[PVE-User] OOM Killer problem

[Michele Bonera]

On 04/02/2017 12:35, Alwin Antreich wrote:

> 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?

Not at all: the total amount of RAM assigned to the VMs running on this 
node is 12GB (and the host has 32GB).

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

This is plausible. I'll do some checks... Thanks for the hint.

>> 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.

I exclude this: the cpu utilization rarely exceed 20%

Bye
-- 
Michele Bonera
www.zipoware.com