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: Thu, 10 Jul 2025 18:11:41 +0200
Message-ID: <98ace9cf-a47f-40cd-8796-6bec3558ebb0@web.de>

imho, killing processes because of arc using too much ram which can't be 
reclaimed fast enough is a failure in overall memory coordination.

we can set zfs limits as a workaround, yes - but zfs and oomkiller is to 
blame !!!

1. zfs should free up memory faster, as memory is also freed from 
buffers/caches

2. oomkiller should put pressure on arc or try reclaim pages from that 
first, instead of killing kvm processes.  maybe oomkiller could be made 
arc-aware!?

roland


 >On 7/10/2025 11:08 AM, Roland via pve-user wrote:
 >if OOM kicks in because half of the ram is being used for 
caches/buffers, i would blame OOMkiller or ZFS for tha. The problem 
should be resolved at zfs or memory management level.

 >Absolutely no!
 >You are responsible for giving ZFS the limits. As even described in 
the proxmox documentation here:
 >https://pve.proxmox.com/wiki/ZFS_on_Linux#sysadmin_zfs_limit_memory_usage

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Am 10.07.25 um 16:49 schrieb dorsy via pve-user:
> On 7/10/2025 11:08 AM, Roland via pve-user wrote:
> if OOM kicks in because half of the ram is being used for 
> caches/buffers, i would blame OOMkiller or ZFS for tha. The problem 
> should be resolved at zfs or memory management level.
>
> Absolutely no!
> You are responsible for giving ZFS the limits. As even described in 
> the proxmox documentation here:
> https://pve.proxmox.com/wiki/ZFS_on_Linux#sysadmin_zfs_limit_memory_usage
>
>> _______________________________________________
>> pve-user mailing list
>> pve-user@lists.proxmox.com
>> https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-user
>
>
>
> _______________________________________________
> pve-user mailing list
> pve-user@lists.proxmox.com
> https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-user

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