Re: Low Memory Nodes

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How much RAM do you have, and how many OSDs?

This config should be considered close to the minimum:

   ceph config set osd osd_memory_target 1500000000

(1.5GB per OSD  -- remember the default is 4GB per OSD)

-- dan


On Fri, Nov 6, 2020 at 11:52 AM Ml Ml <mliebherr99@xxxxxxxxxxxxxx> wrote:
>
> Hello List,
>
> i think 3 of 6 Nodes have to less memory. This triggers the effect,
> that the nodes will swap a lot and almost kill themselfes. That
> triggers OSDs to go down, which triggers a rebalance which does not
> really help :D
>
> I already ordered more ram. Can i turn temporary down the RAM usage of
> the OSDs to not get into that vicious cycle and just suffer small but
> stable performance?
>
> This is ceph version 15.2.5 with bluestore.
>
> Thanks,
> Michael
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