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Disable statement timeout whilst purging rooms #16455

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Oct 9, 2023
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Disable statement timeout whilst purging rooms #16455

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1e7ad8f
Disable statement timeout whilst purging rooms
reivilibre Oct 9, 2023
be29f1f
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reivilibre Oct 9, 2023
2264053
Note the introduction version
reivilibre Oct 9, 2023
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1 change: 1 addition & 0 deletions changelog.d/16455.bugfix
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Prevent the purging of large rooms from timing out when Postgres is in use. The timeout which causes this issue was introduced in Synapse 1.88.0.
5 changes: 5 additions & 0 deletions synapse/storage/databases/main/purge_events.py
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Expand Up @@ -89,6 +89,11 @@ def _purge_history_txn(
# furthermore, we might already have the table from a previous (failed)
# purge attempt, so let's drop the table first.

if isinstance(self.database_engine, PostgresEngine):
# Disable statement timeouts for this transaction; purging rooms can
# take a while!
txn.execute("SET LOCAL statement_timeout = 0")

txn.execute("DROP TABLE IF EXISTS events_to_purge")

txn.execute(
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