Thanks, Greg. This is as I suspected. Ceph is full of subtleties and I wanted to be sure.
-- aad > > The osd_map_cache_size controls the OSD’s cache of maps; the change in 13.2.3 > is to the default for the monitors’. > On Mon, Jan 7, 2019 at 8:24 AM Anthony D'Atri <[email protected] > <mailto:[email protected]>> wrote: > > > > * The default memory utilization for the mons has been increased > > somewhat. Rocksdb now uses 512 MB of RAM by default, which should > > be sufficient for small to medium-sized clusters; large clusters > > should tune this up. Also, the `mon_osd_cache_size` has been > > increase from 10 OSDMaps to 500, which will translate to an > > additional 500 MB to 1 GB of RAM for large clusters, and much less > > for small clusters. > > > Just I don't perseverate on this: mon_osd_cache_size is a [mon] setting for > ceph-mon only? Does it relate to osd_map_cache_size? ISTR that in the past > the latter defaulted to 500; I had seen a presentation (I think from Dan) at > an OpenStack Summit advising its decrease and it defaults to 50 now. > > I like to be very clear about where additional memory is needed, especially > for dense systems. > > -- Anthony > > _______________________________________________ > ceph-users mailing list > [email protected] <mailto:[email protected]> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > <http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com>
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