Github user peterableda commented on a diff in the pull request:

    https://github.com/apache/spark/pull/12395#discussion_r59743938
  
    --- Diff: 
core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala ---
    @@ -104,6 +104,8 @@ private[spark] class StaticMemoryManager(
     
     private[spark] object StaticMemoryManager {
     
    +  private val MIN_MEMORY_BYTES = 450 * 1024 * 1024
    --- End diff --
    
    I used the same constant (1.5 * 300 * 1024 * 1024) as the one in the 
`UnifiedMemoryManager`. 
    
https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/memory/UnifiedMemoryManager.scala#L190
    
    I'm open to any recommendation here though. :)



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