xuanzhiang created SPARK-42227:
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Summary: Use approx_percentile function running slower in spark3
than spark2
Key: SPARK-42227
URL: https://issues.apache.org/jira/browse/SPARK-42227
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 3.2.1
Reporter: xuanzhiang
approx_percentile(end_ts-start_ts,0.9) cost_p90
in spark3 , it use objectHashAggregate method , but it shuffle very slow. when
i use percentile , it become fast. i dont know the reson, i think
approx_percentile should fast.
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