[rabbitmq-discuss] channel limits

Wed Nov 18 17:46:26 GMT 2009

On Wed, Nov 18, 2009 at 09:44:28AM -0800, JD Conley wrote:
> > The channel number is a short in the AMQP spec, which means 16
> > bits, so 65535 is the maximum channel. It's likely you'll need to tune
> > Erlang slightly for this given the default number of processes is
> > 32768.
> > A +P 134217727 arg to erl should get round this for you.
> 
> Is this a limitation per RabbitMQ cluster then? Just trying to get a feel
> for how I need to architect the cluster and application code...

No, that's a limit per node within the cluster.

> Does RabbitMQ re-use old channel numbers?

Yup.

> I have a channel pool that my
> basic.consume clients use. These pools are torn down whenever my client
> process restarts, which is often multiple times per day (whenever we push an
> update to the web farm).

Yes, that should be fine.

Matthew