[rabbitmq-discuss] 100% CPU usage and system crawls to a halt

[Ben Hood]

Mark,

On Fri, Oct 23, 2009 at 4:55 PM, Matthew Sackman <matthew at lshift.net> wrote:
> On Fri, Oct 23, 2009 at 10:17:23AM -0500, Mark Nutter wrote:
>> Quick question:  is there a limit to the amount of exchanges you want to
>> create on a particular node?  For instance, thousands, even hundreds of
>> thousands of exchanges?  Thanks,
>
> The exchange is simply a record in memory. It's not especially big, but
> it is a resource. Provided you don't run out of memory, there's no other
> limiting factor. Of course, if each exchange has several bindings to
> several queues and you end up with millions of queues then yes, you will
> find that much harder to achieve, it's not impossible though, provided
> you have juicy enough hardware.

FWIW there is article that briefly touches on this subject:
http://hopper.squarespace.com/blog/2008/11/7/measuring-scalability.html

Ben