[xenpreview-dev] boot ine dom0_mem=memory

[Manzer, Kirk]

Normally I specify 1 GB, most of my servers have more than 12 GB of
memory.  It is overkill at 1 GB but would rather fall on the side of
safe.  This is a base dom0 doing nothing but running XEN and domUs.  If
dom0 is also doing other tasks I allocate addition memory to ensure no
memory contention.  You could run with 512mb for dom0, but you would
have to be confident in what dom0 is doing, and that things like
automatic updates to the OS do not cause problems.


Kirk A. Manzer 
HP
TSG Solution Alliances, Linux
Phone: (281)-514-4979 
Cell: (832)-563-8120 
Fax: (281)-514-5802 
kirk.manzer at hp.com 


-----Original Message-----
From: Jan.Albrecht at bertelsmann.de [mailto:Jan.Albrecht at bertelsmann.de] 
Sent: Wednesday, May 09, 2007 12:52 PM
To: Manzer, Kirk
Cc: xenpreview-dev at forge.novell.com
Subject: RE: [xenpreview-dev] boot ine dom0_mem=memory

Hi, 

> -----Original Message-----
> From: Manzer, Kirk [mailto:kirk.manzer at hp.com] 
> Sent: Wednesday, May 09, 2007 7:34 PM
> 
> I have been using the dom0_mem parameter on the kernel for a while. I
> limit dom0 to either 1 or 2 GB of memory depending on what 
> the server is
> doing, then I have no issues starting and domUs.  Prior to using
> dom0_mem I was constantly having issues with starting domUs.

Can you specify "depending on what the server is doing"?
I'm running databases in 2 of the domains, one is just testing and one
for development (compiling etc.)
When does your dom0 need 1GB and on the other hand 2GB? I would suggest
the dom0 should always use as less memory as possible?

Jan