From mboxrd@z Thu Jan  1 00:00:00 1970
From: Johannes Stezenbach <js@sig21.net>
Subject: Re: KVM and the OOM-Killer
Date: Thu, 13 May 2010 15:42:16 +0200
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References: <4BEBEE8F.9050508@jrcs.co.uk>
 <4BEBF2F8.7020507@redhat.com>
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Cc: James Stevens <James.Stevens@jrcs.co.uk>, kvm@vger.kernel.org
To: Avi Kivity <avi@redhat.com>
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On Thu, May 13, 2010 at 03:39:20PM +0300, Avi Kivity wrote:
> On 05/13/2010 03:20 PM, James Stevens wrote:
> >
> >General advice seems to be, if you have more than 16Gb RAM then
> >you should run the VM host 64bit.
> >
> >We didn't see this issue on a server with 32Gb running the same
> >set of VMs.
> >
> 
> I'd go with 64-bit at 2GB and above.  It's both faster and safer.

There's an interesting posting from Linus which explains details:
http://www.realworldtech.com/forums/index.cfm?action=detail&id=78966&threadid=78766&roomid=2


HTH,
Johannes