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Note why we're limiting concurrent event sends

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Erik Johnston 2018-04-10 14:00:24 +01:00
parent e5082494eb
commit f8e8ec013b
1 changed files with 5 additions and 0 deletions
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synapse/handlers/message.py
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@ -557,6 +557,11 @@ class EventCreationHandler(object):
See self.create_event and self.send_nonmember_event. See self.create_event and self.send_nonmember_event.
""" """
# We limit the number of concurrent event sends in a room so that we
# don't fork the DAG too much. If we don't limit then we can end up in
# a situation where event persistence can't keep up, causing
# extremities to pile up, which in turn leads to state resolution
# taking longer.
with (yield self.limiter.queue(event_dict["room_id"])): with (yield self.limiter.queue(event_dict["room_id"])):
event, context = yield self.create_event( event, context = yield self.create_event(
requester, requester,