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xen-users
Re: [Xen-users] Memory Sizing Guidelines
Christian Horn wrote:
On Fri, Oct 19, 2007 at 09:46:36AM -0400, Paul Waldo wrote:
I have searched in vain on google for tips on memory sizing but have had
no luck. What are the guidelines for allocating memory amongst the Dom0
and the DomUs?
dom0: advises range from reserving 128MB to 512MB if you arent running heavy
applications in dom0 (which should be moved into domUs).
domU: The kernel and applications running there handle memory as they do
on usual servers, so size as usual here, mainly depending on the
applications you will run.
As an example, I have a Xen server that has 2 GB memory. I want to
create 2 DomUs. If these were standalone machines, 1GB each would be
fine. How would I partition this memory under Xen?
256MB for dom0, rest split up for the 2 domU would be my guess.
Christian
Thanks for the reply, Christian. The only services I plan on running
on dom0 are ones that support the domU, so it should be pretty light.
I guess the main issue is disk caching. Linux uses free memory to
cache disk, so where should that happen, the dom0 or the domU?
Paul
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