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From "Lefty Leverenz (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-13027) Configuration changes to improve logging performance
Date Thu, 01 Sep 2016 05:47:20 GMT

    [ https://issues.apache.org/jira/browse/HIVE-13027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15454400#comment-15454400
] 

Lefty Leverenz commented on HIVE-13027:
---------------------------------------

Thanks Prasanth.  I added *hive.async.log.enabled* to the Configuration Properties doc:

* [Configuration Properties -- hive.async.log.enabled | https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.async.log.enabled]

> Configuration changes to improve logging performance
> ----------------------------------------------------
>
>                 Key: HIVE-13027
>                 URL: https://issues.apache.org/jira/browse/HIVE-13027
>             Project: Hive
>          Issue Type: Improvement
>          Components: Logging
>    Affects Versions: 2.1.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>             Fix For: 2.1.0
>
>         Attachments: HIVE-13027.1.patch, HIVE-13027.2.patch, HIVE-13027.3.patch, HIVE-13027.3.patch,
HIVE-13027.4.patch
>
>
> For LLAP and HS2, some configuration changes can be made to improve logging performance
> 1) LOG4j2's async logger claims to have 6-68 times better performance than synchronous
logger. https://logging.apache.org/log4j/2.x/manual/async.html
> 2) Replace File appenders with RandomAccessFileAppender that claims to be 20-200% more
performant.
> https://logging.apache.org/log4j/2.x/manual/appenders.html#RandomAccessFileAppender
> Also make async logging configurable.



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