[rabbitmq-discuss] Is there a channel publish throughput limit to a queue?

Matthias Radestock matthias at rabbitmq.com
Tue Oct 4 09:37:55 BST 2011

On 29/09/11 21:47, Allen Kim wrote:
> I checked the channel, and found out that the channel was still
> publishing to a queue.

Looks like the queues couldn't keep up with the inbound publishing rate, 
so rabbit ended up buffering messages in the channel.

> The speed of publishing was around 700/s to 800/s, which is definitely
> not 2000/s.

...which is another indication of the above.

> I was wondering if there is limit that affects publishing speed.

Well, obviously rabbit cannot process messages at an infinite rate, so 
clearly there has to be a limit ;)

However, 700Hz sounds quite low. On my desktop I can get more than 20 
times that. But there are many factors which can reduce that rate:
- persistent messages
- large messages
- routing messages to lots of queues
- using transactions
- having lots of consumers with basic.qos prefetch


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