diff --git a/zont-exporter/zont_exporter.py b/zont-exporter/zont_exporter.py
index 93580d8..b615474 100644
--- a/zont-exporter/zont_exporter.py
+++ b/zont-exporter/zont_exporter.py
@@ -405,7 +405,9 @@ def collect_events(did):
             events = events[-EVENT_MAX:]
 
         _last_event_poll_time = now
-
+        
+        logging.debug(f"raw_events returned {len(events)} events for window [{mintime}, {now}]")
+        
         if not events:
             return