Merge pull request #64106 from zdover23/wip-doc-2025-06-23-tr71792-radosgw-notifications

doc/radosgw: add "persistent_topic_size"

Reviewed-by: Yuval Lifshitz <ylifshit@ibm.com>

diff --cc doc/radosgw/notifications.rst
index 77e4eb525ff6cc8072ea7eef774200f9be13829c,1875dbf85b493cdcd13911d5276f2aa978579098..c12aa46ec3f736646774b36c718a0db86257b4e9
--- 1/doc/radosgw/notifications.rst
--- 2/doc/radosgw/notifications.rst
+++ b/doc/radosgw/notifications.rst
@@@ -125,7 -125,9 +125,8 @@@ Dump (in JSON format) all pending bucke
  Notification Performance Statistics
  -----------------------------------
  
+ - ``persistent_topic_size``: queue size in bytes. 
  - ``pubsub_event_triggered``: a running counter of events that have at least one topic associated with them
 -- ``pubsub_event_lost``: a running counter of events that had topics associated with them, but that were not pushed to any of the endpoints
  - ``pubsub_push_ok``: a running counter, for all notifications, of events successfully pushed to their endpoints
  - ``pubsub_push_fail``: a running counter, for all notifications, of events that failed to be pushed to their endpoints
  - ``pubsub_push_pending``: the gauge value of events pushed to an endpoint but