GitHub user viirya opened a pull request:
https://github.com/apache/spark/pull/16865
[SPARK-19530][SQL] Use guava weigher for code cache eviction
## What changes were proposed in this pull request?
We use guava cache to cache compiled codes for codegen. Currently we use
number of entries (100 as maximum now) in the cache to determine when to evict
older entries.
However, the number of entries can't respond well to actually memory usage
of cache entries. As we heavily rely codegen now and the generated codes can be
large, we shouldn't use maximum of entries.
This patch turns to use `Weigher` in guava. We use the size of bytecode as
the weight of an entry.
## How was this patch tested?
Jenkins tests.
Please review http://spark.apache.org/contributing.html before opening a
pull request.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/viirya/spark-1 use-weight-for-code-cache
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16865.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 #16865
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commit e6e2a8dd95512047346b939fc305dfaaef67f592
Author: Liang-Chi Hsieh <[email protected]>
Date: 2017-02-09T07:18:23Z
Use weight for code cache.
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