1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/replication/tcp/streams.py b/synapse/replication/tcp/streams.py

index c1e626be3f..728746bd12 100644
--- a/synapse/replication/tcp/streams.py
+++ b/synapse/replication/tcp/streams.py
@@ -32,7 +32,7 @@ from twisted.internet import defer
 logger = logging.getLogger(__name__)
 
 
-MAX_EVENTS_BEHIND = 10000
+MAX_EVENTS_BEHIND = 500000
 
 
 EventStreamRow = namedtuple("EventStreamRow", (