diff --git a/changelog.d/14977.misc b/changelog.d/14977.misc new file mode 100644 index 000000000..4d551c52b --- /dev/null +++ b/changelog.d/14977.misc @@ -0,0 +1 @@ +Limit concurrent event creation for a room to avoid state resolution when sending bursts of events to a local room. \ No newline at end of file diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py index e688e0057..5f6da2943 100644 --- a/synapse/handlers/message.py +++ b/synapse/handlers/message.py @@ -499,9 +499,9 @@ class EventCreationHandler: self.request_ratelimiter = hs.get_request_ratelimiter() - # We arbitrarily limit concurrent event creation for a room to 5. - # This is to stop us from diverging history *too* much. - self.limiter = Linearizer(max_count=5, name="room_event_creation_limit") + # We limit concurrent event creation for a room to 1. This prevents state resolution + # from occurring when sending bursts of events to a local room + self.limiter = Linearizer(max_count=1, name="room_event_creation_limit") self._bulk_push_rule_evaluator = hs.get_bulk_push_rule_evaluator()