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Posted to issues@spark.apache.org by "Maxim Gekk (Jira)" <ji...@apache.org> on 2019/09/19 06:11:00 UTC

[jira] [Created] (SPARK-29171) Performance regression in Parquet MR on scans of 100 columns

Maxim Gekk created SPARK-29171:
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             Summary: Performance regression in Parquet MR on scans of 100 columns
                 Key: SPARK-29171
                 URL: https://issues.apache.org/jira/browse/SPARK-29171
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.0.0
            Reporter: Maxim Gekk


The updated benchmark results show performance regression more than 4 times in Parquet MR on scanning 100 columns, see https://github.com/apache/spark/pull/25828/files#diff-e37c3433287c7371ff9c2404db821095R248 . Need to find out the root cause of this and fix it.



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