Systems & Services Chalmers University of Tech.
Lyrics applied to programming & application design:
"emancipate yourself from mental slavery" - redemption song, b. marley