On Tue, Jun 21, 2022 at 8:52 PM Peter Lieven <pl@xxxxxxx> wrote:
>
> Hi,
>
>
> we noticed that some of our long running VMs (1 year without migration) seem to have a very slow memory leak. Taking a dump of the leaked memory revealed that it seemed to contain osd and pool information so we concluded that it must have something to do with crush map updates. We then wrote a test script in our dev environment that constantly takes out osds and kicks then back in as soon as all remappings are done.
Hi Peter,
How did you determine what memory is being leaked?
>
> With that script running the PSS usage of the Qemu process is constantly increasing (main memory of the VM is in hugetblfs) in an order of about 5MB / day for a very small dev cluster with approx. 40 OSDs and 5 pools.
>
> We have observed this issue first with Nautilus 14.2.22 and then also tried Octopus 15.2.16 where some issues #38403 should have been fixed.
With the release of 15.2.17 in a few weeks, Octopus would be going
EOL. Given that this is a dev cluster, can you try something more
recent -- preferably Quincy?
Thanks,
Ilya
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