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From: Rik van Riel <riel@conectiva.com.br>
To: Roger Larsson <roger.larsson@skelleftea.mail.telia.com>
Cc: Adam Goldstein <Whitewlf@Whitewlf.net>,
	<linux-kernel@vger.kernel.org>, Adam Taylor <iris@servercity.com>
Subject: Re: Very High Load, kernel 2.4.18, apache/mysql
Date: Tue, 24 Sep 2002 22:28:23 -0300 (BRT)	[thread overview]
Message-ID: <Pine.LNX.4.44L.0209242223040.22735-100000@imladris.surriel.com> (raw)
In-Reply-To: <200209250259.12810.roger.larsson@skelleftea.mail.telia.com>

On Wed, 25 Sep 2002, Roger Larsson wrote:

> Have you been able to determine if it is I/O bound or CPU bound?
> Or maybe using to much CPU to do I/O?
>
> Does anyone know what virtual memory system does Mandrake uses?

If it's IO bound, it's quite possible the problem is the disk
elevator and Andrew Morton's read-latency2 patch might help
somewhat (if the system is heavy on both reads and writes).

If the system is short on RAM and/or swapping, that might be
a VM thing or just a shortage of RAM...

It would make sense to study the output of top and vmstat for
a few hours to identify exactly what the problem is, instead
of trying to fix all kinds of random things that aren't the
core problem.

regards,

Rik
-- 
Bravely reimplemented by the knights who say "NIH".

http://www.surriel.com/		http://distro.conectiva.com/

Spamtraps of the month:  september@surriel.com trac@trac.org


  reply	other threads:[~2002-09-25  1:23 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-09-24 23:27 Adam Goldstein
2002-09-25  0:59 ` Roger Larsson
2002-09-25  1:28   ` Rik van Riel [this message]
2002-09-25  2:38     ` Adam Goldstein
2002-09-25  5:24       ` Simon Kirby
2002-09-25  6:56         ` Adam Goldstein
2002-09-25  7:20           ` Simon Kirby
2002-09-25  7:51             ` Paweł Krawczyk
2002-09-25 13:13       ` Rik van Riel
2002-09-25 22:54       ` Jose Luis Domingo Lopez
2002-09-26 17:09       ` Joachim Breuer
2002-09-26 17:16         ` Rik van Riel
2002-09-25  3:50     ` Bernd Eckenfels
2002-09-25  3:48 ` Bernd Eckenfels
     [not found] <3D90FD7B.9080209@wanadoo.fr>
2002-09-25  1:12 ` Adam Goldstein
     [not found] <0EBC45FCABFC95428EBFC3A51B368C9501AF4F@jessica.herefordshire.gov.uk>
2002-09-25 20:16 ` Adam Goldstein
2002-09-25 21:26   ` Roger Larsson
2002-09-26  3:03   ` Ernst Herzberg
2002-09-26 18:36     ` Marco Colombo
2002-09-26 19:27       ` Rik van Riel
2002-09-26 20:02         ` Marco Colombo
2002-09-26 20:09           ` Rik van Riel
2002-09-26 20:25         ` Ernst Herzberg
2002-09-27  8:52       ` Martin Brulisauer
2002-10-01  5:36   ` David Rees

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