Re: [Xen-users] Why limit dom0's memory?

[Rudi Ahlers <Rudi@xxxxxxxxxxx>]

Sandor W. Sklar wrote:
> On Jun 14, 2008, at 5:35 AM, Gastón Keller wrote:
>
> > >  I have this wrong, or am I not understanding something?
> > AFAIK what some people is doing is setting a level of memory for Dom0
> > for it to never go down that level (giving memory to the guests). That
> > is, if you set the memory to 1 GB, Dom0 will allocate all your memory
> > except for that 1 GB. It's a way of ensuring that Dom0 will never run
> > out of memory.
> Ah, thanks!  That makes sense.  Is there some formula for determining 
> how much memory a dom0 might need, given a system with X amount of 
> RAM, and X number of guests?
>     -s-
The "formula" would largely depend on what you're going to run on dom0, 
and is roughly the same as for a domU instance. On a VPS server, which 
only serves domU VPS, you probably won't need more than 512MB RAM. All 
our VPS servers run min. 512MB RAM, which is enough for SSH, FTP, exim, 
Squid, syslogd, etc to run. All the other services (MySQL, Apache, 
PostgreSQL, etc) are run from the domU VPShth
--

Kind Regards
Rudi Ahlers
CEO, SoftDux

Web:   http://www.SoftDux.com
Check out my technical blog, http://blog.softdux.com for Linux or other 
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