Re: [PVE-User] A less aggressive OOM?

[Roland via pve-user <pve-user@lists.proxmox.com>]

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From: Roland <devzero@web.de>
To: Proxmox VE user list <pve-user@lists.proxmox.com>
Subject: Re: [PVE-User] A less aggressive OOM?
Date: Tue, 8 Jul 2025 14:05:54 +0200
Message-ID: <6b15b452-0fc6-41ee-a1f7-34cd7943ab38@web.de>

hi,

it's a little bit weird that OOM kicks in with VMs <32GB RAM when you 
have 64GB

take a closer look why this happens , i.e. why OOM thinks there is ram 
pressure

roland

Am 07.07.25 um 11:26 schrieb Marco Gaiarin:
> We have upgraded a set of clusters from PVE6 to PVE8, and we have found that
> in newer kernels, OOM is a bit more 'aggressive' and sometime kill a VMs.
>
> Nodes have plently of RAM (64GB, VMs are 2-3, each 8GB ram), VMs have qemu
> agent installed and ballooning enabled, but still sometime OOM happen.
> Clearly, if get OOM the main VMs that have the local DNS, we get some
> trouble.
>
>
> I've looked in PVE wiki, but found nothing. There's some way to relax OOM,
> or control their behaviour?
>
> In nodes there's no swap, so probably the best thing to do (but the hardest
> one ;-) is to setup some swap with a lower swappiness, but i'm seeking
> feedback.
>
>
> Thanks.
>

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