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https://issues.apache.org/jira/browse/SPARK-8861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14651553#comment-14651553
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Apache Spark commented on SPARK-8861:
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User 'zsxwing' has created a pull request for this issue:
https://github.com/apache/spark/pull/7774
> Add basic instrumentation to each SparkPlan operator
> ----------------------------------------------------
>
> Key: SPARK-8861
> URL: https://issues.apache.org/jira/browse/SPARK-8861
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Reynold Xin
>
> The basic metric can be the number of tuples that is flowing through. We can
> add more metrics later.
> In order for this to work, we can add a new "accumulators" method to
> SparkPlan that defines the list of accumulators, .e.g.
> {code}
> def accumulators: Map[String, Accumulator]
> {code}
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