Kay Ousterhout created SPARK-5845:
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Summary: Time to cleanup intermediate shuffle files not included
in shuffle write time
Key: SPARK-5845
URL: https://issues.apache.org/jira/browse/SPARK-5845
Project: Spark
Issue Type: Bug
Components: Shuffle
Affects Versions: 1.2.1, 1.3.0
Reporter: Kay Ousterhout
Priority: Minor
When the disk is contended, I've observed cases when it takes as long as 7
seconds to clean up all of the intermediate spill files for a shuffle (when
using the sort based shuffle, but bypassing merging because there are <=200
shuffle partitions). This is even when the shuffle data is non-huge (152MB
written from one of the tasks where I observed this). This is effectively part
of the shuffle write time (because it's a necessary side effect of writing data
to disk) so should be added to the shuffle write time to facilitate debugging.
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