Github user jiangxb1987 commented on a diff in the pull request:
https://github.com/apache/spark/pull/19717#discussion_r155300795
--- Diff:
core/src/main/scala/org/apache/spark/internal/config/package.scala ---
@@ -41,6 +41,10 @@ package object config {
.bytesConf(ByteUnit.MiB)
.createWithDefaultString("1g")
+ private[spark] val DRIVER_MEMORY_OVERHEAD =
ConfigBuilder("spark.driver.memoryOverhead")
--- End diff --
nit: should also add doc for this config here.
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