1 files changed, 5 insertions, 1 deletions
diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py
index 67b8ca28c7..de244d7507 100644
--- a/synapse/handlers/sync.py
+++ b/synapse/handlers/sync.py
@@ -36,6 +36,8 @@ from synapse.visibility import filter_events_for_client
 
 logger = logging.getLogger(__name__)
 
+SYNC_RESPONSE_CACHE_MS = 2 * 60 * 1000
+
 # Store the cache that tracks which lazy-loaded members have been sent to a given
 # client for no more than 30 minutes.
 LAZY_LOADED_MEMBERS_CACHE_MAX_AGE = 30 * 60 * 1000
@@ -192,7 +194,9 @@ class SyncHandler(object):
         self.presence_handler = hs.get_presence_handler()
         self.event_sources = hs.get_event_sources()
         self.clock = hs.get_clock()
-        self.response_cache = ResponseCache(hs, "sync")
+        self.response_cache = ResponseCache(
+            hs, "sync", timeout_ms=SYNC_RESPONSE_CACHE_MS,
+        )
         self.state = hs.get_state_handler()
         self.auth = hs.get_auth()