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avoid 80s GIN inserts by tweaking work_mem
see https://github.com/matrix-org/synapse/issues/2753 for details
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@ -106,6 +106,7 @@ class SearchStore(BackgroundUpdateStore):
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event_search_rows.append((event_id, room_id, key, value))
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if isinstance(self.database_engine, PostgresEngine):
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txn.execute("SET work_mem='256KB'")
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sql = (
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"INSERT INTO event_search (event_id, room_id, key, vector)"
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" VALUES (?,?,?,to_tsvector('english', ?))"
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@ -123,6 +124,9 @@ class SearchStore(BackgroundUpdateStore):
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clump = event_search_rows[index:index + INSERT_CLUMP_SIZE]
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txn.executemany(sql, clump)
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if isinstance(self.database_engine, PostgresEngine):
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txn.execute("RESET work_mem")
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progress = {
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"target_min_stream_id_inclusive": target_min_stream_id,
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"max_stream_id_exclusive": min_stream_id,
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