change timing a bit

app/celery/tasks.py

@@ -78,13 +78,14 @@ def process_job(job_id, sender_id=None):
 
     # notify-api-1495 we are going to sleep periodically to give other
     # jobs running at the same time a chance to get some of their messages
-    # sent.  Sleep for 5 minutes after every 500 sends
+    # sent.  Sleep for 40 seconds after every 100 sends, which gives us throughput
+    # of about 9000 per hour and would keep the queue clear assuming only one sender.
     count = 0
     for row in recipient_csv.get_rows():
         process_row(row, template, job, service, sender_id=sender_id)
         count = count + 1
-        if count % 500 == 0:
-            sleep(5 * 60)
+        if count % 100 == 0:
+            sleep(40)
 
     # End point/Exit point for message send flow.
     job_complete(job, start=start)