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Posted to dev@drill.apache.org by "salim achouche (JIRA)" <ji...@apache.org> on 2018/02/09 17:36:00 UTC

[jira] [Created] (DRILL-6147) Limit batch size for Flat Parquet Reader

salim achouche created DRILL-6147:
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             Summary: Limit batch size for Flat Parquet Reader
                 Key: DRILL-6147
                 URL: https://issues.apache.org/jira/browse/DRILL-6147
             Project: Apache Drill
          Issue Type: Improvement
          Components: Storage - Parquet
            Reporter: salim achouche
            Assignee: salim achouche
             Fix For: 1.13.0


The Parquet reader currently uses a hard-coded batch size limit (32k rows) when creating scan batches; there is no parameter nor any logic for controlling the amount of memory used. This enhancement will allow Drill to take an extra input parameter to control direct memory usage.



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