[PVE-User] Question about memory management

Martin Maurer martin at proxmox.com
Thu Jun 2 09:56:55 CEST 2011

Use KSM.


Br, Martin

> -----Original Message-----
> From: pve-user-bounces at pve.proxmox.com [mailto:pve-user-
> bounces at pve.proxmox.com] On Behalf Of CDR
> Sent: Donnerstag, 02. Juni 2011 08:25
> To: proxmoxve
> Subject: [PVE-User] Question about memory management
> I am using KVM and I found a fatal, unsurmountable issue with Windows Virtual
> machines. It turns out that if I assign 5 GB to a Windows 2003 or Windows 2008
> Virtual machine, the whole amount of memory is taken from the host, without
> considering that only about 350 Mb of the total is actually being used. This is
> insane. I opened a support ticket with Red Hat, and they claim that Windows
> zeros out all memory and that by doing so, it appears to be in use. So they
> laughed at me. But, hey, I replied, Vmware has that feature working fine since
> years ago. In fact, I checked on my own Vsphere 4.1 servers and the windows
> machines show a very large difference between the memory assigned,
> nominally, to the virtual machine and the actual memory used by it in the host.
> So, if they solved t, why Red Hat claims that there is no solution?
> Any idea?
> Federico
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