JkSelf commented on a change in pull request #27669: [SPARK-30918][SQL] improve
the splitting of skewed partitions
URL: https://github.com/apache/spark/pull/27669#discussion_r382878571
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
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@@ -445,6 +445,7 @@ object SQLConf {
" this factor multiple the median partition size and also larger than
" +
s" ${ADAPTIVE_EXECUTION_SKEWED_PARTITION_SIZE_THRESHOLD.key}")
.intConf
+ .checkValue(_ > 0, "The skew factor must be positive.")
Review comment:
When the `nonSkewSizes ` is very small. The `targetSize ` will be small
without this config. Then it will split more small task when handling skewed
partition? So we may need this config.
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