PendingReleaseNotes: add a note for `mds_session_metadata_threshold` mds config

Signed-off-by: Venky Shankar <vshankar@redhat.com>
(cherry picked from commit ac3ab1a203ad65c7db07bc2c02acb5620800fb25)

diff --git a/PendingReleaseNotes b/PendingReleaseNotes
index 5e2c22e1b51b3139c463e96761c37edafb463a58..120980c862c9a20bb64b10f9867bfe09fa2ae799 100644 (file)
--- a/PendingReleaseNotes
+++ b/PendingReleaseNotes
@@ -40,6 +40,11 @@
   "mgr/prometheus/server_port". This matches the output of the non pretty-print
   formatted version of the command.
 
+* CEPHFS: MDS evicts clients which are not advancing their request tids which causes
+  a large buildup of session metadata resulting in the MDS going read-only due to
+  the RADOS operation exceeding the size threshold. `mds_session_metadata_threshold`
+  config controls the maximum size that a (encoded) session metadata can grow.
+
 >= 16.2.14
 ----------