KSM Control Scripts

[Nikolai K. Bochev]

Yes, i know KSM is enabled by default, i just didn't know i can configure it through /etc/default/qemu-kvm .
After running the script for around 10 days i didn't notice any huge improvement ( the vm's were already running ).
I also didn't notice any increase in CPU usage with KSM_MONITOR_INTERVAL=60 ( loadavg stays around ~1 ).
The host machine is a 2xXeon5520 with 12G ram, running 6 VM's with total of 12G ram assigned to them ( yea i know it's pushing it ).
I have a scheduled downtime in two weeks and i'll see if i can get some tweaking going then.

----- Original Message -----
> Further to this....
> 
> 1. KSM is enabled and running by default in Ubuntu 10.04
> 2. The default polling scan frequency is left at the (perhaps
> egregious) upstream Linux kernel default of 20ms.
> 3. As Serge mentions, several people have complained about that being
> to frequent. Other people have complained about higher values being
> not frequent enough to be useful
> 4. In any case, this is totally and trivially configurable in your
> /etc/default/qemu-kvm file. Edit that to your heart's content and
> then 'sudo restart qemu-kvm'.
> 
> Cheers,
> :-Dustin

-- 


Nikolai K. Bochev 
System Administrator