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Posted to github@arrow.apache.org by "yahoNanJing (via GitHub)" <gi...@apache.org> on 2023/04/03 01:59:16 UTC

[GitHub] [arrow-datafusion] yahoNanJing commented on pull request #5790: Revert pr #5020 (Parquet scan time metrics)

yahoNanJing commented on PR #5790:
URL: https://github.com/apache/arrow-datafusion/pull/5790#issuecomment-1493529835

   Thanks @alamb. My previous comment may be misleading. The main controversial is the metrics of **_time_elapsed_scanning_total_** contains the times cost by its parent operators, which may be misleading. By the above metrics, developers may think the bottleneck is the parquet scanning. However, it should be the aggregation whose time is wrongly counted in the metrics **_time_elapsed_scanning_total_**


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