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https://issues.apache.org/jira/browse/STORM-1057?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14938784#comment-14938784
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ASF GitHub Bot commented on STORM-1057:
---------------------------------------

Github user revans2 commented on a diff in the pull request:

    https://github.com/apache/storm/pull/753#discussion_r40845429
  
    --- Diff: storm-core/src/clj/backtype/storm/daemon/executor.clj ---
    @@ -550,14 +553,16 @@
             has-ackers? (has-ackers? storm-conf)
             has-eventloggers? (has-eventloggers? storm-conf)
             emitted-count (MutableLong. 0)
    -        empty-emit-streak (MutableLong. 0)]
    -   
    +        empty-emit-streak (MutableLong. 0)
    +        spout-counts (count task-datas)
    --- End diff --
    
    spout-counts does not appear to be used anywhere.


> Add throughput metric to spout/bolt and display them on web ui
> --------------------------------------------------------------
>
>                 Key: STORM-1057
>                 URL: https://issues.apache.org/jira/browse/STORM-1057
>             Project: Apache Storm
>          Issue Type: New Feature
>          Components: storm-core
>            Reporter: Li Wang
>            Assignee: Li Wang
>   Original Estimate: 168h
>  Remaining Estimate: 168h
>
> Throughput is a fundamental metric to reasoning about the performance 
> bottleneck of a topology. Displaying the throughputs of components and tasks 
> on the web ui could greatly facilitate the user identifying the performance 
> bottleneck and checking whether the the workload among components and tasks 
> are balanced. 
> What to do:
> 1. Measure the throughput of each spout/bolt.
> 2. Display the throughput metrics on web UI.



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