[rabbitmq-discuss] Change flow control params

[Alvaro Videla]

The other day I was wondering the same and I randomly changed the defaults
to this: {20000, 50} and it hurt performance badly, at least for the very
simple test I was running of "push as many small messages as possible".

-Alvaro


On Mon, Sep 16, 2013 at 9:56 AM, Simon MacMullen <simon at rabbitmq.com> wrote:

> On 15/09/13 11:05, Bruce Dou wrote:
>
>> Any one changes -define(DEFAULT_CREDIT, {200, 50}). ?
>> It seems the throughput changes when I modify these 2 param.
>>
>
> Does it change for the better or the worse? What change did you make?
>
> When we developed the flow control feature we considered making this
> tunable, but there seemed to be a fairly broad plateau for the initial
> credit values with broadly similar performance, so we just picked values in
> the middle of that range and stuck with it. If you have a scenario where
> tuning this value does something useful I'd like to hear about it...
>
> Cheers, Simon
>
> --
> Simon MacMullen
> RabbitMQ, Pivotal
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