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Temporarily disable sequential scans for state fetching

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This commit is contained in:
Erik Johnston 2016-09-08 09:38:54 +01:00
parent 3c320c006c
commit b568ca309c
1 changed files with 4 additions and 0 deletions
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synapse/storage/state.py
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@ -310,6 +310,10 @@ class StateStore(SQLBaseStore):
results = {group: {} for group in groups}
if isinstance(self.database_engine, PostgresEngine):
# Temporarily disable sequential scans in this transaction. This is
# a temporary hack until we can add the right indices in
txn.execute("SET LOCAL enable_seqscan=off")
# The below query walks the state_group tree so that the "state"
# table includes all state_groups in the tree. It then joins
# against `state_groups_state` to fetch the latest state.