GitHub user paul-rogers opened a pull request:
https://github.com/apache/drill/pull/754
DRILL-5275: Sort spill is slow due to repeated allocations
DRILL-5275 - Sort spill serialization is slow due to repeated buffer
allocations
Rather than create a heap buffer per vector when writing and reading,
the revised code creates a single, shared buffer used for all I/O
within a particular container. This improves performance by reducing GC
and CPU costs during I/Os.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/paul-rogers/drill DRILL-5275
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/drill/pull/754.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 #754
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commit 60b95f777eefe343fd49e380d03128090fd96a7a
Author: Paul Rogers <[email protected]>
Date: 2017-02-20T01:53:31Z
DRILL-5275 Sort spill is slow due to repeated allocations
DRILL-5275 - Sort spill serialization is slow due to repeated buffer
allocations
Rather than create a heap buffer per vector when writing and reading,
the revised code creates a single, shared buffer used for all I/O
within a particular container. This improves performance by reducing GC
and CPU costs during I/Os.
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