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Diffstat (limited to 'synapse/storage')
| -rw-r--r-- | synapse/storage/databases/main/events_bg_updates.py | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/synapse/storage/databases/main/events_bg_updates.py b/synapse/storage/databases/main/events_bg_updates.py index 1c95c66648..29f33bac55 100644 --- a/synapse/storage/databases/main/events_bg_updates.py +++ b/synapse/storage/databases/main/events_bg_updates.py @@ -1146,6 +1146,16 @@ class EventsBackgroundUpdatesStore(SQLBaseStore): logger.info("completing stream_ordering migration: %s", sql) txn.execute(sql) + # ANALYZE the new column to build stats on it, to encourage PostgreSQL to use the + # indexes on it. + # We need to pass execute a dummy function to handle the txn's result otherwise + # it tries to call fetchall() on it and fails because there's no result to fetch. + await self.db_pool.execute( + "background_analyze_new_stream_ordering_column", + lambda txn: None, + "ANALYZE events(stream_ordering2)", + ) + await self.db_pool.runInteraction( "_background_replace_stream_ordering_column", process ) |