[Zope] New server recommendations

[Howard Hansen]

Thanks for the clarification. I had noted that Apache, Postgres, etc. could
use the other proc, but when I watch top running on the system, I see Zope
at the top 95% of the time, the Apache front end putters along at 1-2%, and
Postgres blips up to 3% every few minutes. The top process uses a lot more
cycles than either of the non-Zope daemons.  I don't expect this to change
much, which I why I lean towards 1 proc.

When I'm looking at systems, does Zope performance correlate well with the
pystone benchmark?

H


----- Original Message -----
From: "Oliver Bleutgen" <myzope@gmx.net>
To: "Howard Hansen" <zope@halfmagic.com>
Cc: <zope@zope.org>
Sent: Sunday, September 15, 2002 3:15 AM
Subject: Re: [Zope] New server recommendations


> Howard Hansen wrote:
>
> >>From recent discussions, it appears that Zope doesn't benefit much from
a
> > dual processor system, but it does benefit from higher clock rates and
more
> > RAM.  So should I invest in a faster single-proc system with a couple of
> > gigs of RAM, or go with a slower dual-proc box?
>
>
> I wouldn't state it this way. From what I read from various posts,
> there's a subtle difference to what you said.
>
> - A system which has more daemon processes running than zope (likely)
> can profit from multiprocessor configs, because the processes will
> spread across processors.
>
> - There is a problem with mulitproc configs when the zope process
> wanders between procs (cache coherency and whatnot), so the os having
> the possibitilty to restrict process to single processors is a big
> advantage.
>
>
> cheers,
> oliver