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From: Rob Davies <rajdavies@gmail.com>
Subject: Re: ApacheMQ broker memory consumption and crash
Date: Wed, 25 Jul 2007 22:21:27 +0100
To: users@activemq.apache.org

which version of amq ? The version really makes a difference to the  
answer ;)

On Jul 25, 2007, at 10:14 PM, razaimperial wrote:

>
> Hi guys,
>
> Like others, Im doing a stress test on MQ. I dont think I have a  
> config
> issue but just in case.
>
> I am simulating lots of topic from 14 connections (in a real  
> deployment each
> stream would be a seperate connection), each connection has around  
> X number
> of topic. There is just one consumer subscribed to all of these  
> topics. The
> message size is quite large though, about 25k per packet, sent  
> every 15
> seconds for each topic.
>
> The broker does fine until about 100 topics per connection in terms  
> of CPU
> utilization, but the memory footprint is quite large. The utilization
> progressively increases (starts at around 5% (of 4GB)) and  
> increases as more
> topics join the system. However it doesnt go past 15.5%  
> (translating to
> around 600mb) and after 15.5 percent first the CPU utlization goes  
> to 99%
> lingers there for a few seconds (the broker is sending messages at  
> this
> point) and the broker just dies.
>
> I've tried increasing the memory assigned to the broker but Im not  
> sure if
> Im doing it right. First off, there was the same behaviour by  
> default, even
> though the documentation says the default is 20mb RAM use, clearly  
> not the
> case. But even when I change that to 600mb or more, I get the exact  
> same
> behaviour.
>
> Im editing the default apachemq.xml file that ships with the  
> installation.
>
> Help much appreciated
> -- 
> View this message in context: http://www.nabble.com/ApacheMQ-broker- 
> memory-consumption-and-crash-tf4147994s2354.html#a11800104
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>