From 55e4d27b36fd69a3cf3eceecbd42706579ef2dc7 Mon Sep 17 00:00:00 2001 From: Shay Date: Wed, 8 Feb 2023 11:25:11 -0800 Subject: [PATCH] Limit concurrent event creation for a room to avoid state resolution when sending bursts of events to a local room (#14977) --- changelog.d/14977.misc | 1 + synapse/handlers/message.py | 6 +++--- 2 files changed, 4 insertions(+), 3 deletions(-) create mode 100644 changelog.d/14977.misc diff --git a/changelog.d/14977.misc b/changelog.d/14977.misc new file mode 100644 index 0000000000..4d551c52b7 --- /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 e688e00575..5f6da2943f 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()