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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPID-6764) Message age alerting is inappropriate on the enqueue path
Date Mon, 22 Feb 2016 00:00:23 GMT

    [ https://issues.apache.org/jira/browse/QPID-6764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15156303#comment-15156303

ASF subversion and git services commented on QPID-6764:

Commit 1731576 from [~godfrer] in branch 'java/trunk'
[ https://svn.apache.org/r1731576 ]

QPID-6764 : Only perform relevant notification checks on new message arrival

> Message age alerting is inappropriate on the enqueue path
> ---------------------------------------------------------
>                 Key: QPID-6764
>                 URL: https://issues.apache.org/jira/browse/QPID-6764
>             Project: Qpid
>          Issue Type: Improvement
>          Components: Java Broker
>            Reporter: Keith Wall
>             Fix For: qpid-java-6.1
> The Java Broker supports number of configurable message/queue alerts such as message
size alert (overly large messages), queue depth alert (queues with an unexpected number of
message on them), or message age alert (a queue containing a message which is older than a
threshold).  These checks are performed in two places: periodically by housekeeping and when
a message is enqueued.
> The message age alert check is performed on by housekeeping and on enqueue of a new message.
 The latter check is inappropriate and is a waste of resources.  Unlike the other checks,
enqueuing a message can't affect the outcome.  It should be performed only be housekeeping.
> The message age check involves taking a lock on the oldest message - so may have a significant
computation overhead.

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