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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 11:21:00 GMT

    [ https://issues.apache.org/jira/browse/GEARPUMP-358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16209161#comment-16209161
] 

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

GitHub user huafengw opened a pull request:

    https://github.com/apache/incubator-gearpump/pull/232

    [GEARPUMP-358] Decrease the frequency of watermark calculation

    Be sure to do all of the following to help us incorporate your contribution
    quickly and easily:
    
     - [ ] Make sure the commit message is formatted like:
       `[GEARPUMP-<Jira issue #>] Meaningful description of pull request` 
     - [ ] Make sure tests pass via `sbt clean test`.
     - [ ] Make sure old documentation affected by the pull request has been updated and new
documentation added for new functionality. 
    


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/huafengw/incubator-gearpump regre

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/incubator-gearpump/pull/232.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #232
    
----
commit 3456bfcfe1fa643f37dedbb88c6e4090d6df5823
Author: huafengw <fvunicorn@gmail.com>
Date:   2017-10-18T11:19:44Z

    [GEARPUMP-358] Decrease the frequency of watermark calculation

----


> 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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