diff --git a/reports/error_details.py b/reports/error_details.py
index a45bfd5..c3b7b8e 100644
--- a/reports/error_details.py
+++ b/reports/error_details.py
@@ -160,16 +160,24 @@ if __name__ == '__main__':
     expiry = 60 * 60  # 1 hour
     cmds = ['create', 'rebuild', 'rescue', 'resize', 'snapshot']
 
+    requests = models.RawData.objects.filter(when__gt=dstart, when__lte=dend)\
+                                     .exclude(instance=None)\
+                                     .values('request_id', 'instance')\
+                                     .distinct()
+    inst_recs = {}
+    for request in requests:
+        uuid = request['instance']
+        request_id = request['request_id']
+        if uuid in inst_recs:
+            inst_recs[uuid].append(request_id)
+        else:
+            inst_recs[uuid] = [request_id]
+
     for uuid_dict in updates:
         uuid = uuid_dict['instance']
 
-        # All the unique Request ID's for this instance during that timespan.
-        reqs = models.RawData.objects.filter(instance=uuid,
-                                             when__gt=dstart, when__lte=dend)\
-                                     .values('request_id').distinct()
-
         req_list = []
-        for req_dict in reqs:
+        for req_dict in inst_recs.get(uuid, []):
             req = req_dict['request_id']
 
             raws = list(models.RawData.objects.filter(request_id=req)