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https://issues.apache.org/jira/browse/SPARK-35639?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-35639:
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Assignee: Apache Spark
> Add metrics about coalesced partitions to CustomShuffleReader in AQE
> --------------------------------------------------------------------
>
> Key: SPARK-35639
> URL: https://issues.apache.org/jira/browse/SPARK-35639
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Eugene Koifman
> Assignee: Apache Spark
> Priority: Major
>
> {{CustomShuffleReaderExec}} reports "number of skewed partitions" and "number
> of skewed partition splits".
> It would be useful to also report "number of partitions to coalesce" and
> "number of coalesced partitions" and include this in string rendering of the
> SparkPlan node so that it looks like this
> {code:java}
> (12) CustomShuffleReader
> Input [2]: [a#23, b#24]
> Arguments: coalesced 3 partitions into 1 and split 2 skewed partitions into 4
> {code}
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