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Date: Tue, 24 Sep 2002 22:28:23 -0300 (BRT)
From: Rik van Riel <riel@conectiva.com.br>
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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
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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/

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