hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Phabricator (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-4250) Closing lots of RecordWriters is slow
Date Fri, 29 Mar 2013 15:39:16 GMT

     [ https://issues.apache.org/jira/browse/HIVE-4250?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Phabricator updated HIVE-4250:
------------------------------

    Attachment: HIVE-4250.D9807.1.patch

omalley requested code review of "HIVE-4250 [jira] Closing lots of RecordWriters is slow".

Reviewers: JIRA

add threadpool for close writers

In FileSinkOperator, all of the RecordWriters are closed sequentially. For queries with a
lot of dynamic partitions this can add substantially to the task time. For one query in particular,
after processing all of the records in a few minutes the reduces spend 15 minutes closing
all of the RC files.

TEST PLAN
  EMPTY

REVISION DETAIL
  https://reviews.facebook.net/D9807

AFFECTED FILES
  ql/src/java/org/apache/hadoop/hive/ql/exec/FileSinkOperator.java

MANAGE HERALD RULES
  https://reviews.facebook.net/herald/view/differential/

WHY DID I GET THIS EMAIL?
  https://reviews.facebook.net/herald/transcript/23415/

To: JIRA, omalley

                
> Closing lots of RecordWriters is slow
> -------------------------------------
>
>                 Key: HIVE-4250
>                 URL: https://issues.apache.org/jira/browse/HIVE-4250
>             Project: Hive
>          Issue Type: New Feature
>          Components: Serializers/Deserializers
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>         Attachments: HIVE-4250.D9807.1.patch
>
>
> In FileSinkOperator, all of the RecordWriters are closed sequentially. For queries with
a lot of dynamic partitions this can add substantially to the task time. For one query in
particular, after processing all of the records in a few minutes the reduces spend 15 minutes
closing all of the RC files.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message