hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Dong Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-7685) Parquet memory manager
Date Tue, 30 Dec 2014 08:58:13 GMT

    [ https://issues.apache.org/jira/browse/HIVE-7685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14260929#comment-14260929
] 

Dong Chen commented on HIVE-7685:
---------------------------------

The value is correctly passed down after verification.

> Parquet memory manager
> ----------------------
>
>                 Key: HIVE-7685
>                 URL: https://issues.apache.org/jira/browse/HIVE-7685
>             Project: Hive
>          Issue Type: Improvement
>          Components: Serializers/Deserializers
>            Reporter: Brock Noland
>            Assignee: Dong Chen
>         Attachments: HIVE-7685.1.patch, HIVE-7685.1.patch.ready, HIVE-7685.patch, HIVE-7685.patch.ready
>
>
> Similar to HIVE-4248, Parquet tries to write large very large "row groups". This causes
Hive to run out of memory during dynamic partitions when a reducer may have many Parquet files
open at a given time.
> As such, we should implement a memory manager which ensures that we don't run out of
memory due to writing too many row groups within a single JVM.



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

Mime
View raw message