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[SPARK-4808] Removing minimum number of elements read before spill check #4420

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[SPARK-4808] Removing minimum number of elements read before spill check #4420

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6 changes: 1 addition & 5 deletions core/src/main/scala/org/apache/spark/util/collection/Spillable.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -42,9 +42,6 @@ private[spark] trait Spillable[C] extends Logging {
// Memory manager that can be used to acquire/release memory
private[this] val shuffleMemoryManager = SparkEnv.get.shuffleMemoryManager

// Threshold for `elementsRead` before we start tracking this collection's memory usage
private[this] val trackMemoryThreshold = 1000

// Initial threshold for the size of a collection before we start tracking its memory usage
// Exposed for testing
private[this] val initialMemoryThreshold: Long =
Expand Down Expand Up @@ -72,8 +69,7 @@ private[spark] trait Spillable[C] extends Logging {
* @return true if `collection` was spilled to disk; false otherwise
*/
protected def maybeSpill(collection: C, currentMemory: Long): Boolean = {
if (elementsRead > trackMemoryThreshold && elementsRead % 32 == 0 &&
currentMemory >= myMemoryThreshold) {
if (elementsRead % 32 == 0 && currentMemory >= myMemoryThreshold) {
// Claim up to double our current memory from the shuffle memory pool
val amountToRequest = 2 * currentMemory - myMemoryThreshold
val granted = shuffleMemoryManager.tryToAcquire(amountToRequest)
Expand Down