hive-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Prasanth Jayachandran (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-13255) FloatTreeReader.nextVector is expensive
Date Tue, 29 Mar 2016 22:01:25 GMT

     [ https://issues.apache.org/jira/browse/HIVE-13255?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Prasanth Jayachandran updated HIVE-13255:
-----------------------------------------
    Attachment: HIVE-13255.1.patch

> FloatTreeReader.nextVector is expensive 
> ----------------------------------------
>
>                 Key: HIVE-13255
>                 URL: https://issues.apache.org/jira/browse/HIVE-13255
>             Project: Hive
>          Issue Type: Bug
>          Components: ORC
>    Affects Versions: 2.1.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>         Attachments: HIVE-13255.1.patch, bytecode-size-after.png, bytecode-size-before.png,
float-reader-perf.png, q1-bottleneck.png, q1-warm-perf-map.png
>
>
> Some TPCDS queries on 1TB scale shows FloatTreeReader on profile samples. It is most
likely because of multiple branching and polymorphic dispatch in FloatTreeReader.nextVector()
implementation. See attached image for sampling profile output.



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

Mime
View raw message