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From jevans12 <jevan...@harris.com>
Subject Re: Stopping Statistics Gathering
Date Thu, 17 Aug 2006 17:14:49 GMT


James.Strachan wrote:
> 
> On 8/17/06, jevans12 <jevans12@harris.com> wrote:
>>
>> Is AMQ ALWAYS gathering statistics?
> 
> Yes
> 
>> Does the default of useJmx=false only
>> stop the mbean interfaces being exposed?
> 
> Yes.
> 
> 
>> Im running Spring + AMQ (embedded broker topo), we are using the Spring
>> MBeanExporter to expose our own mbeans. Since AMQ defaults to
>> useJmx=false,
> 
> It defaults to useJmx=true currently
> 
>>> Sorry this page told me different.
>  http://activemq.org/site/broker-configuration-uri.html
> http://activemq.org/site/broker-configuration-uri.html 
> 
> 
>> our Spring config is actually exposing the AMQ mbeans along with
>> up-to-date
>> stats.
> 
> How are you getting Spring to explose the MBeans automatically? e.g.
> ActiveMQ creates lots of mbeans dynamically such as for each
> conneciton, subscription, destination etc. How is Spring gonna expose
> those?
>>>>From the misunderstanding above I see now that AMQ sets useJmx=true
>>>I had the same question, Spring is looking for Java5 annontations to look
for interfaces to expose via JMX.
> 
>> I would like to turn off completly the AMQ stats gathering, is this
>> possible?
> 
> Just out of interest - why?
>>> Interesting enough in my server process i did a memory profile using
>>> JProbe. When our server starts up its in a quiescemt state. Im currently
>>> upgrading from an AMQ 4.0 snapshot to AMQ 4.0.1 and am noticing memory
>>> oscillating from 30M -> 50M. (need to make sure if this was happening
>>> before upgrade)
> I did a heap dump with instance data of at time t=30M and time t1=50M then
> compared snapshots.
> When i sorted high -> low on the diferences in memory the
> activemq.management.*Stats classes were on top. THis is all very
> preliminary. I need to do more analysys and report back later. ALthough in
> our production system if I can turn off stats gathering to squeek out a
> couple of extra cycles and bytes of memory Id like to have the option.
> 
> I don't think its possible currently. I'm sure it wouldn't be too hard
> to patch the code to avoid this...
> http://incubator.apache.org/activemq/contributing.html
> 
> -- 
> 
> James
> -------
> http://radio.weblogs.com/0112098/
> 
> 

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