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https://issues.apache.org/jira/browse/FLINK-34213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17809922#comment-17809922
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Gyula Fora commented on FLINK-34213:
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The problem here is that we are using aggregated metrics only currently. To
track diff you would need to query individual vertex metrics and track them
overhead which would be a huge overhead / cost for jobs with many vertices
> Consider using accumulated busy time instead of busyMsPerSecond
> ---------------------------------------------------------------
>
> Key: FLINK-34213
> URL: https://issues.apache.org/jira/browse/FLINK-34213
> Project: Flink
> Issue Type: Improvement
> Components: Autoscaler, Kubernetes Operator
> Reporter: Maximilian Michels
> Priority: Minor
>
> We might achieve much better accuracy if we used the accumulated busy time
> metrics from Flink, instead of the momentarily collected ones.
> We would use the diff between the last accumulated and the current
> accumulated busy time.
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