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From naga007 <>
Subject Re: ActiveMQ Slowdown
Date Mon, 09 Jul 2007 13:37:55 GMT

which version of activemq are u using and Can u post ur activemq.xml file?.

Anthrope wrote:
> Hello,
>      Our application is essentially a pipeline of processing engines that
> communicate via JMS queues, and so far, ActiveMQ has been the JMS
> implementation of our choice.  In our application, engines produce data
> and dumping it onto a queue, and a number of engines read that data,
> process it and dump them onto another queue that is in turn read from by
> other engines downstream, and so on. We normally have one ActiveMQ
> instance serving one queue, but that is configurable. The messages range
> in size from 300k to 1M at the most.
> Over the course of time, we've faced  different issues vis-a-vis
> performance or stability but the problems have eventually been solved.
> Now, we're close to going into production and are facing a serious hurdle
> that threatens to delay our rollout.
> The problem is this: over time, we notice that the average time it takes
> to read from or write to a queue gradually increases until things become
> so sluggish that we need to restart ActiveMQ. Our processing engines do
> not need to be restarted because we're using the failover URL, and they
> automatically reconnect. Once we restart ActiveMQ, things run fine for a
> while before the sluggishness sets in. I have noticed no leaks in our own
> application code, and ActiveMQ itself seems to be fine from a memory usage
> standpoint.
> Our configuration is as follows:
> - ActiveMQ 4.1.1
> - Linux  2.6.9-34.ELsmp
> - Java 1.5.0_09
> - Were using queues with transacted sessions
> - We're using MySQL as the persistent store (Please not that we see this
> problem arise with ALL store implementations, including our own homegrown
> BDB store, which is why I am convinced it is not the store itself)
> Does anyone have an idea as to where I might look, to solve this problem?
> Thanks,
> Prashanth

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