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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2018/01/17 09:38:00 UTC
[jira] [Commented] (SPARK-23129) Lazy init
DiskMapIterator#deserializeStream to reduce memory usage when
ExternalAppendOnlyMap spill too much times
[ https://issues.apache.org/jira/browse/SPARK-23129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16328543#comment-16328543 ]
Apache Spark commented on SPARK-23129:
--------------------------------------
User 'caneGuy' has created a pull request for this issue:
https://github.com/apache/spark/pull/20292
> Lazy init DiskMapIterator#deserializeStream to reduce memory usage when ExternalAppendOnlyMap spill too much times
> -------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-23129
> URL: https://issues.apache.org/jira/browse/SPARK-23129
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.1.0
> Reporter: zhoukang
> Priority: Major
>
> Currently,the deserializeStream in ExternalAppendOnlyMap#DiskMapIterator init when DiskMapIterator instance created.This will cause memory use overhead when ExternalAppendOnlyMap spill too much times.
> We can avoid this by making deserializeStream init when it is used the first time.
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