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https://issues.apache.org/jira/browse/TRAFODION-2134?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15398697#comment-15398697
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ASF GitHub Bot commented on TRAFODION-2134:
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GitHub user selvaganesang opened a pull request:
https://github.com/apache/incubator-trafodion/pull/628
[TRAFODION-2134] Change the overflow_mode to 'DISK' by default
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/selvaganesang/incubator-trafodion
trafodion-2134
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-trafodion/pull/628.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #628
----
commit 675017b05dcdeb3e6f3c6768517ffb2091fb482d
Author: selvaganesang <[email protected]>
Date: 2016-07-29T04:36:30Z
[TRAFODION-2134] Change the overflow_mode to 'DISK' by default
----
> 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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