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Posted to issues@hive.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2017/11/07 01:59:00 UTC

[jira] [Updated] (HIVE-17994) Vectorization: Serialization bottlenecked on irrelevant hashmap lookup

     [ https://issues.apache.org/jira/browse/HIVE-17994?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gopal V updated HIVE-17994:
---------------------------
    Attachment: vec-serialize-hashmap.png

> Vectorization: Serialization bottlenecked on irrelevant hashmap lookup
> ----------------------------------------------------------------------
>
>                 Key: HIVE-17994
>                 URL: https://issues.apache.org/jira/browse/HIVE-17994
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Gopal V
>         Attachments: vec-serialize-hashmap.png
>
>
> On machines with slower NUMA, the hashmap lookup for TypeInfo::getPrimitiveCategory is the slowest part of the vectorized serialization loops. The static object references run hot with the NUMA access speeds penalizing half the threads.
> !vec-serialize-hashmap.png!



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