[jira] [Commented] (FLINK-7608) LatencyGauge change to histogram metric

[ASF GitHub Bot (JIRA)]

    [ 
https://issues.apache.org/jira/browse/FLINK-7608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16204672#comment-16204672
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ASF GitHub Bot commented on FLINK-7608:
---------------------------------------

Github user yew1eb commented on the issue:

    https://github.com/apache/flink/pull/4826
  
    
[LatencyStatsJob.java](https://gist.github.com/yew1eb/3329239f866b691364f4d11a7f0a846a)
    "Source1" and "Source2"  Source send a LatencyMarker per 200ms.
    "Map-1-A" and "Map-2-B" Map Opreater random sleep a few milliseconds.
    
    The following figure shows the latency statistics of **Map-2-B**:
    <img width="1144" alt="wx20171014-230347 2x" 
src="https://user-images.githubusercontent.com/4133864/31576890-1c7d672c-b0ca-11e7-8abd-f761e072fccd.png";>
    
    
    The following figure shows the latency statistics of **Sink: Print**:
    <img width="1158" alt="latency_stat_sink" 
src="https://user-images.githubusercontent.com/4133864/31576900-67086e72-b0ca-11e7-8247-1c8310e58cf0.png";>
    
    R: @zentol  @rmetzger 



> LatencyGauge change to  histogram metric
> ----------------------------------------
>
>                 Key: FLINK-7608
>                 URL: https://issues.apache.org/jira/browse/FLINK-7608
>             Project: Flink
>          Issue Type: Bug
>          Components: Metrics
>            Reporter: Hai Zhou UTC+8
>            Assignee: Hai Zhou UTC+8
>            Priority: Blocker
>             Fix For: 1.4.0, 1.3.3
>
>
> I used slf4jReporter[https://issues.apache.org/jira/browse/FLINK-4831]  to 
> export metrics the log file.
> I found:
> {noformat}
> -- Gauges 
> ---------------------------------------------------------------------
> ......
> zhouhai-mbp.taskmanager.f3fd3a269c8c3da4e8319c8f6a201a57.Flink Streaming 
> Job.Map.0.latency:
>  value={LatencySourceDescriptor{vertexID=1, subtaskIndex=-1}={p99=116.0, 
> p50=59.5, min=11.0, max=116.0, p95=116.0, mean=61.833333333333336}}
> zhouhai-mbp.taskmanager.f3fd3a269c8c3da4e8319c8f6a201a57.Flink Streaming 
> Job.Sink- Unnamed.0.latency: 
> value={LatencySourceDescriptor{vertexID=1, subtaskIndex=0}={p99=195.0, 
> p50=163.5, min=115.0, max=195.0, p95=195.0, mean=161.0}}
> ......
> {noformat}



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