caoxuewen created SPARK-24978: --------------------------------- Summary: Add spark.sql.fast.hash.aggregate.row.max.capacity to configure the capacity of fast aggregation. Key: SPARK-24978 URL: https://issues.apache.org/jira/browse/SPARK-24978 Project: Spark Issue Type: Improvement Components: SQL Affects Versions: 2.4.0, 3.0.0 Reporter: caoxuewen
this pr add a configuration parameter to configure the capacity of fast aggregation. Performance comparison: /* Java HotSpot(TM) 64-Bit Server VM 1.8.0_60-b27 on Windows 7 6.1 Intel64 Family 6 Model 94 Stepping 3, GenuineIntel Aggregate w multiple keys: Best/Avg Time(ms) Rate(M/s) Per Row(ns) Relative ------------------------------------------------------------------------------------------------ fasthash = default 5612 / 5882 3.7 267.6 1.0X fasthash = config 3586 / 3595 5.8 171.0 1.6X */ -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org