Tim Verhoeven wrote: > On Wed, Jun 11, 2008 at 4:46 PM, Ruslan Sivak <russ at vshift.com> wrote: > >> While it seems to make sense (and both xentop and virsh nodeinfo) show the >> right amount of memory, even when I shut down one of the VM's, free and top >> still think I only have 6GB of ram. >> > > That is normal, the memory that was used by VM's is not automatically > returned to the dom0 and therefore won't show when running free and > top. > > Regards, > Tim > > I guess it has something to do with the ballooning driver for Dom0. It looks like I just tried to allocation too much memory to DomU and the box went down hard. I think there's a setting in xen to the min amount of memory to go down to, but I'm not sure why Dom0 is using 600mb of RAM. Is there a mini installation of CentOS that I can do that would use less RAM? I've already unchecked all the boxes when installing CentOS. I would like Dom0 to be as small as possible, both due to RAM usage and from a security perspective. Russ