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https://issues.apache.org/jira/browse/SPARK-42779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17700316#comment-17700316
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Apache Spark commented on SPARK-42779:
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User 'aokolnychyi' has created a pull request for this issue:
https://github.com/apache/spark/pull/40421
> Allow V2 writes to indicate advisory partition size
> ---------------------------------------------------
>
> Key: SPARK-42779
> URL: https://issues.apache.org/jira/browse/SPARK-42779
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.5.0
> Reporter: Anton Okolnychyi
> Priority: Major
>
> Data sources may request a particular distribution and ordering of data for
> V2 writes. If AQE is enabled, the default session advisory partition size
> (64MB) will be used as guidance. Unfortunately, this default value can still
> lead to small files because the written data can be compressed nicely using
> columnar file formats. Spark should allow data sources to indicate the
> advisory shuffle partition size, just like it lets data sources request a
> particular number of partitions.
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