Xen users - Sep 2009 - how much memory for dom0?

I''m planning my first production xen instance. My question is about how
to
determine how much memory I need for Dom0.

The scenario is simple. I have a machine with 12G of ram. I want to run a
single web server as a DomU, giving it as much cpu and memory as possible.
The docs say that Dom0 needs a minimum of 512M. Am I likely to need more
than that? Is there a method of figuring what a Dom0 needs? What factors
affect this? What''s the realistic minumum for a machine with a lot of
network traffic?

If this question is answered elsewhere and I missed it, feel free to curtly
point me in the right direction. Any help is appreciated.


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On Wed, Sep 30, 2009 at 10:59 AM, <maillists0@gmail.com> wrote:
> I''m planning my first production xen instance. My question is
about how to
> determine how much memory I need for Dom0.
>
> The scenario is simple. I have a machine with 12G of ram. I want to run a
> single web server as a DomU, giving it as much cpu and memory as possible.
> The docs say that Dom0 needs a minimum of 512M. Am I likely to need more
> than that? Is there a method of figuring what a Dom0 needs? What factors
> affect this? What''s the realistic minumum for a machine with a lot
of
> network traffic?
>
> If this question is answered elsewhere and I missed it, feel free to curtly
> point me in the right direction. Any help is appreciated.
>
> Let it run as default and monitor the Dom0 memory usage and decide from
there. I usually run my Dom0s with 512MB.

Grant McWilliams


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