PendingReleaseNotes: note default enabling of `osd_memory_target_autotune`

Fixes: https://tracker.ceph.com/issues/51562
Signed-off-by: Melissa Li <melissali@redhat.com>
(cherry picked from commit 787f30a1b0dee7111f298831ed4b7d812bf9bcfc)

diff --git a/PendingReleaseNotes b/PendingReleaseNotes
index 12b47c132c4391b2d3016401f0e0c4c560622fa9..8a3ed3a8b0e047236482a5c425fdf9639695448d 100644 (file)
--- a/PendingReleaseNotes
+++ b/PendingReleaseNotes
@@ -57,6 +57,10 @@
   For more details, see:
 
   https://docs.ceph.com/en/latest/rados/operations/placement-groups/
+* Cephadm: ``osd_memory_target_autotune`` will be enabled by default which will set
+  ``mgr/cephadm/autotune_memory_target_ratio`` to ``0.7`` of total RAM. This will be
+  unsuitable for hyperconverged infrastructures. For hyperconverged Ceph, please refer
+  to the documentation or set ``mgr/cephadm/autotune_memory_target_ratio`` to ``0.2``.
 
 >=16.0.0
 --------