Xiangrui Meng created SPARK-8695: ------------------------------------ Summary: TreeAggregation shouldn't be triggered for 5 partitions Key: SPARK-8695 URL: https://issues.apache.org/jira/browse/SPARK-8695 Project: Spark Issue Type: Improvement Components: MLlib, Spark Core Affects Versions: 1.5.0 Reporter: Xiangrui Meng Assignee: Xiangrui Meng
If an RDD has 5 partitions, tree aggregation doesn't reduce the wall-clock time. Instead, it introduces scheduling and shuffling overhead. We should update the condition to use tree aggregation (code attached): {code} while (numPartitions > scale + numPartitions / scale) { {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org