[rabbitmq-discuss] RabbitMQ QUEUE MESSAGES

[Matthias Radestock]

On 24/07/13 08:51, rabbit15 wrote:
> Sorry, I don't have. If you need I will test it one more time. It was the
> same so I skip it.

Please post another pair of reports and associated graph. Sorry about that.

Also, I have just noticed something odd about the previous graph you 
posted 
(http://rabbitmq.1065348.n5.nabble.com/RabbitMQ-QUEUE-MESSAGES-tp27737p28293.html): 
the publish rate is displayed as 53.5kHz but the graph only shows around 
~20kHz. So there is definitely something odd going on here.

I've also notices something else: the graph you previously posted 
indicated an increasing number of unacknowledged messages. And the 
recent reports show that too. The complexity of delivering messages to 
consumers and of processing an acknowledgement is 
O(log(number_of_unacknowledged_messages)). Since in your test the number 
of unacknowledged messages rises over time, there will be a slow-down. 
That doesn't explain the inflection in the graph though.

Matthias.