PendingReleaseNotes: add note about increased mon memory footprint

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit 2e66381c95fd39070a0746eadef03c8b35bbc798)

Conflicts:
	PendingReleaseNotes

diff --git a/PendingReleaseNotes b/PendingReleaseNotes
index e15de1d451a190881bf60ce734d786ea2679a33b..304e08c99800570cb012e33f393c3075d530e73c 100644 (file)
--- a/PendingReleaseNotes
+++ b/PendingReleaseNotes
@@ -36,6 +36,14 @@ notes (?))
 13.2.3
 ======
 
+* 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.
+
 * Ceph v13.2.2 includes a wrong backport, which may cause mds to go into
   'damaged' state when upgrading Ceph cluster from previous version.
   The bug is fixed in v13.2.3. For ceph v13.2.2 installation, upgrading