[PVE-User] Windows7, memory ballooning, ksm, weird memory consumption

Eneko Lacunza elacunza at binovo.es
Tue Dec 9 09:47:09 CET 2014


This may be due to Windows zeroing memory on boot.

What memory usage do you have on Proxmox node? It there is 20% RAM free, 
then KSM won't hunt the rest of zeroed memory pages, nor will reclaim 
the memory the balloon driver (is it installed?)


On 07/12/14 19:55, Pongrácz István wrote:
>  Hi,
> I have a strange issue with the latest PVE and windows 7.
> The problem is the huge memory reservation and opposite memory 
> reports. Only one windows7 is running without any usage, but the 
> memory consumption is huge, including ksm.
> The memory config for the windows7 VM:  2GB (min.) / 22GB (max.)
> Processor config:  4 (1 socket, 4 cores) [Nehalem]
> VM status reports:    Memory usage: Total 22GB ;  Used: 1.86GB
> PVE RAM usage:  Total: 31.39GB; Used:  23.02GB;   KSM:  8.22GB
> The used memory inside the VM is the same as the VM reports, around 
> 1.86GB.
> So, I do not really understand the situation.
> What do you think about  this kind of memory usage? Is this normal?
> I use zfs on linux, I checked the memory configuration of it (arc 
> limited to 2GB), so, we can forget the zfs as problem source.
> Any idea?
> Thanks,
> István
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