GitHub user srowen opened a pull request:
https://github.com/apache/spark/pull/13618
[SPARK-15796] [CORE] Reduce spark.memory.fraction default to avoid
overrunning old gen in JVM default config
## What changes were proposed in this pull request?
Reduce `spark.memory.fraction` default to 0.66 in order to make it fit
within default JVM old generation size (2/3 heap). See JIRA discussion. This
means a full cache doesn't spill into the new gen. CC @andrewor14
## How was this patch tested?
Jenkins tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/srowen/spark SPARK-15796
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13618.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 #13618
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commit 57f7ac2575d16274d4696a6ecb9752472f8e98af
Author: Sean Owen <[email protected]>
Date: 2016-06-09T09:47:08Z
Reduce spark.memory.fraction default to 0.66
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