Re: Low CPU Usage - Mailing list pgsql-performance

From brauagustin-susc@yahoo.com.ar
Subject Re: Low CPU Usage
Date
Msg-id 311295.56511.qm@web30010.mail.mud.yahoo.com
Whole thread Raw
In response to Low CPU Usage  (brauagustin-susc@yahoo.com.ar)
Responses Re: Low CPU Usage
List pgsql-performance
Hola Beto.
I have no idea where to look for that configuration or settings.
Yesterday I red about some drivers problems with SATA disk working togheter with IDE devices with DMA.

Mi server server is a Pentium VI 3.3 with hyper threading (enabled in BIOS), HP Proliant ML 110.

Then I entered to the BIOS and saw in IDE Configuration:
  ATA/IDE Configuration                    [Enhanced]
          Configure SATA as                   [IDE]  => it has RAID option too

I have any idea how to continue!!! I don't know if this a SATA problem, a configuration problem or what else. I have installed several servers beggining with postgres 6.4 and I've neved had this kind of problems (always with IDE disks). I think this is a problem with SATA disk i/o, but I don't see how to measure that (I have already set postgresql.conf).

Regards
Agustin


----- Mensaje original ----
De: Norberto Meijome <beto@octantis.com.au>
Para: brauagustin-susc@yahoo.com.ar
CC: pgsql-performance@postgresql.org
Enviado: jueves 20 de septiembre de 2007, 7:53:05
Asunto: Re: [PERFORM] Low CPU Usage

On Wed, 19 Sep 2007 12:13:33 -0700 (PDT)
brauagustin-susc@yahoo.com.ar wrote:

> max_stack_depth = 7MB #in the old server is 8MB but if I set in here give me the ulimit error

Hola Agustin :)
otro argentino en el extranjero x aca ;)

anyway, back to English ;)

a long shot but...

check if you have any limits set on the host for CPU usage... you may be
limited to x number of secs / % by the OS scheduler. When you query your CPU,
it will say u are only using 5% or so...

chau,
Beto

_________________________
Norberto Meijome
Octantis Pty Ltd

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