2 files changed, 2 insertions, 1 deletions
diff --git a/changelog.d/13096.misc b/changelog.d/13096.misc
new file mode 100644
index 0000000000..3bb51962e7
--- /dev/null
+++ b/changelog.d/13096.misc
@@ -0,0 +1 @@
+Reduce DB usage of `/sync` when a large number of unread messages have recently been sent in a room.
diff --git a/synapse/storage/databases/main/event_push_actions.py b/synapse/storage/databases/main/event_push_actions.py
index ae705889a5..10a7962382 100644
--- a/synapse/storage/databases/main/event_push_actions.py
+++ b/synapse/storage/databases/main/event_push_actions.py
@@ -148,7 +148,7 @@ class EventPushActionsWorkerStore(ReceiptsWorkerStore, EventsWorkerStore, SQLBas
         self._doing_notif_rotation = False
         if hs.config.worker.run_background_tasks:
             self._rotate_notif_loop = self._clock.looping_call(
-                self._rotate_notifs, 30 * 60 * 1000
+                self._rotate_notifs, 30 * 1000
             )
 
         self.db_pool.updates.register_background_index_update(