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

    https://github.com/apache/spark/pull/6901#discussion_r32868371
  
    --- Diff: docs/programming-guide.md ---
    @@ -1144,9 +1144,11 @@ generate these on the reduce side. When data does 
not fit in memory Spark will s
     to disk, incurring the additional overhead of disk I/O and increased 
garbage collection.
     
     Shuffle also generates a large number of intermediate files on disk. As of 
Spark 1.3, these files
    --- End diff --
    
    I agree it could be removed too, even if it probably doesn't matter at this 
point since we are well beyond 1.3.


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