[rabbitmq-discuss] CPU usage on idle server

Simon MacMullen simon at rabbitmq.com
Tue Mar 11 08:59:15 GMT 2014

On 10/03/2014 23:53, Ryan Cross wrote:
> I have a 2.8.7 rabbitmq instance running on a backup server,
> processing no messages.  The bean.smp process consistently uses on
> average 5% CPU (ranging from 4-35%) according to top.  Is this
> expected for a service that is not processing any messages?


There have been bugs fixed since 2.8.7 that could describe what you're 
seeing - in particular if you have a lot of queues on the server, there 
was a bug fixed in 3.0.2 where queues would sometimes stay awake and 
emiting stats even when they had nothing to do.

If you have mgmt installed you should be able to see this because not 
all queues would be described as "idle".

Anyway, 2.8.7 is really quite old now, so an upgrade is likely to be 
worth it. There have been a lot of bugs fixed since then!

Cheers, Simon

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