GitHub user Ben-Zvi opened a pull request:
https://github.com/apache/drill/pull/879
DRILL-5669: Add a configurable option for minimum memory allocation tâ¦
â¦o buffered ops
Added the option "planner.memory.min_memory_per_buffered_op" to enforce a
minimum memory allocation to all buffered ops instances (i.e., External Sort or
Hash Agg (either phase)).
Default value setting is 40 MB (to cover cases of a large incoming batch,
while the query's memory divided among all buffered ops results in a small
share per each).
There is a small risk of total allocation by default (i.e. 40MB * num-ops)
may exceed the query's total memory; but this happens anyway with
"uncontrolled" ops like hash join.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/Ben-Zvi/drill DRILL-5669
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/drill/pull/879.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 #879
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commit 9ffdb6adc72c7689bc088171d9b978fc161970f3
Author: Boaz Ben-Zvi <[email protected]>
Date: 2017-07-17T21:21:29Z
DRILL-5669: Add a configurable option for minimum memory allocation to
buffered ops
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