From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Sylvain COUTANT <sylvain.coutant@illicom.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: High CPU usage (up to server hang) under heavy I/O load
Date: Fri, 13 Aug 2004 23:16:05 +0100 [thread overview]
Message-ID: <1092435364.24960.35.camel@localhost.localdomain> (raw)
In-Reply-To: <20040813140229.4F48B2FC2C@illicom.com>
On Gwe, 2004-08-13 at 15:01, Sylvain COUTANT wrote:
> I have a problem with one server (DELL, 1 TB RAID5 + RAID0, Bi-Xeon, 8 GB
> RAM) which, sometimes, goes mad when the I/O pressure gets too high. We use
> this server as a VMWare server and as a backup server (200 GB are dedicated
> to the backup part). We have run full hardware diags and checked every
> software that runs on the system. We have been able to reproduce the problem
> once without having launched the VMWare server (so I believe this software
> is not responsible for the problem).
>
> We have tested kernels 2.4.22 and 2.4.26. The server is running under Debian
> Woody.
Is your raid controller 64bit capable ? If you can I'd also go to a 2.6
kernel for anything > 1Gb, and definitely > 4Gb of RAM. The differences
are astounding although if your PCI I/O hardware cant do 64bit access
your box will suck whatever kernel 8)
next prev parent reply other threads:[~2004-08-13 23:18 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-13 14:01 High CPU usage (up to server hang) under heavy I/O load Sylvain COUTANT
2004-08-13 15:36 ` Matt Domsch
2004-08-13 15:46 ` Sylvain COUTANT
2004-08-14 3:39 ` Tom Sightler
2004-08-15 9:11 ` Lenar Lõhmus
2004-08-15 20:30 ` Sylvain COUTANT
2004-08-16 12:43 ` Matt Domsch
2004-08-13 16:20 ` Marcelo Tosatti
2004-08-13 17:53 ` Sylvain COUTANT
2004-08-16 10:11 ` Sylvain COUTANT
2004-08-16 11:49 ` Sylvain COUTANT
2004-08-13 22:16 ` Alan Cox [this message]
2004-08-16 9:13 ` Mark Watts
2004-08-16 10:57 ` Alan Cox
2004-08-16 12:10 ` Mark Watts
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