On Fri, Oct 5, 2018 at 9:33 AM Hervé Ballans
<[email protected]> wrote:
>
> Hi all,
>
> I have just configured a new value for 'mds_cache_memory_limit'. The output 
> message tells "not observed, change may require restart".
> So I'm not really sure, has the new value been taken into account directly or 
> do I have to restart the mds daemons on each MDS node ?

That one is handled at runtime, shouldn't need a restart.  The command
line's output is a little bit misleading, as we currently just lack
the internal knowledge to say whether a given config setting requires
a restart or not.

John

> $ sudo ceph tell mds.* injectargs '--mds_cache_memory_limit 17179869184';
> 2018-10-04 16:25:11.692131 7f3012ffd700  0 client.2226325 ms_handle_reset on 
> IP1:6804/2649460488
> 2018-10-04 16:25:11.714746 7f3013fff700  0 client.4154799 ms_handle_reset on 
> IP1:6804/2649460488
> mds.mon1: mds_cache_memory_limit = '17179869184' (not observed, change may 
> require restart)
> 2018-10-04 16:25:11.725028 7f3012ffd700  0 client.4154802 ms_handle_reset on 
> IP0:6805/997393445
> 2018-10-04 16:25:11.748790 7f3013fff700  0 client.4154805 ms_handle_reset on 
> IP0:6805/997393445
> mds.mon0: mds_cache_memory_limit = '17179869184' (not observed, change may 
> require restart)
> 2018-10-04 16:25:11.760127 7f3012ffd700  0 client.2226334 ms_handle_reset on 
> IP2:6801/2590484227
> 2018-10-04 16:25:11.787951 7f3013fff700  0 client.2226337 ms_handle_reset on 
> IP2:6801/2590484227
> mds.mon2: mds_cache_memory_limit = '17179869184' (not observed, change may 
> require restart)
>
> Thanks,
> Hervé
>
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