GitHub user davies opened a pull request:
https://github.com/apache/spark/pull/10605
[SPARK-12295] [SQL] external spilling for window functions
This PR manage the memory used by window functions (buffered rows), also
enable external spilling.
After this PR, we can run window functions on a partition with hundreds of
millions of rows with only 1G.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/davies/spark unsafe_window
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10605.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 #10605
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commit 6b98593fb969e9c0dfdde3ced313dff101791d1c
Author: Davies Liu <[email protected]>
Date: 2016-01-05T08:30:27Z
external spilling for window functions
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