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Posted to issues@spark.apache.org by "caican (Jira)" <ji...@apache.org> on 2022/03/16 02:52:00 UTC
[jira] [Updated] (SPARK-38559) display number of empty partitions on spark ui when demoting join from broadcast-hash to smj
[ https://issues.apache.org/jira/browse/SPARK-38559?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
caican updated SPARK-38559:
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Summary: display number of empty partitions on spark ui when demoting join from broadcast-hash to smj (was: show number of empty partitions on spark ui when demoting join from broadcast-hash to smj)
> display number of empty partitions on spark ui when demoting join from broadcast-hash to smj
> --------------------------------------------------------------------------------------------
>
> Key: SPARK-38559
> URL: https://issues.apache.org/jira/browse/SPARK-38559
> Project: Spark
> Issue Type: Improvement
> Components: SQL, Web UI
> Affects Versions: 3.1.2
> Reporter: caican
> Priority: Major
>
> When demoting join from broadcast-hash to smj, i think it is necessary to show number of empty partitions on spark ui.
> Otherwise, users might wonder why SMJ is used when joining a small table. Displaying the number of empty partitions is useful for users to understand changes to the execution plan.
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