Add more granular event send metrics

synapse/storage/events.py

@@ -374,6 +374,18 @@ class EventsStore(SQLBaseStore):
                     new_forward_extremeties=new_forward_extremeties,
                 )
                 persist_event_counter.inc_by(len(chunk))
+                for event, context in chunk:
+                    if context.app_service:
+                        origin_type = "local"
+                        origin_entity = context.app_service.id
+                    elif self.hs.is_mine_id(event.sender):
+                        origin_type = "local"
+                        origin_entity = "*client*"
+                    else:
+                        origin_type = "remote"
+                        origin_entity = get_domain_from_id(event.sender)
+
+                    event_counter.inc(event.type, origin_type, origin_entity)
 
                 for event, context in chunk:
                     if context.app_service: