Ziqi Liu created SPARK-40418:
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Summary: 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
Affects Versions: 3.4.0
Reporter: Ziqi Liu
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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