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From "Winston Huang (JIRA)" <j...@apache.org>
Subject [jira] Created: (AMQ-1009) incorrect DequeueCount
Date Fri, 27 Oct 2006 03:49:02 GMT
incorrect DequeueCount
----------------------

                 Key: AMQ-1009
                 URL: https://issues.apache.org/activemq/browse/AMQ-1009
             Project: ActiveMQ
          Issue Type: Bug
          Components: Broker
    Affects Versions: 4.0.1
         Environment: linux
            Reporter: Winston Huang


i am seeing this through activemq (4.0.1) jmx:

Type = Queue
Destination = XXX
QueueSize = 2751
Name = XXX
DequeueCount = 3575
MemoryPercentageUsed = 0
ConsumerCount = 6
MemoryLimit = 9223372036854775807
EnqueueCount = 3575

and after a while, something like this:

Destination = XXX
QueueSize = 11421
Name = XXX
DequeueCount = 8046
MemoryPercentageUsed = 0
ConsumerCount = 6
MemoryLimit = 9223372036854775807
EnqueueCount = 13471

my activemq is started with a clean database and journal. how does the math add up among QueueSize,
DequeueCount and EnqueueCount? i thought dequeuecount + queuesize = enqueuecount. in my case,
QueueSize looks more "correct" than the dequeuecount is wrong because my consumers are slower
than message producers. 

more info, when i shutdown my consumers, i see stats like this during one test:

Type = Queue
Destination = XXX
QueueSize = 948
Name = XXX
DequeueCount = 4224
ConsumerCount = 0
EnqueueCount = 2722

why is DequeueCount greater than EnqueueCount? (the activemq instance was started from a clean
database and journal) 

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