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Posted to issues@trafodion.apache.org by "Selvaganesan Govindarajan (JIRA)" <ji...@apache.org> on 2017/05/23 17:56:04 UTC

[jira] [Closed] (TRAFODION-2134) Change the overflow_mode to 'DISK' by default

     [ https://issues.apache.org/jira/browse/TRAFODION-2134?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Selvaganesan Govindarajan closed TRAFODION-2134.
------------------------------------------------

> Change the overflow_mode to 'DISK' by default
> ---------------------------------------------
>
>                 Key: TRAFODION-2134
>                 URL: https://issues.apache.org/jira/browse/TRAFODION-2134
>             Project: Apache Trafodion
>          Issue Type: Bug
>          Components: sql-exe
>    Affects Versions: 2.1-incubating
>            Reporter: Selvaganesan Govindarajan
>            Assignee: Selvaganesan Govindarajan
>             Fix For: 2.1-incubating
>
>   Original Estimate: 24h
>  Remaining Estimate: 24h
>
> In queries involving Block Memory Operators (BMOs), Trafodion can overflow the data from the data flow into scratch files. These scratch files are currently being memory mapped which puts pressure on the memory usage on the node when there is large amount of  overflow. The default needs to be changed to DISK



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