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https://issues.apache.org/jira/browse/TRAFODION-3192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16596658#comment-16596658
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Sandhya Sundaresan commented on TRAFODION-3192:
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|Need to check why queue resizing is not working
or not working properly.
Is it working for some operators?
Should it work for other operators as well?
Does it need change at queue level or does it
need to be enabled by the caller operator?|
> UNION ALL up and down queue size default value too small, or not dynamically
> adjusted
> -------------------------------------------------------------------------------------
>
> Key: TRAFODION-3192
> URL: https://issues.apache.org/jira/browse/TRAFODION-3192
> Project: Apache Trafodion
> Issue Type: Bug
> Components: sql-exe
> Affects Versions: any
> Reporter: Sandhya Sundaresan
> Assignee: Sandhya Sundaresan
> Priority: Major
> Fix For: 2.4
>
>
> The union up queue size is hardcoded in nadefaults.cpp as a start value as 16
> which
> is very low if large number of rows are being returned. Scan operator has it
> set to 2048.
> Some operators further adjust this up size from the original value based on
> estimate of
> the number of rows being returned. We can do that for union codegen method and
> also change the original up queue size to 2048.
>
> Noticed that Transpose, Sequence also have the same issue and dynamic queue
> resizing is missing.
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