Hi,
you can monitor the cache size and see if the new values are applied:
ceph@mds:~> ceph daemon mds.<MSD> cache status
{
"pool": {
"items": 106708834,
"bytes": 5828227058
}
}
You should also see in top (or similar tools) that the memory
increases/decreases. From my experience the new config value is
applied immediately.
Regards,
Eugen
Zitat von Hervé Ballans <herve.ballans@xxxxxxxxxxxxx>:
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 ?
$ 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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