Thanks. In the meantime we were able to narrow down the cause of the RAM consumption a little. ceph mds cache status shows, that the cache is within the limit (32G): { "pool": { "items": 758820483, "bytes": 32642572344 } } The remaining memory belongs to buffer_anon: ceph daemon mds.fdi-cephfs.ceph-service-10.lajqwl dump_mempools buffer_anon": { "items": 3841090, "bytes": 12331436210 Any idea what is that related to? Maybe the StrayManager. I can not find any information about buffer_anon. Regards Henning _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx