JMS Queue slows down after time

Question

          Hi,
          Our system makes use of queues extensively. We, pumps trhough tens of thousands
          of messages every day . Every few days, our Weblogic 7 SP5 JMS queue slows down
          with very little activity. After restarting the instance, everything goes back
          to normal. We have about 14 queues in our system with a very high rate of throughput.
          Any ideas as to what slows down the queue requiring a restart.
          The JMS file store is excluded from anti-virus and backup software.
          Kevin
          

Answer 1

          Hi Tom, The memory usage is fine. 1Gb is available to the JVM and the memory usage
          is usually about 1/4th of that when we experience the issues below
          Tom Barnes <[email protected].bea.com>
          wrote:
          >Another thing to look at is server CPU usage before and
          >during the slowdown.
          >
          >Also memory usage. There may be a memory leak
          >somewhere that expands JVM memory to the point
          >where the operating system begins to page...
          >
          >Kevin Sharfman wrote:
          >
          >> Hi Tom, We are able to measure a slowdown by the time it takes to post
          >messages
          >> to a queueas well as the time for a message to be delievered off the
          >queue. Our
          >> throughput just drops dramatically. During this time, the number of
          >messages in
          >> the queues are quite low, due to the slow duration of posting a message.
          >I will
          >> try and obtain thread drumps. However, the are no error messages nor
          >logs that
          >> point to any problem. Restarting the instance, immediatly solves the
          >performance
          >> problem. This problem occurs intermittedly - sometimes once a week
          >or once every
          >> 2 weeks or even twice a week.
          >>
          >>
          >> Tom Barnes <pleasereplyinnewsgroup.weblogic.developer.interest.jms@newsgrou
          >>
          >> ps.bea.com> wrote:
          >>
          >>>Hi Kevin,
          >>>
          >>>Is the number of messages in the destination higher at
          >>>these times?
          >>>
          >>>If there is "very little activity" how can you
          >>>measure a slowdown?
          >>>
          >>>Can you force server side thread-dumps the next
          >>>time this occurs?
          >>>
          >>>Tom
          >>>
          >>>Kevin Sharfman wrote:
          >>>
          >>>
          >>>>Hi,
          >>>>
          >>>>Our system makes use of queues extensively. We, pumps trhough tens
          >>>
          >>>of thousands
          >>>
          >>>>of messages every day . Every few days, our Weblogic 7 SP5 JMS queue
          >>>
          >>>slows down
          >>>
          >>>>with very little activity. After restarting the instance, everything
          >>>
          >>>goes back
          >>>
          >>>>to normal. We have about 14 queues in our system with a very high
          >rate
          >>>
          >>>of throughput.
          >>>
          >>>>Any ideas as to what slows down the queue requiring a restart.
          >>>>
          >>>>The JMS file store is excluded from anti-virus and backup software.
          >>>>
          >>>>Kevin
          >>>
          >>
          >