[jira] [Commented] (FLINK-20717) Create backPressuredTimeMsPerSecond metric

["Piotr Nowojski (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-20717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17258309#comment-17258309 ] 

Piotr Nowojski commented on FLINK-20717:
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After some discussion offline, since we are introducing this metric, we decided to modify the pre-existing `idleTimeMsPerSecond` metric, to exclude the back pressured time out of it. 

Previously `idleTimeMsPerSecond` was defined as the time task spent waiting for either the input or the back-pressure. Now idleTimeMsPerSecond` excludes back pressured time, so if the task is back pressured it is not idle.

> Create backPressuredTimeMsPerSecond metric
> ------------------------------------------
>
>                 Key: FLINK-20717
>                 URL: https://issues.apache.org/jira/browse/FLINK-20717
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Runtime / Metrics, Runtime / Task
>            Reporter: Piotr Nowojski
>            Assignee: Piotr Nowojski
>            Priority: Major
>             Fix For: 1.13.0
>
>
> Create {{backPressuredTimeMsPerSecond}} metric, measured similarly to the existing {{idleTimeMsPerSecond}}.



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