From 234d07eb09946543546ce63463c3bfd40465e1d6 Mon Sep 17 00:00:00 2001
From: Mathieu Velten <mathieu.velten@beta.gouv.fr>
Date: Thu, 19 Dec 2024 14:02:06 +0000
Subject: [PATCH] Disable statement timeout during room purge (#18017)
This is already done for `purge_history` but seems to have been
forgotten for `purge_room`.
---
changelog.d/18017.misc | 1 +
synapse/storage/databases/main/purge_events.py | 5 +++++
2 files changed, 6 insertions(+)
create mode 100644 changelog.d/18017.misc
diff --git a/changelog.d/18017.misc b/changelog.d/18017.misc
new file mode 100644
index 0000000000..6b943a5bed
--- /dev/null
+++ b/changelog.d/18017.misc
@@ -0,0 +1 @@
+Disable DB statement timeout when doing a purge room since it can be quite long.
diff --git a/synapse/storage/databases/main/purge_events.py b/synapse/storage/databases/main/purge_events.py
index 08244153a3..c195685af8 100644
--- a/synapse/storage/databases/main/purge_events.py
+++ b/synapse/storage/databases/main/purge_events.py
@@ -376,6 +376,11 @@ class PurgeEventsStore(StateGroupWorkerStore, CacheInvalidationWorkerStore):
(room_id,),
)
+ 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")
+
# First, fetch all the state groups that should be deleted, before
# we delete that information.
txn.execute(
--
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