[jira] [Commented] (HIVE-10191) ORC: Cleanup writer per-row synchronization

["Gopal V (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-10191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14392278#comment-14392278 ] 

Gopal V commented on HIVE-10191:
--------------------------------

[~owen.omalley]/[~prasanth_j]: FYI.

> ORC: Cleanup writer per-row synchronization
> -------------------------------------------
>
>                 Key: HIVE-10191
>                 URL: https://issues.apache.org/jira/browse/HIVE-10191
>             Project: Hive
>          Issue Type: Bug
>          Components: File Formats
>    Affects Versions: 1.2.0
>            Reporter: Gopal V
>            Assignee: Gopal V
>
> ORC writers were originally meant to be thread-safe, but in the present day implementation each ORC writer is entirely share-nothing which converts most of the synchronized blocks in ORC as entirely uncontested locks.
> These uncontested locks prevent the JVM from inlining/optimizing these methods, while adding no extra thread-safety to the ORC writers.



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