ASF GitHub Bot commented on DRILL-6123:

Github user ppadma commented on the issue:

    @paul-rogers Thank you very much for the review. Updated the PR with review 
comments taken care of. Please take a look. 

> Limit batch size for Merge Join based on memory
> -----------------------------------------------
>                 Key: DRILL-6123
>                 URL: https://issues.apache.org/jira/browse/DRILL-6123
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Execution - Flow
>    Affects Versions: 1.12.0
>            Reporter: Padma Penumarthy
>            Assignee: Padma Penumarthy
>            Priority: Major
>             Fix For: 1.13.0
> Merge join limits output batch size to 32K rows irrespective of row size. 
> This can create very large or very small batches (in terms of memory), 
> depending upon average row width. Change this to figure out output row count 
> based on memory specified with the new outputBatchSize option and average row 
> width of incoming left and right batches. Output row count will be minimum of 
> 1 and max of 64k. 

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