[jira] [Created] (FLINK-20852) Enrich back pressure stats per subtask in the WebUI

[Shang Yuanchun (Jira)]

Piotr Nowojski created FLINK-20852:
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             Summary: Enrich back pressure stats per subtask in the WebUI
                 Key: FLINK-20852
                 URL: https://issues.apache.org/jira/browse/FLINK-20852
             Project: Flink
          Issue Type: Sub-task
          Components: Runtime / Web Frontend
    Affects Versions: 1.12.0
            Reporter: Piotr Nowojski
             Fix For: 1.13.0


We can enrich the back pressure tab in the WebUI with a couple of more metrics that can help us diagnose the problem, like:
* backPressuredTimeMsPerSecond
* busyTimeMsPerSecond
* idleTimeMsPerSecond
* inPoolUsage
* outPoolUsage



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