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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GEARPUMP-358) Performance regression due to costly watermark calculation
Date Wed, 18 Oct 2017 11:38:00 GMT

    [ https://issues.apache.org/jira/browse/GEARPUMP-358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16209175#comment-16209175
] 

ASF GitHub Bot commented on GEARPUMP-358:
-----------------------------------------

Github user codecov-io commented on the issue:

    https://github.com/apache/incubator-gearpump/pull/232
  
    # [Codecov](https://codecov.io/gh/apache/incubator-gearpump/pull/232?src=pr&el=h1)
Report
    > Merging [#232](https://codecov.io/gh/apache/incubator-gearpump/pull/232?src=pr&el=desc)
into [master](https://codecov.io/gh/apache/incubator-gearpump/commit/175b08e64c3363a2da9c61e05dac5f01d1f8db2d?src=pr&el=desc)
will **decrease** coverage by `0.04%`.
    > The diff coverage is `40%`.
    
    
    
    ```diff
    @@            Coverage Diff             @@
    ##           master     #232      +/-   ##
    ==========================================
    - Coverage   69.01%   68.96%   -0.05%     
    ==========================================
      Files         191      191              
      Lines        6119     6123       +4     
      Branches      358      357       -1     
    ==========================================
      Hits         4223     4223              
    - Misses       1896     1900       +4
    ```
    



> Performance regression due to costly watermark calculation
> ----------------------------------------------------------
>
>                 Key: GEARPUMP-358
>                 URL: https://issues.apache.org/jira/browse/GEARPUMP-358
>             Project: Apache Gearpump
>          Issue Type: Bug
>            Reporter: Huafeng Wang
>
> For example, in streaming example SOL, everytime SOLStreamProducer output a message to
downstream, it will send a Watermark message to itself, which will trigger watermark calculation.
We should avoid flooding Watermark messages.



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