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Optimise backfill calculation (#12522)

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Try to avoid an OOM by checking fewer extremities.

Generally this is a big rewrite of _maybe_backfill, to try and fix some of the TODOs and other problems in it. It's best reviewed commit-by-commit.
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Richard van der Hoff 2022-04-26 10:27:11 +01:00 • committed by GitHub
parent e75c7e3b6d
commit 17d99f758a
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5 changed files with 168 additions and 106 deletions
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7
synapse/visibility.py
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@ -419,6 +419,13 @@ async def _event_to_memberships(
return {}
# for each event, get the event_ids of the membership state at those events.
#
# TODO: this means that we request the entire membership list. If there are only
# one or two users on this server, and the room is huge, this is very wasteful
# (it means more db work, and churns the *stateGroupMembersCache*).
# It might be that we could extend StateFilter to specify "give me keys matching
# *:<server_name>", to avoid this.
event_to_state_ids = await storage.state.get_state_ids_for_events(
frozenset(e.event_id for e in events),
state_filter=StateFilter.from_types(types=((EventTypes.Member, None),)),