Re: [Xen-users] Use of memory on Dom0 ?

["Olivier B." <xen.list@xxxxxxxxx>]

Fajar A. Nugraha a écrit :
> On Thu, Feb 11, 2010 at 10:04 PM, Olivier B. <xen.list@xxxxxxxxx> wrote:
>   
> > Hi,
> >
> > I have two hosts with 48GB of memory. On each of them I will run multiple
> > DomU which will use near 24GB of memory : I keep 24GB of unused memory on
> > each servers to allow migrate of all VM on only 1 host.
> >
> > So my question : is there a usefull way to use the 24GB of memory on the
> > dom0 ? As a "big" disk cache for example ? (but all my domUs use drbd
> > devices...).
> >     
> What kind of domU are you running? If it's PV, you should be able to
> use "memory" and "maxmem". So for example you have this on domU config
> file
>
> memory = "1000"
> maxmem = "2000"
>
> It will start with 1000MB memory, but you can extend it up to 2000 MB
> online with "xm mem-set" without having to reboot domU. When you need
> to migrate some domUs, you can reduce its memory usage back to the
> original.
>
>   
You're right, it's a solution yes (all my domU are PV).
But how does it works if a software use "1800" of that memory, and I 
reduce it to 1000 ?
Or maybe is there a way to reserve this memory for disk caching only ?


_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users