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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2015/07/31 04:01:05 UTC
[jira] [Assigned] (SPARK-9240) Hybrid aggregate operator using
unsafe row
[ https://issues.apache.org/jira/browse/SPARK-9240?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-9240:
-----------------------------------
Assignee: (was: Apache Spark)
> Hybrid aggregate operator using unsafe row
> ------------------------------------------
>
> Key: SPARK-9240
> URL: https://issues.apache.org/jira/browse/SPARK-9240
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Yin Huai
> Priority: Blocker
>
> We need a hybrid aggregate operator, which first tries hash-based aggregations and gracefully switch to sort-based aggregations if the hash map's memory footprint exceeds a given threshold (how to track memory footprint and how to set the threshold?).
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