Re: osd_memory_target ignored

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Quoting Frank Schilder (frans@xxxxxx):
> Dear Stefan,
> 
> is it possible that there is a mistake in the documentation or a bug? Out of curiosity, I restarted one of these OSDs and the memory usage starts going up:
> 
> ceph      881203 15.4  4.0 6201580 5344764 ?     Sl   09:18   6:38 /usr/bin/ceph-osd --cluster ceph -f -i 243 --setuser ceph --setgroup disk
> 
> The documentation of ods_memory_target says "Can update at runtime: true", but it seems that a restart is required to activate the setting, so it can *not* be updated at runtime (meaning it takes effect without restart).

Ah, that might be. If the documentation states it can be updated at
runtime it's a bug (in eiter the code or the documentation).
> 
> 
> In addition to that, I would like to have different default memory
> targets set for different device classes. Unfortunately, there seem
> not to be different memory_target_[devide class] default options. Is
> there a good way to set different while avoiding to bloat "ceph config
> dump" unnecessarily?

I'm afraid not. You might want to file a tracker issue with an
enhancement request.

Gr. Stefan

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