GitHub user rxin opened a pull request:
https://github.com/apache/spark/pull/1152
[SPARK-1412][SQL] Disable partial aggregation automatically when reduction
factor is low - WIP
This is just a prototype. Kinda ugly, doesn't properly connect with the
config system yet, and have no test.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/rxin/spark partialAggDisable
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/1152.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 #1152
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commit 6360e117de927b77a61b5e4f03ac52eb400c1825
Author: Reynold Xin <r...@apache.org>
Date: 2014-06-20T08:05:22Z
Prototype for disable partial aggregation when we don't see reduction.
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