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Posted to issues@spark.apache.org by "Davies Liu (JIRA)" <ji...@apache.org> on 2015/08/06 20:35:04 UTC
[jira] [Updated] (SPARK-8890) Reduce memory consumption for dynamic
partition insert
[ https://issues.apache.org/jira/browse/SPARK-8890?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Davies Liu updated SPARK-8890:
------------------------------
Assignee: Michael Armbrust (was: Davies Liu)
> Reduce memory consumption for dynamic partition insert
> ------------------------------------------------------
>
> Key: SPARK-8890
> URL: https://issues.apache.org/jira/browse/SPARK-8890
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Michael Armbrust
> Priority: Critical
>
> Currently, InsertIntoHadoopFsRelation can run out of memory if the number of table partitions is large. The problem is that we open one output writer for each partition, and when data are randomized and when the number of partitions is large, we open a large number of output writers, leading to OOM.
> The solution here is to inject a sorting operation once the number of active partitions is beyond a certain point (e.g. 50?)
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