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https://issues.apache.org/jira/browse/ARTEMIS-1663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16355384#comment-16355384
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ASF GitHub Bot commented on ARTEMIS-1663:
-----------------------------------------
Github user cshannon commented on the issue:
https://github.com/apache/activemq-artemis/pull/1853
@clebertsuconic - I don't think we need to re-calculate anything if the
values are missing for paging. The point of this metric isn't to give the
user information on storage consumption as that data already exists. They can
find out how many page files are being used and disk usage already, etc.
The point of these metrics is to know exactly how much data on a queue is
left to consume. So there might be a 5 megabyte page file but only 2 messages
left to consume and the rest of the file is just waiting to be GC'd. This
metric only includes the 2 messages to be consumed and not the rest of the file.
> Add enhanced message count and size metrics for Queues
> ------------------------------------------------------
>
> Key: ARTEMIS-1663
> URL: https://issues.apache.org/jira/browse/ARTEMIS-1663
> Project: ActiveMQ Artemis
> Issue Type: New Feature
> Components: Broker
> Affects Versions: 2.4.0
> Reporter: Christopher L. Shannon
> Assignee: Christopher L. Shannon
> Priority: Major
>
> The purpose of this Jira is to enhance the message count metrics and to add
> size metrics for Queues. By size metrics I mean the encoded size of all the
> messages (for large messages this will include body as well). Right now we
> track memory usage but it is also very useful to know exactly how much data
> is pending on a Queue to be consumed.
> The scope of this will be support for tracking the count/size of pending
> messages, count/size of delivering messages, and count/size of scheduled
> messages. For each of these categories durable size metrics will be tracked
> as well. The paging store will also support tracking of size metrics as well.
> These new metrics will be exposed through JMX to allow users to view the
> statistics. Also by tracking these new values it will allow for enhanced
> features in the future (ie new flow control options)
>
>
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