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Fix get destinations to catch up query. (#9114)
t was doing a sequential scan on `destination_rooms`, which took minutes.
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changelog.d/9114.bugfix
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changelog.d/9114.bugfix
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Fix bug in federation catchup logic that caused outbound federation to be delayed for large servers after start up. Introduced in v1.21.0.
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@ -464,19 +464,17 @@ class TransactionStore(TransactionWorkerStore):
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txn: LoggingTransaction, now_time_ms: int, after_destination: Optional[str]
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) -> List[str]:
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q = """
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SELECT destination FROM destinations
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WHERE destination IN (
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SELECT destination FROM destination_rooms
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WHERE destination_rooms.stream_ordering >
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destinations.last_successful_stream_ordering
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)
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AND destination > ?
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AND (
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retry_last_ts IS NULL OR
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retry_last_ts + retry_interval < ?
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)
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ORDER BY destination
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LIMIT 25
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SELECT DISTINCT destination FROM destinations
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INNER JOIN destination_rooms USING (destination)
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WHERE
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stream_ordering > last_successful_stream_ordering
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AND destination > ?
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AND (
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retry_last_ts IS NULL OR
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retry_last_ts + retry_interval < ?
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)
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ORDER BY destination
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LIMIT 25
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"""
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txn.execute(
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q,
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