[gpfsug-discuss] frequent OOM killer due to high memory usage of mmfsd

[Christian Petersson]

Hi,
This is a settings, we had the exact same issue in the past and when we
change the following parameters it has never killed the CES nodes anymore.

maxFilesToCache=1000000

maxStatCache=100000


Thanks

Christian

On Wed, 6 Sept 2023 at 20:59, Christoph Martin <martin at uni-mainz.de> wrote:

> Hi all,
>
> on a three node GPFS cluster with CES enabled and AFM-DR mirroring to a
> second cluster we see frequent OOM killer events due to a constantly
> growing mmfsd.
> The machines have 256G memory. The pagepool is configured to 16G.
> The GPFS version is 5.1.6-1.
> After a restart mmfsd rapidly grows to about 100G usage and grows over
> some days up to 250G virtual and 220G physical memory usage.
> OOMkiller tries kill process like pmcollector or others and sometime
> kills mmfsd.
>
> Does anybody see a similar behavior?
> Any guess what could help with this problem?
>
> Regards
> Christoph Martin
>
> --
> Christoph Martin
> Zentrum für Datenverarbeitung (ZDV)
> Leiter Unix & Cloud
>
> Johannes Gutenberg-Universität Mainz
> Anselm Franz von Bentzel-Weg 12, 55128 Mainz
> Tel: +49 6131 39 26337
> martin at uni-mainz.de
> www.zdv.uni-mainz.de
>
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>


-- 
Med Vänliga Hälsningar
Christian Petersson

E-Post: Christian.Petersson at isstech.io
Mobil: 070-3251577
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