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From "Mark Webb" <elihusma...@gmail.com>
Subject Re: Under IO Load
Date Tue, 12 Aug 2008 02:10:06 GMT
what is your hardware configuration?


On Mon, Aug 11, 2008 at 8:23 PM, sub3 <steve@subwest.com> wrote:

>
> 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.
> >>>
> >>>
> >>
> >>
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/Under-IO-Load-tp18933907p18936148.html
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
>

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