[rabbitmq-discuss] basic.qos prefetch across multiple queues - useful?

[Alan Antonuk]

The SimpleAmqpClient implicitly does basic.qos on a per-queue basis by only
allowing one consumer per channel.  This change would not have an effect on
the usage of this library.

-Alan


On Mon, Mar 18, 2013 at 11:30 AM, Matthias Radestock
<matthias at rabbitmq.com>wrote:

> Is anybody setting a basic.qos prefetch limit on channels with consumers
> on multiple queues?
>
> If so, are you relying on the fact that the prefetch limit applies
> *across* queues rather than *per* queue?
>
> That feature entails considerable implementation complexity and has a
> substantial performance impact on consuming from basic.qos-limited channels
> in general. And I've just found a bug in that area of the code, fixing of
> which will make the implementation even more complex and hurt performance
> even more.
>
> Hence I am trying to gauge people's opinion on whether we could make the
> prefetch limit apply per-queue instead.
>
> Regards,
>
> Matthias.
> ______________________________**_________________
> rabbitmq-discuss mailing list
> rabbitmq-discuss at lists.**rabbitmq.com<rabbitmq-discuss at lists.rabbitmq.com>
> https://lists.rabbitmq.com/**cgi-bin/mailman/listinfo/**rabbitmq-discuss<https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.rabbitmq.com/pipermail/rabbitmq-discuss/attachments/20130318/ce3c6722/attachment.htm>