From 90e1df262d6d1a8f55595345c73aa5352109dff5 Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Wed, 26 Jun 2024 13:14:48 +0100 Subject: [PATCH] Handle SQLite --- synapse/storage/databases/main/event_federation.py | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/synapse/storage/databases/main/event_federation.py b/synapse/storage/databases/main/event_federation.py index c3bdfe1e5a..9b3ced9edb 100644 --- a/synapse/storage/databases/main/event_federation.py +++ b/synapse/storage/databases/main/event_federation.py @@ -406,8 +406,11 @@ class EventFederationWorkerStore(SignatureWorkerStore, EventsWorkerStore, SQLBas # also returning large quantities of redundant data (which can make it a # lot slower). - txn.execute("SET LOCAL jit = off") - txn.execute("SET LOCAL enable_seqscan = off") + if isinstance(txn.database_engine, PostgresEngine): + # JIT and sequential scans sometimes get hit on this code path, which + # can make the queries much more expensive + txn.execute("SET LOCAL jit = off") + txn.execute("SET LOCAL enable_seqscan = off") sql = """ WITH RECURSIVE links(chain_id) AS (