Re: [Xen-users] how far can we go in terrm on scalability

[Heiko <rupertt@xxxxxxxxx>]

On Mon, Jan 5, 2009 at 2:52 PM, Thomas Halinka <lists@xxxxxxxxx> wrote:
> Hi Heiko,
>>
>> we have some dom0 running on 8 core Intel XeonCPU E5345 2.33GHz with 8GB Ram,
>> right now we have only 1GB to 2GB free on each dom0 and mostly only 3VM 
>> running.
>> Would it be possible for us to go to 16GB and add another 3-4 VM, or
>> go to 32GB and run up to 12VM on one machine?
>> Im not sure we activily use the VM Support that these CPU/Server come
>> with, how can I find more info about this out of xen?
>
> I have dom0 with 30 domUs and more in Production - no Problem. You have
> to care about your xm start/stop-behaviour because of the memory.
>
>>
Hello,

what are the specs of your system, how much rum and CPU do you have?
What exactly do you mean with the xm start/stop-behaviour?



>> Just thinking about what will be possible on our current hardware. Im
>> doing some RTG with cacti from our dom0 and the domU,
>> but the dom0 doesnt draw the network/cpu usage that the domU´s use,
>> are there more ways to get  performance/usage infos?
>
> write your own plugin using xm top.
>
Well,

when I look at xm top, the VM dont even take 1% in CPU usage most of
the time, and between 12% and 40% of the memory,
The dom0 CPU jumps to sometimes to 10%
when I can trust these values there is a lot ,more we can do on these
machines with some more RAM.


cheers


>> greets
>
> Regards,
>
> Thomas
>
>

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