hive-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Rui Li (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-13293) Query occurs performance degradation after enabling parallel order by for Hive on Spark
Date Sun, 15 May 2016 13:00:14 GMT

     [ https://issues.apache.org/jira/browse/HIVE-13293?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rui Li updated HIVE-13293:
--------------------------
    Attachment: HIVE-13293.3.patch

[~xuefuz] - yeah sampling is needed only if we have more than 1 partitions. So we don't need
cache in case of single reducer order by.
Not sure why the build failed. Upload same patch to try again.

> Query occurs performance degradation after enabling parallel order by for Hive on Spark
> ---------------------------------------------------------------------------------------
>
>                 Key: HIVE-13293
>                 URL: https://issues.apache.org/jira/browse/HIVE-13293
>             Project: Hive
>          Issue Type: Bug
>          Components: Spark
>    Affects Versions: 2.0.0
>            Reporter: Lifeng Wang
>            Assignee: Rui Li
>         Attachments: HIVE-13293.1.patch, HIVE-13293.2.patch, HIVE-13293.3.patch, HIVE-13293.3.patch
>
>
> I use TPCx-BB to do some performance test on Hive on Spark engine. And found query 10
has performance degradation when enabling parallel order by.
> It seems that sampling cost much time before running the real query.



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

Mime
View raw message