Re: OSD memory usage after cephadm adoption

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Hello Luis,

Please see my response below:

But when I took a look on the memory usage of my OSDs, I was below of that
> value, by quite a bite. Looking at the OSDs themselves, I have:
>
>     "bluestore-pricache": {
>         "target_bytes": 4294967296,
>         "mapped_bytes": 1343455232,
>         "unmapped_bytes": 16973824,
>         "heap_bytes": 1360429056,
>         "cache_bytes": 2845415832
>     },
>
> And if I get the running config:
>     "osd_memory_target": "4294967296",
>     "osd_memory_target_autotune": "true",
>     "osd_memory_target_cgroup_limit_ratio": "0.800000",
>
> Which is not the value I observe from the config. I have 4294967296
> instead of something around 7219293672. Did I miss something?
>
>
This is very likely due to https://tracker.ceph.com/issues/48750. The fix
was recently merged into
the main branch and should be backported soon all the way to pacific.

Until then, the workaround would be to set the osd_memory_target on each
OSD individually to
the desired value.

-Sridhar
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