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https://issues.apache.org/jira/browse/FLINK-15438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17005760#comment-17005760
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Jörn Kottmann commented on FLINK-15438:
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I would like to propose to change DCounter to always return the delta in the
counter since the last call. To be able to compute it an instance variable with
the last count has to be added to DCounter.
> Counter metrics are incorrectly reported as total counts to DataDog
> -------------------------------------------------------------------
>
> Key: FLINK-15438
> URL: https://issues.apache.org/jira/browse/FLINK-15438
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Metrics
> Affects Versions: 1.9.1
> Reporter: Jörn Kottmann
> Priority: Minor
>
> The Flink semantics of a counter are not matching with the counters in
> DataDog.
> In Flink a counter counts the total of increment and decrement calls.
> In DataDog a counter is a rate over the reporting interval.
> The Flink implementation of the DataDog reporter seems to send the Flink
> counter value each time the metrics are reported. Correct would be to send
> the delta of the counter since the last report.
> There are some features in DataDog which are easier to use if this could be
> fixed, e.g. alerts based on counters.
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