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Add membership column to current_state_events table.

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It turns out that doing a join is surprisingly expensive for the DB to
do when room_membership table is larger than the disk cache.
This commit is contained in:
Erik Johnston 2019-07-17 15:33:37 +01:00
parent c831c5b2bb
commit 6de09e07a6
5 changed files with 41 additions and 20 deletions
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8
synapse/storage/user_directory.py
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@ -618,15 +618,15 @@ class UserDirectoryStore(StateDeltasStore, BackgroundUpdateStore):
sql = """
SELECT room_id FROM (
SELECT c.room_id FROM current_state_events AS c
INNER JOIN room_memberships USING (event_id)
INNER JOIN room_memberships AS m USING (event_id)
WHERE type = 'm.room.member'
AND membership = 'join'
AND m.membership = 'join'
AND state_key = ?
) AS f1 INNER JOIN (
SELECT c.room_id FROM current_state_events AS c
INNER JOIN room_memberships USING (event_id)
INNER JOIN room_memberships AS m USING (event_id)
WHERE type = 'm.room.member'
AND membership = 'join'
AND m.membership = 'join'
AND state_key = ?
) f2 USING (room_id)
"""