You are viewing a plain text version of this content. The canonical link for it is here.

Posted to dev@hive.apache.org by "Szehon Ho (JIRA)" <ji...@apache.org> on 2014/11/21 19:54:35 UTC

[jira] [Updated] (HIVE-8943) Fix memory limit check for combine nested mapjoins [Spark Branch]

     [ https://issues.apache.org/jira/browse/HIVE-8943?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Szehon Ho updated HIVE-8943:
----------------------------
    Summary: Fix memory limit check for combine nested mapjoins [Spark Branch]  (was: Fix memory limit check for combine nested mapjoins )

> Fix memory limit check for combine nested mapjoins [Spark Branch]
> -----------------------------------------------------------------
>
>                 Key: HIVE-8943
>                 URL: https://issues.apache.org/jira/browse/HIVE-8943
>             Project: Hive
>          Issue Type: Bug
>          Components: Spark
>    Affects Versions: spark-branch
>            Reporter: Szehon Ho
>
> Its the opposite problem of what we thought in HIVE-8701.
> SparkMapJoinOptimizer actually does combine nested mapjoins into one work due to removal of RS for big-table.  So we actually need to enhance the check to calculate if all the MapJoins in that work (spark-stage) will fit into the memory, otherwise it might overwhelm memory for that particular spark executor.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)