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IDS Forum

RES: Tunning CPU VPS and Processor Affinity

Posted By: Alberto Romeu Pessonio Filho
Date: Monday, 19 October 2009, at 2:14 p.m.

In Response To: Re: Tunning CPU VPS and Processor Affinity (Art Kagel)

Art:

Thanks again!!!!

I hope to start my tests next week, and I let you know about the
performance.

Regards,

Alberto Pessonio |DBA Informix Senior
IBM Certified Informix System Administrator V7
IBM Certified Informix Managing and Optimizing Databases V7
Tel. +55 11 4932 5147 | +55 11 7897 1458
NEXTEL ID +55 93*7118
www.orizonbrasil.com.br

-----Mensagem original-----
De: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] Em nome de Art
Kagel
Enviada em: segunda-feira, 19 de outubro de 2009 16:07
Para: ids@iiug.org
Assunto: Re: Tunning CPU VPS and Processor Affinity [17621]

Ignore the hyper threads and configure for the 8 physical cores. On a
2.9GHZ Xeon processor, I would not configure more than 3-4 CPU VPs per
core
on a dedicated IDS server machine. Less if you will be sharing the
machine
with client applications or other software depending on the percentage
of
resources you want to dedicate to IDS. On HPUX don't forget to set the
aging option in the VPCLASS entries (HPUX is rather predatory at
reducing
the priority of long running processes that do not have process aging
blocked). As to affinity, I'm not certain there's much to be gained from

affinity settings on he Xeon architecture. The memory interconnects are
quick and the processors are set up as SMP with equal access to all
resources (as opposed to Numa architecture where migrating a task/thread

from one processor group to another can be costly causing a physical
memory
copy).

Art

Art S. Kagel
Oninit (www.oninit.com)
IIUG Board of Directors (art@iiug.org)

Disclaimer: Please keep in mind that my own opinions are my own opinions
and
do not reflect on my employer, Oninit, the IIUG, nor any other
organization
with which I am associated either explicitly or implicitly. Neither do
those opinions reflect those of other individuals affiliated with any
entity
with which I am affiliated nor those of the entities themselves.

On Mon, Oct 19, 2009 at 1:42 PM, ALBERTO ROMEU PESSONIO FILHO <
arfilho@orizonbrasil.com.br> wrote:

> Hi everybody!
>
> I'm planning a migration from HP PA-RISC model RP3440 (4CPU X 2core)
with
> IDS
> 11.10 FC2 in HP-UX 11.10 to Dell PowerEdge Server R710 (2 Sockets Xeon

> 2.93GHz
> X 4Core with 2 threads per core - HyperThread) using IDS 11.50 FC5 in
Linux
> RHEL 5.
>
> My question is:
>
> How can I get the best performance with IDS setting CPU VPS and
Processor
> Affinity?
>
> When I execute the htop command on RHEL 5 to monitor my environment,
the
> Operating System "see" 16 processors.
>
> Does anybody has some tips?
>
> Thanks,
> Alberto.
>
>
>
>
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