Add experimental option to reduce extremities.

Adds new config option `cleanup_extremities_with_dummy_events` which
periodically sends dummy events to rooms with more than 10 extremities.

THIS IS REALLY EXPERIMENTAL.

1 files changed, 6 insertions, 0 deletions

diff --git a/synapse/config/server.py b/synapse/config/server.py
index 7d56e2d141..6e5b46e6c3 100644
--- a/synapse/config/server.py
+++ b/synapse/config/server.py
@@ -317,6 +317,12 @@ class ServerConfig(Config):
 
         _check_resource_config(self.listeners)
 
+        # An experimental option to try and periodically clean up extremities
+        # by sending dummy events.
+        self.cleanup_extremities_with_dummy_events = config.get(
+            "cleanup_extremities_with_dummy_events", False,
+        )
+
     def has_tls_listener(self):
         return any(l["tls"] for l in self.listeners)