[rabbitmq-discuss] MQ consumer become very slow if there are a lot of ready message

椰风 1006798382 at qq.com
Mon Dec 30 16:44:33 GMT 2013

I have 1 node with 8 cores cpu(Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz) and 16G RAMOS: centos 6.3 64bits
Rabbit MQ version: rabbitmq-server-3.2.2-1.noarch

exchange: ex-statcen, direct type
queue :4 queues, use the same direct routine key to get 4 copies from the ex-statcen

It worked ok at start, the speed to ex-statcen exchange is 7k/sec, and the consumer is very quickly.
After a while, the queue consumer become slow, about 2,000,000 messages stayed in queue.
Then I stop the consumer and restart a new consumer, the speed of consumption was still very slow, about 10~700/sec.

My question is why the speed of consumption can not back to the 7k/sec? How to improve the speed.

Note that I've enabled the HiPE. with erlang R16B03 version

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