That said, I think many people find that for a minimal dom0, not doing much
other work about 256MB is a reasonable amount of memory. Maybe you'd want to
go to 512MB if you had many guests and / or memory to spare. dom0's
requirements aren't extravagent, as long as you're not running loads of
things in it (which on a server you shouldn't, for security reasons).
Of course if you start running X and a modern desktop, you can expect dom0 to
have significantly higher memory requirements, just as a normal machine
would ;-)
Cheers,
Mark
On Monday 16 June 2008, Sandor W. Sklar wrote:
> On Jun 15, 2008, at 7:37 PM, Tim Post wrote:
> > On Sun, 2008-06-15 at 17:45 -0700, Sandor W. Sklar wrote:
> >> Well, of course, the amount of memory that a dom0 needs depends upon
> >> the service running within it. I guess I didn't word my question
> >> explicitly enough. Is there a formula for determine how much
> >> memory a
> >> dom0 might need, given a system with X amount of RAM, and X number of
> >> guests, assuming there are no other services running in the dom0?
> >
> > You are hoping to calculate the best possible density? I.e. give dom-0
> > xx MB per pv guest, xx MB per HVM guest?
>
> Indeed, exactly! Not exact numbers, but a guideline that would let me
> maximize the memory available to guests without running the risk of
> starving the dom0.
>
> > Even that is too broad to really pin down, it would really depend on
> > what you give the guests and how much they exercise the disks.
>
> OK, thanks, I guess I assumed as much, given that if such information
> existed, Google would have told me. :-)
>
> -s-
>
>
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