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Faster room joins: fix race in recalculation of current room state (#13151)

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Bounce recalculation of current state to the correct event persister and
move recalculation of current state into the event persistence queue, to
avoid concurrent updates to a room's current state.

Also give recalculation of a room's current state a real stream
ordering.

Signed-off-by: Sean Quah <seanq@matrix.org>
This commit is contained in:
Sean Quah 2022-07-07 13:19:31 +01:00 • committed by GitHub
parent 2b5ab8e367
commit 1391a76cd2
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8 changed files with 214 additions and 55 deletions
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14
synapse/storage/databases/main/events.py
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@ -1007,16 +1007,16 @@ class PersistEventsStore:
self,
room_id: str,
state_delta: DeltaState,
stream_id: int,
) -> None:
"""Update the current state stored in the datatabase for the given room"""
await self.db_pool.runInteraction(
"update_current_state",
self._update_current_state_txn,
state_delta_by_room={room_id: state_delta},
stream_id=stream_id,
)
async with self._stream_id_gen.get_next() as stream_ordering:
await self.db_pool.runInteraction(
"update_current_state",
self._update_current_state_txn,
state_delta_by_room={room_id: state_delta},
stream_id=stream_ordering,
)
def _update_current_state_txn(
self,