GitHub user sohami opened a pull request:
https://github.com/apache/drill/pull/920
DRILL-5737: Hash Agg uses more than the allocated memory under certaiâ¦
â¦n low memory conditions
Note: Provide a new config parameter HASHAGG_FALLBACK_ENABLED
which is set to true by default. When 2 Phase
HashAgg doesn't have enough memory to hold 2 partitions then
based on this flag it either fallsback to old
behavior of consuming unbounded memory or it fails the query.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sohami/drill DRILL-5737
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/drill/pull/920.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 #920
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commit b534fd67908ea6cc5471c650bd6c3ae1c193d2f4
Author: Sorabh Hamirwasia <[email protected]>
Date: 2017-08-23T01:20:51Z
DRILL-5737: Hash Agg uses more than the allocated memory under certain low
memory conditions
Note: Provide a new config parameter HASHAGG_FALLBACK_ENABLED
which is set to true by default. When 2 Phase
HashAgg doesn't have enough memory to hold 2 partitions then
based on this flag it either fallsback to old
behavior of consuming unbounded memory or it fails the query.
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