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From "Marnie McCormack (JIRA)" <qpid-...@incubator.apache.org>
Subject [jira] Updated: (QPID-54) When the broker is receiving high load client received rate falls.
Date Tue, 31 Oct 2006 14:44:17 GMT
     [ http://issues.apache.org/jira/browse/QPID-54?page=all ]

Marnie McCormack updated QPID-54:

    Fix Version/s: M2
                       (was: M1)

> When the broker is receiving high load client received rate falls.
> ------------------------------------------------------------------
>                 Key: QPID-54
>                 URL: http://issues.apache.org/jira/browse/QPID-54
>             Project: Qpid
>          Issue Type: Bug
>          Components: Java Broker, Java Client
>            Reporter: Martin Ritchie
>             Fix For: M2
> From work on QPID-48.
> When running the IBM Sender / Receiver tests at high data rates the OS cannot keep up
with the high message rate. The messages are buffered by MINA, I haven't been able to cause
MINA to result in an out of memory exception but that is the logical outcome if the data rate
was high enough(see DIRMINA-144, DIRMINA-262).  When the sender disconnects the broker receives
a high volume of messages as the Sender's MINA buffer empties.
> As these messages arrive and are processed by the DeliveryManager the data rate's received
on the Receiver drop by as much as 50%. When then Sender has finally sent all messages the
Receiver's data rate increases usually to a new higher level. As would be expected as it is
simply draining a single queue.

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