[GitHub] spark pull request #22167: [SPARK-25170][DOC] Add list and short description...

[kiszk <gi...@git.apache.org>]

Github user kiszk commented on a diff in the pull request:

    https://github.com/apache/spark/pull/22167#discussion_r215314527
  
    --- Diff: docs/monitoring.md ---
    @@ -388,6 +388,163 @@ value triggering garbage collection on jobs, and `spark.ui.retainedStages` that
     Note that the garbage collection takes place on playback: it is possible to retrieve
     more entries by increasing these values and restarting the history server.
     
    +### Executor Task Metrics
    +
    +The REST API exposes the values of the Task Metrics collected by Spark executors at the
    +task execution level. The metrics can be used for performance troubleshooting.
    +A list of the available metrics with a short description:
    +
    +<table class="table">
    +  <tr><th>Spark Executor Task Metric name</th>
    +      <th>Short description</th>
    +  </tr>
    +  <tr>
    +    <td>executorRunTime</td>
    +    <td>Time the executor spent running this task. This includes time fetching shuffle data.
    --- End diff --
    
    Does `Time` mean `elapsed time` or other `time`?


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