[Xen-users] Re: minimum memory requirement for dom0

[Matthew Palmer <mpalmer@xxxxxxxxxxx>]

On Mon, May 28, 2007 at 08:15:26PM -0700, Markus Hardiyanto wrote:
> When i create a domU i got this error message:
> 
> I need 512000 KiB, but dom0_min_mem is 262144 and shrinking to 262144 KiB
> would leave only 218580 KiB free
> 
> the hardware server have 1024MB of RAM and there is 1 domU running with
> 500MB, I'm planning to have 2nd domU with 500MB of RAM too, but i got that
> error message.
> 
> 2 x 500 MB would leave 24MB for the dom0.
> 
> what is the minimum RAM needed for dom0? if the dom0 is not running other
> applications, only xen.

You might be able to run (or crawl) with perhaps 32MB, but personally I set
my limit to at least 128MB -- the last thing you want is for your dom0 to be
swapping mercilessly while you're trying to get something useful done.

Shaving 50MB off each of your domUs shouldn't do any major harm, and it's
not as though a stick of RAM is a bankrupting cost these days.

- Matt

-- 
Q: Why do Marxists only drink herbal tea?
A: Because proper tea is theft.
                -- Chris Suslowicz, in the Monastery

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