[rabbitmq-discuss] Why consumer become slow if publish faster?

[椰风]

I've made a matrix about publish and consum cases.


publish               consum                 backlog message
<=2000/s           2000/s                       No
<=4000/s           1200/s                       1,500,000(approximately)
=0/s(finished)      4000/s                       0(take about 10 minutes)


Why the speed of the consumer reduced to 1200/s when speed of the publish grown to 4000/s?
In my opinion , the consumer speed shoud not affected by publish or should not reduced in the whole period.


The consumer set the no_ack to true.


The diagram of the monitor is in attachment.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.rabbitmq.com/pipermail/rabbitmq-discuss/attachments/20140207/fca3bd6e/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 968E17D3 at AF154557.F5D9F452.jpg
Type: image/jpeg
Size: 132055 bytes
Desc: not available
URL: <http://lists.rabbitmq.com/pipermail/rabbitmq-discuss/attachments/20140207/fca3bd6e/attachment.jpg>