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Optimise the event_push_backfill_thread_id bg job (#14172)

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Co-authored-by: Erik Johnston <erik@matrix.org>
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David Robertson 2022-10-13 18:32:16 +01:00 committed by GitHub
parent 821f74a8c0
commit 16c5d95b59
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2 changed files with 9 additions and 2 deletions
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changelog.d/14172.bugfix Normal file
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@ -0,0 +1 @@
Fix poor performance of the `event_push_backfill_thread_id` background update, which was introduced in Synapse 1.68.0rc1.

10
synapse/storage/databases/main/event_push_actions.py
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@ -297,9 +297,15 @@ class EventPushActionsWorkerStore(ReceiptsWorkerStore, StreamWorkerStore, SQLBas
sql = f"""
UPDATE {table_name}
SET thread_id = 'main'
WHERE stream_ordering <= ? AND thread_id IS NULL
WHERE ? < stream_ordering AND stream_ordering <= ? AND thread_id IS NULL
"""
txn.execute(sql, (max_stream_ordering,))
txn.execute(
sql,
(
start_stream_ordering,
max_stream_ordering,
),
)
# Update progress.
processed_rows = txn.rowcount