diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py
index a30b0bc41..de08c78ed 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -443,6 +443,8 @@ class SQLBaseStore(object):
         if not event_ids:
             return []
 
+        logger.debug("_get_events_txn called with %d events", len(event_ids))
+
         if len(event_ids) > 50:
             events = []
             n = 50
@@ -451,6 +453,8 @@ class SQLBaseStore(object):
                 events.extend(self._get_events_txn(txn, e_ids))
             return events
 
+        logger.debug("_get_events_txn Fetching %d events", len(event_ids))
+
         where_clause = " OR ".join(["e.event_id = ?" for _ in event_ids])
 
         sql = (