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Posted to issues@trafodion.apache.org by "Prashanth Vasudev (JIRA)" <ji...@apache.org> on 2017/05/08 21:32:04 UTC

[jira] [Resolved] (TRAFODION-2604) sort operator merge phase memory pool improvement

     [ https://issues.apache.org/jira/browse/TRAFODION-2604?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Prashanth Vasudev resolved TRAFODION-2604.
------------------------------------------
    Resolution: Fixed

> sort operator merge phase memory pool improvement 
> --------------------------------------------------
>
>                 Key: TRAFODION-2604
>                 URL: https://issues.apache.org/jira/browse/TRAFODION-2604
>             Project: Apache Trafodion
>          Issue Type: Bug
>            Reporter: Prashanth Vasudev
>            Assignee: Prashanth Vasudev
>             Fix For: 2.2-incubating
>
>
> Currently, executor sort goes through initial sort phase followed by merge phase in overflow situation. The memory pool used during sort phase is not efficiently reused for merge phase , causing sort merge to slow down in case of large merge. Sort merge happens only if sort overflows.
> Fix is to detect overflow situation and reuse the memory pool for merge phase.



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