[PVE-User] OOM Killer problem

Alwin Antreich sysadmin-pve at cognitec.com
Sat Feb 4 12:35:12 CET 2017

Hi Michele,

On 02/04/2017 10:44 AM, Michele Bonera wrote:
> Hi.
> I have an issue with OOM Killer (Proxmox 4.4-5 - Kernel 4.4.35-1-pve) on
> my infrastructure: even if there is a lot of free memory (15GB used over
> 32GB available), OOM Killer is still killing my VM processes.

Are you over committing your machines?

Another consideration could be NUMA, if one node runs out of memory the
kernel might also kill processes.

> This morning I had 3 over 6 VM powered down because OOM Killer decided
> to kill the related processes even if there were a lot of free memory.
>       total       used       free     shared    buffers     cached
> Mem:  32725572   32286280     439292     196428    3772084   18648708
> -/+:   9865488   22860084
> Swap:  1499124      33736    1465388

It could also be possible that your swap space can't be utilized
properly due to your workload.

> This problem is related to all the server I have in the infrastructure
> (some are Supermicro, some are Dell) and occur randomly after some days
> the host is rebooted.
> I already instruct OOM Killer not to kill VM Processes, but I'm afraid
> it could kill processes related to the infrastructure.
> Is there someone with the same issue?
> Bye,


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