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Message-ID: <ec6e67fd0606050059t178275f7sc6e1a8501adf9376@mail.gmail.com>
Date: Mon, 5 Jun 2006 08:59:53 +0100
From: "James Strachan" <james.strachan@gmail.com>
To: activemq-users@geronimo.apache.org
Subject: Re: Slow consumer problem
In-Reply-To: <4709829.post@talk.nabble.com>
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References: <4709829.post@talk.nabble.com>

BTW are you positive you are using persistent queues? i.e. setting hte
delivery mode on your MessageProducer to be persistent?

On 6/5/06, Frank Baxter <frank@baxres.org> wrote:
>
> I've read through the slow consumer issues, but I still can't figure out how
> to solve this problem.
>
> I'm using AMQ 4.0 with persistent queues.  I've got several message
> producers that are reading information from an external system and creating
> JMS messages.  They do this in bursts, sometimes with a high input rate.
> The messages end up around 300K in size.  I use auto-ack on these producers.
>
> My consumers are slow, and sometimes are not even running.  I'm expecting
> the JMS system to queue the messages up in the persistent storage.  When my
> consumers are running they will pull messages off as they can.  I use
> client-ack on the consumers (they are actually a chain of consumer/producers
> with decision points).
>
> It seems that the default behavior for AMQ is to slow down my producers when
> the messages queue up.  Eventually (seems to be around 2500 messages) they
> stop completely.  This causes a problem with my initial producers because
> they are also receiving inputs from the external (non JMS) system.  With AMQ
> they are failing because they are timing out talking to that other system.
>
> What I'm looking for is a way to remove that auto-slow down logic in my
> producers.  I want these producers to write messages as fast as possible so
> I don't impact my external system.  Does anyone have any ideas on how I can
> achieve this with AMQ?
>
> BTW, I have this system implemented and working using JBoss MQ, but I'm
> looking to replace it due to performance issues, especially when large
> queues exist and the JBoss server restarts.
>
> --
> View this message in context: http://www.nabble.com/Slow-consumer-problem-t1733329.html#a4709829
> Sent from the ActiveMQ - User forum at Nabble.com.
>
>


-- 

James
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http://radio.weblogs.com/0112098/