LuciferYang commented on a change in pull request #34792:
URL: https://github.com/apache/spark/pull/34792#discussion_r761787184
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File path: core/src/main/scala/org/apache/spark/rdd/NewHadoopRDD.scala
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@@ -123,6 +123,10 @@ class NewHadoopRDD[K, V](
override def getPartitions: Array[Partition] = {
val inputFormat = inputFormatClass.getConstructor().newInstance()
+ // setMinPartitions below will call FileInputFormat.listStatus(), which
can be quite slow when
+ // traversing a large number of directories and files. Parallelize it.
+ _conf.setIfUnset(FileInputFormat.LIST_STATUS_NUM_THREADS,
+ Runtime.getRuntime.availableProcessors().toString)
Review comment:
Will this `availableProcessors` get the actual number of available CPU
cores in container instances, VM instances and physical machine instances?
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