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From sub3 <st...@subwest.com>
Subject Re: Under IO Load
Date Tue, 12 Aug 2008 00:23:52 GMT

Sorry, that last sentence sounds wrong, let me restate:
When I run several of those Test.java programs I attached, ActiveMQ stops. 
W/o these running ActiveMQ is fine.
So I don't know if it is a system resource issue, if so, what?
Or it is a condition that only arises when the system is bogged down with
i/o.

Any insight would be appreciated. Thanks.


sub3 wrote:
> 
> That is correct.  The processes that are performing the i/o on the disk
> are separate jvms.  It is not the same as the components using ActiveMQ. 
> They high i/o usage are somehow causing ActiveMQ to stop.  I've run many
> tests, with and without them running, ActiveMQ halts w/o any
> warnings/errors & it never recovers.
> 
> 
> elihusmails wrote:
>> 
>> So if I understand this right, you are sending messages to ActiveMQ while
>> performing I/O, and ActiveMQ is not performing any I/O (other than
>> caching
>> of data) since you are not persisting any data.
>> 
>> Is this true?
>> 
>> 
>> 
>> On Mon, Aug 11, 2008 at 5:08 PM, sub3 <steve@subwest.com> wrote:
>> 
>>>
>>> I have a system where 1 is sending to several (a & b) and occasionally b
>>> sends to c (all queues).  Very simple.  Persistence is set to false. 
>>> Queue
>>> sizes are capped at 50mb.
>>>
>>> If I put the system under a heavy i/o load (several programs
>>> reading/writing
>>> lots of files), ActiveMQ will stop.
>>>
>>> Am I hitting some system resource issue here, and if so, what is it? 
>>> Also,
>>> is there a way to get ActiveMQ to recover?
>>>
>>> I've attached my activemq.xml file, and a sample program to create i/o
>>> load
>>> (sometime I run several of these).  I am running on Windows Server 2003.
>>>
>>> Thanks.
>>> http://www.nabble.com/file/p18933907/activemq.xml activemq.xml
>>> http://www.nabble.com/file/p18933907/Test.java Test.java
>>> --
>>> View this message in context:
>>> http://www.nabble.com/Under-IO-Load-tp18933907p18933907.html
>>> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>>>
>>>
>> 
>> 
> 
> 

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