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From "Prasanth Jayachandran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-20147) Hive streaming ingest is contented on synchronized logging
Date Fri, 13 Jul 2018 18:23:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-20147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16543566#comment-16543566
] 

Prasanth Jayachandran commented on HIVE-20147:
----------------------------------------------

[~gopalv] can you please review this? This just updates log level from INFO to DEBUG. 

> Hive streaming ingest is contented on synchronized logging
> ----------------------------------------------------------
>
>                 Key: HIVE-20147
>                 URL: https://issues.apache.org/jira/browse/HIVE-20147
>             Project: Hive
>          Issue Type: Bug
>          Components: Streaming, Transactions
>    Affects Versions: 4.0.0, 3.2.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>            Priority: Major
>         Attachments: HIVE-20147.1.patch, Screen Shot 2018-07-11 at 4.17.27 PM.png, sync-logger-contention.svg
>
>
> In one of the observed profile, >30% time spent on synchronized logging. See attachment. 
> We should use async logging for hive streaming ingest by default.  !Screen Shot 2018-07-11
at 4.17.27 PM.png!



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