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Date: Tue, 22 Jul 2008 10:47:00 -0700 (PDT)
From: "Hiram Chirino (JIRA)" <jira@apache.org>
To: dev@activemq.apache.org
Subject: [jira] Commented: (AMQ-1866) Using small queue prefetch sizes cause
 all consumers to run as fast as the slowest consumer.
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    [ https://issues.apache.org/activemq/browse/AMQ-1866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=44438#action_44438 ] 

Hiram Chirino commented on AMQ-1866:
------------------------------------

test case AMQ1866.java has been added to trunk.  Currently failing it show a test case the works for the default prefetch but which fails for small prefetches. 

> Using small queue prefetch sizes cause all consumers to run as fast as the slowest consumer.
> --------------------------------------------------------------------------------------------
>
>                 Key: AMQ-1866
>                 URL: https://issues.apache.org/activemq/browse/AMQ-1866
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.1.0
>            Reporter: Hiram Chirino
>            Assignee: Hiram Chirino
>
> If you have a JMS producer sending messages to multiple consumers and you have the cacheLevel set to 3 or higher, eventually all consumers will run as slow as the slowest consumer.
> In the attached projects the SA sends messages to a MockOptimizer (JMS consumer) that has two threads. One sleeps for one second and the other sleeps for ten. Initially the thread sleeping for 1 second will consume most of the messages, but towards the end it will start to consume messages every ten seconds as well.

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