Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/9344#discussion_r44161411
--- Diff: core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
---
@@ -306,7 +194,7 @@ private[spark] abstract class MemoryManager(conf:
SparkConf, numCores: Int) exte
val cores = if (numCores > 0) numCores else
Runtime.getRuntime.availableProcessors()
// Because of rounding to next power of 2, we may have safetyFactor as
8 in worst case
val safetyFactor = 16
- val size = ByteArrayMethods.nextPowerOf2(maxExecutionMemory / cores /
safetyFactor)
+ val size = ByteArrayMethods.nextPowerOf2(maxOnHeapExecutionMemory /
cores / safetyFactor)
--- End diff --
Is this right in off-heap mode?
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