Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/23055#discussion_r236481476 --- Diff: core/src/main/scala/org/apache/spark/api/python/PythonRunner.scala --- @@ -74,8 +74,13 @@ private[spark] abstract class BasePythonRunner[IN, OUT]( private val reuseWorker = conf.getBoolean("spark.python.worker.reuse", true) // each python worker gets an equal part of the allocation. the worker pool will grow to the // number of concurrent tasks, which is determined by the number of cores in this executor. - private val memoryMb = conf.get(PYSPARK_EXECUTOR_MEMORY) + private val memoryMb = if (Utils.isWindows) { --- End diff -- > The allocation on the JVM side is still the correct behavior. Also, is it ever tested on Windows?
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