GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/20483
[SPARK-23312][SQL] add a config to turn off vectorized cache reader
## What changes were proposed in this pull request?
https://issues.apache.org/jira/browse/SPARK-23309 reported a performance
regression about cached table in Spark 2.3. While the investigating is still
going on, this PR adds a conf to turn off the vectorized cache reader, to
unblock the 2.3 release.
## How was this patch tested?
a new test
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark cache
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/20483.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 #20483
----
commit 376c85526f4ec2328f2d05a0816f632c7dd9379f
Author: Wenchen Fan <wenchen@...>
Date: 2018-02-02T05:55:01Z
add a config to turn off vectorized cache reader
----
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
