RE: [Xen-users] Minimal ram to use on Dom0

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of carlopmart
> Sent: 11 May 2007 17:11
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] Minimal ram to use on Dom0
> 
> Hi all
> 
>   i have a rhel5 server with 3GB of RAM and 4 xen guests running:
> 
>    - 1 Windows 2003 + Citrix PS 4.5 with 1 GB
>    - 2 Rhel5 guests with cluster suite and GFS with 640 MB of 
> ram in each one
>    - 1 rhel5 guest with 512 MB of RAM
> 
>    Total: 2.816 MB of RAM
> 
>   Dom0 "only have" 256 MB of ram. Is sufficient or do I need 
> to assign more RAM 
> on dom0? For guests, this ram is sufficient ... and I don't 
> need to do 
> migrations ...

Dom0 should be fine with 256MB. 

The other guests is pretty much up to you, because it depends on what
they are used for. The numbers you've given seem reasonable, but
ultimately, you have to "try and see". The memory usage in the guest is
so dependant on what you do within the guest that it's impossible to say
if 128MB or 4GB is the right amount of memory just based on what OS
you're going to run... A firewall may well fit in 64MB if you have a
stripped down version of OS to install. On the other hand, a
MySQL-server for web-serving that supports 4000 concurrent users may
want 4GB (or more!)... 

--
Mats
> 
>   Mnay thanks ..
> 
> 
> -- 
> CL Martinez
> carlopmart {at} gmail {d0t} com
> 
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