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Posted to issues@spark.apache.org by "Hyukjin Kwon (Jira)" <ji...@apache.org> on 2022/09/14 03:14:00 UTC

[jira] [Updated] (SPARK-40418) Increase default initialNumPartitions to 10

     [ https://issues.apache.org/jira/browse/SPARK-40418?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyukjin Kwon updated SPARK-40418:
---------------------------------
    Component/s: SQL

> Increase default initialNumPartitions to 10
> -------------------------------------------
>
>                 Key: SPARK-40418
>                 URL: https://issues.apache.org/jira/browse/SPARK-40418
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core, SQL
>    Affects Versions: 3.4.0
>            Reporter: Ziqi Liu
>            Priority: Major
>
> It's actually an follow-up from SPARK-40211
> The previous default value for initialNumPartitions is 1, which is way too small. Change to 10 might be a reasonable value to achieve a middle-ground trade-off, and will be beneficial in most cases (unless partition num is too small, but in that case either initialNumPartitions and scaleUpFactor won't have significant effect)



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