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Posted to issues@tez.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2015/07/26 06:03:04 UTC

[jira] [Updated] (TEZ-2644) UnorderedKVOutputWriter has unnecessary synchronized blocks

     [ https://issues.apache.org/jira/browse/TEZ-2644?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gopal V updated TEZ-2644:
-------------------------
    Attachment: flink-1-1-edge.png
                dataoutputstream-sync.png

> UnorderedKVOutputWriter has unnecessary synchronized blocks 
> ------------------------------------------------------------
>
>                 Key: TEZ-2644
>                 URL: https://issues.apache.org/jira/browse/TEZ-2644
>             Project: Apache Tez
>          Issue Type: Bug
>    Affects Versions: 0.8.0, 0.7.1
>            Reporter: Gopal V
>              Labels: Performance
>         Attachments: dataoutputstream-sync.png, flink-1-1-edge.png
>
>
> Nearly 50% of the CPU samples for Unordered 1-1 edges are either in ByteArrayOutputStream or DataOutputStream synchronization primitives.
> !flink-1-1-edge.png!
> !dataoutputstream-sync.png!



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