Re: Very high memory usage with KVM

[Avi Kivity <avi@redhat.com>]

On 07/25/2009 08:43 PM, Daniel Bareiro wrote:
> Hi all!
>
> I have an installation with Ubuntu Hardy Heron server amd64 with KVM-62
> from Ubuntu repositories installed on an HP Proliant DL380 G5 with two
> Xeon E5405 quadcore processors and 16 GiB of RAM which has six VMs with
> the following configuration of memory:
>
> Hostname       |      RAM
> ===============+===============
> Ganimedes      |    2 GiB
> Os             |    1 GiB
> Aprender       |    2 GiB
> Aps0           |    2 GiB
> Aps2           |    4 GiB
> Ratatoskr      |    4 GiB
> ===============+===============
> TOTAL          |   15 GiB
>
>
> Initially the host was created with a swap partition of 1 GiB (more 1
> GiB than was free for use of host) but this amount with the time
> remained short and I had to add a LV of 7 GiB to be used with swap,
> being now a total of 8 GiB of swap of which at this moment I have only a
> 9% free. Is 'normal' this use of memory?
>
> root@ss02:~# ps -e --sort -rss -Ho user,start_time,pid,pcpu,pmem,rss,size,vsz,args
> USER     START   PID %CPU %MEM   RSS    SZ    VSZ COMMAND
> [...]
> root     Jul06 27471 52.3 24.4 4023232 4292200 4350296   kvm<ratatoskr>
> root     Jul24  9955  137 23.8 3923620 4308592 4350308   kvm<aps2>
> root     Jul06  8751  5.8  8.3 1368228 2171808 2229888   kvm<aps0>
> root     Jul07  8565  2.7  5.2 862844 2204704 2246416   kvm<aprender>
> root     Apr22  7842  0.6  3.6 600072 2172056 2230136   kvm<ganimedes>
> root     Jul01  7944  0.6  2.0 334860 1119916 1177996   kvm<os>
>
> root@ss02:~# free
>               total       used       free     shared    buffers     cached
> Mem:      16463388   16377844      85544          0     894216      66328
> -/+ buffers/cache:   15417300    1046088
> Swap:      8319948    7621916     698032
>
>
> Updating to KVM-84 or superior can improve this situation?
>    

What is the storage configuration?  Are you using qcow2?  What are the 
image logical and physical sizes?

What is the host kernel (uname -a)?

-- 
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