[rabbitmq-discuss] High cpu usage for Java RabbitMQ client? (solved, my fault)

Wed Mar 25 06:40:47 GMT 2009

Robert,

Elsner, Robert wrote:
> I used the directions from http://www.rabbitmq.com/build-server.html 
> to download. If those are incorrect, then that needs to be fixed.

The instructions do indeed need fixing. We are aware of that, but just
haven't found the time to do it yet.

> If messages are marked immediate but the client's queue is over
> Basic.Qos setting, the server will silently drop the delivery?

Correct.

> Also, I have looked through the AMQP lists a little bit and saw some
>  discussion of a compressed or binary wire format, specifically
> relating to market quotes.  It looks like this is slated for 1.0, but
> that would be ideal for me (since AMQP overhead is ~30-50% of my
> message size now).  Is there a roadmap to adoption?

You are the first person to ask about this :) We have thought about more 
compact encodings for messaging than present in AMQP. See, for example 
Tony's "Streamlining HTTP" post 
(http://www.lshift.net/blog/2009/02/27/streamlining-http), but we have 
no concrete plans for implementation yet.

Does the overhead really cause problems in your setup? Do you end up 
saturating the network?

Regards,

Matthias.