[rabbitmq-discuss] Ready, Unacked and Total messages of Queues

[Juno Chan]

Hi MK,

I have set the per queue message TTL value to a small values for some
non-critical queues

I have read the below link
http://www.rabbitmq.com/blog/2012/05/11/some-queuing-theory-throughput-latency-and-bandwidth/

but I don't quite understand how prefetch helps, could you please explain
more on that? thanks.
If this really helps, how can it be set with .NET code? the tutorials only
shows python codes.

thanks very much for your help.
Cheers


On Tue, Apr 15, 2014 at 3:58 PM, Michael Klishin <mklishin at gopivotal.com>wrote:

>
>
> On 15 April 2014 at 11:56:25, Juno Chan (juno at algorithmictradinggroup.com)
> wrote:
> > > So it's good to hear that #ready msgs high is not impacting RabbitMQ
> > performance.
>
> Yes, it will, as soon as there are so many messages that RabbitMQ has to
> perform
> a lot of disk I/O.
>
> > because we encountered an issues like the total messages in rabbit
> > was up to 300K, while some applications have queues of extremely
> > high #ready, but no #unack, while some applications have queues
> > of high #unack, but no #ready.
>
> My point was that you should avoid overloaded queues and there are multiple
> features that help you with that even if you can’t have more consumer
> capacity
> that producer one.
> --
> MK
>
> Software Engineer, Pivotal/RabbitMQ
>



-- 
Juno Chan
Algorithmic Trading Group (ATG) Ltd
www.algorithmictradinggroup.com
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