Re: [Xen-devel] How much memory does a domain REALLY use...

[nick@xxxxxxxxxxxxxx (Nick Craig-Wood)]

Keir Fraser <keir@xxxxxxxxxxxxx> wrote:
>  On 26/2/07 12:41, "Nick Craig-Wood" <nick@xxxxxxxxxxxxxx> wrote:
> >>  Yes, there's an overhead of 7MB per 1GB on i386, and 12MB per 1GB
> >>  on x86/64.
> > 
> > Some time ago (xen 3.0.2 I think) I measured the overhead on i386 to be
> > 
> >   12 MB per domain
> 
>  Do you mean 12MB static overhead for Xen itself? There is no 12MB overhead
>  per guest, unless you are talking about HVM guests in which case there is
>  some shadow-pagetable overhead (I'm not sure it's as much as 12MB
>  though).

Yes 12 MB for Xen is what I meant, not per domain - sorry!

> >   plus 6MB per GB host RAM
> > 
> > I guess it has gone up since the above figures fit the 7MB amount much
> > better

-- 
Nick Craig-Wood <nick@xxxxxxxxxxxxxx> -- http://www.craig-wood.com/nick

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