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Posted to issues@hive.apache.org by "Prasanth Jayachandran (JIRA)" <ji...@apache.org> on 2018/06/12 23:26:00 UTC

[jira] [Updated] (HIVE-19875) increase LLAP IO queue size for perf

     [ https://issues.apache.org/jira/browse/HIVE-19875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Prasanth Jayachandran updated HIVE-19875:
-----------------------------------------
    Status: Patch Available  (was: Open)

> increase LLAP IO queue size for perf
> ------------------------------------
>
>                 Key: HIVE-19875
>                 URL: https://issues.apache.org/jira/browse/HIVE-19875
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 3.1.0, 4.0.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>            Priority: Major
>         Attachments: HIVE-19875.1.patch
>
>
> According to [~gopalv] queue limit has perf impact, esp. during hashtable load for mapjoin where in the past IO used to queue up more data for processing to process.
> 1) Overall the default limit could be adjusted higher.
> 2) Depending on Decimal64 availability, the weight for decimal columns could be reduced.



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