GitHub user davies opened a pull request:
https://github.com/apache/spark/pull/3252
[SPARK-4384] [PySpark] improve sort spilling
If there some big broadcasts (or other object) in Python worker, the free
memory could be used for sorting will be too small, then it will keep spilling
small files into disks, finally failed with too many open files.
This PR try to delay the spilling until the used memory goes over limit and
start to increase since last spilling, it will increase the size of spilling
files, improve the stability and performance in this cases. (We also do this in
ExternalAggregator).
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/davies/spark sort
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/3252.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #3252
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commit 711fb6c7e435147c96cc15d96c7588f14d7915d7
Author: Davies Liu <[email protected]>
Date: 2014-11-13T20:01:18Z
improve sort spilling
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