[rabbitmq-discuss] Delay delivering messages

Wed Sep 8 10:46:47 BST 2010

Hi,

> Cool I'll try upgrading and see if that helps.

Any luck with 2.0.0?

Cheers,
Alex

On Mon, Sep 06, 2010 at 09:28:41AM +0100, Michael Burns wrote:
> >
> > When the slowdown occurs, does rabbit pick up speed a bit later?  Or do
> > you have to restart it or something else of the sort?
> >
> 
> Yes it will pick up speed after a bit without a server restart.
> 
> 
> >
> > When it occurs, does list_queues show a large number of messages?  If
> > so, you're probably not ack'ing the messages after consuming them.
> >
> 
> No. At the moment we're putting a very small number of messages through the
> system. When the delay occurs I'm usually seeing one or two messages on the
> queue. Eventually the messages will come through.
> Is there anything we could whilst the message is on the queue that would
> give more information as to why it is not being delivered?
> 
> 
> 
> 
> >
> > On an unrelated note, 2.0.0 is out, so you might want to upgrade.
> >
> 
> Cool I'll try upgrading and see if that helps.
> 
> Cheers,
> Michael
> 
> 
> >
> > Cheers,
> > Alex
> >
> > On Fri, Sep 03, 2010 at 11:38:09AM +0100, Michael Burns wrote:
> > > Hi Alex,
> > > I ran the multicast client and am getting speeds like:
> > >
> > > sending rate: 3550 msg/s, basic returns: 0 ret/s
> > > recving rate: 3461 msg/s, min/avg/max latency: 11931197/12253891/12477030
> > > microseconds
> > >
> > > If I let it run for a bit then sometimes both the sending and receiving
> > rate
> > > drop significantly e.g.:
> > >
> > > sending rate: 638 msg/s, basic returns: 0 ret/s
> > > recving rate: 628 msg/s, min/avg/max latency: 11788406/12363242/12735553
> > > microseconds
> > >
> > > Not sure if this drop is indicative of anything?
> > >
> > > We're using the java client 1.8.1, the broker is rabbitmq_server-1.8.1
> > >
> > > Thanks
> > > Michael
> > >
> > > On Fri, Sep 3, 2010 at 9:29 AM, Alexandru Scvorţov
> > > <alexandru at rabbitmq.com>wrote:
> > >
> > > > Hi Michael,
> > > >
> > > > > We are putting a very low volume of messages through and have
> > sometimes
> > > > had
> > > > > to wait up to 15 minutes for a single message to be delivered (at the
> > > > time
> > > > > this was the only message in the system).
> > > >
> > > > That sounds strage.  Are you up for a bit of debugging?
> > > >
> > > > Download the java client,
> > > >  http://www.rabbitmq.com/java-client.html
> > > >
> > > > Unpack it, and run
> > > >  sh runjava.sh com.rabbitmq.examples.MulticastMain -x 1 -y 1
> > > >
> > > > That command will run one of our example programmes in a way that
> > > > matches your setup: 1 producer (-x 1) and 1 consumer (-y 1).
> > > >
> > > > When I run it, I get speeds like:
> > > >  recving rate: 6052 msg/s, min/avg/max latency: 1063522/1118048/1164637
> > > > microseconds
> > > >  sending rate: 6419 msg/s, basic returns: 0 ret/s
> > > >
> > > > If you're getting similar speeds, there's probably something wrong with
> > > > the consumers/producers.  If not, it might be something to do with the
> > > > server.
> > > >
> > > > Could you please try it?
> > > >
> > > > Also, which version the broker and which client are you using?
> > > >
> > > > Cheers,
> > > > Alex
> > > >
> > > > On Fri, Sep 03, 2010 at 09:03:25AM +0100, Michael Burns wrote:
> > > > > Hi,
> > > > >
> > > > > We're just starting out with RabbitMQ and have a very simple setup:
> > one
> > > > > queue, one producer doing a basicPublish and one consumer doing a
> > > > > basicConsume using QueueingConsumer.
> > > > >
> > > > > For the most part it works fine however at fairly regular intervals
> > we
> > > > are
> > > > > finding that messages remain on the queue for a considerable period
> > > > before
> > > > > being delivered to the consumer.
> > > > >
> > > > > We are putting a very low volume of messages through and have
> > sometimes
> > > > had
> > > > > to wait up to 15 minutes for a single message to be delivered (at the
> > > > time
> > > > > this was the only message in the system).
> > > > >
> > > > > In all cases the messages are eventually delivered.
> > > > >
> > > > > I dont know where to start debugging this as there is nothing in the
> > > > > RabbitMQ logs thats suggests something is going wrong - could anyone
> > > > point
> > > > > me in the right direction as to what may be causing this?
> > > > >
> > > > > Many Thanks,
> > > > > Michael
> > > >
> > > > > _______________________________________________
> > > > > rabbitmq-discuss mailing list
> > > > > rabbitmq-discuss at lists.rabbitmq.com
> > > > > https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss
> > > >
> > > >
> >