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https://issues.apache.org/jira/browse/SPARK-34488?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean R. Owen reassigned SPARK-34488:
------------------------------------

    Assignee: Ron Hu

> Support task Metrics Distributions and executor Metrics Distributions in the 
> REST API call for a specified stage
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-34488
>                 URL: https://issues.apache.org/jira/browse/SPARK-34488
>             Project: Spark
>          Issue Type: Sub-task
>          Components: Spark Core
>    Affects Versions: 3.0.2
>            Reporter: Ron Hu
>            Assignee: Ron Hu
>            Priority: Major
>         Attachments: executorMetricsDistributions.json, 
> taskMetricsDistributions.json
>
>
> For a specific stage, it is useful to show the task metrics in percentile 
> distribution.  This information can help users know whether or not there is a 
> skew/bottleneck among tasks in a given stage.  We list an example in 
> [^taskMetricsDistributions.json]
> Similarly, it is useful to show the executor metrics in percentile 
> distribution for a specific stage. This information can show whether or not 
> there is a skewed load on some executors.  We list an example in 
> [^executorMetricsDistributions.json]
>  
> We define withSummaries query parameter in the REST API for a specific stage 
> as:
> applications/<application_id>/<application_attempt/stages/<stage_id>/<stage_attempt>?withSummaries=[true|false]&quantiles=0.0,0.25,0.5,0.75,1.0
>  * When withSummaries=true, both task metrics in percentile distribution and 
> executor metrics in percentile distribution are included in the REST API 
> output.  The default value of withSummaries is false, i.e. no metrics 
> percentile distribution will be included in the REST API output.
>  * Query parameter quantiles define the quantiles we use to calculate metrics 
> distributions.  It takes effect only when {{withSummaries=true.}}  Its 
> default value is {{0.0,0.25,0.5,0.75,1.0.}}  
>  



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