diff --git a/oslo_templates/files/queens/oslo/messaging/_rabbit.conf b/oslo_templates/files/queens/oslo/messaging/_rabbit.conf
index c20e233..cc7aa9d 100644
--- a/oslo_templates/files/queens/oslo/messaging/_rabbit.conf
+++ b/oslo_templates/files/queens/oslo/messaging/_rabbit.conf
@@ -150,7 +150,14 @@
 
 # Specifies the number of messages to prefetch. Setting to zero allows
 # unlimited messages. (integer value)
-#rabbit_qos_prefetch_count = 64
+
+# NOTE(dmescheryakov) hardcoding to >0 by default
+# Having no prefetch limit makes oslo.messaging consume all available
+# messages from the queue. That can lead to a situation when several
+# server processes hog all the messages leaving others out of business.
+# That leads to artificial high message processing latency and at the
+# extrime to MessagingTimeout errors.
+rabbit_qos_prefetch_count = 64
 
 # Number of seconds after which the Rabbit broker is considered down
 # if heartbeat's keep-alive fails (0 disable the heartbeat).