[SPARK-35529] Add fallback metrics for hash aggregate

• Type: Documentation
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 3.2.0
• Fix Version/s: 3.2.0
• Component/s: SQL
• Assignee: Cheng Su
• Reporter: Cheng Su
• Created: 26/May/21 06:20
• Updated: 26/May/21 11:28
• Resolved: 26/May/21 11:28

Description

Add the metrics to record how many tasks fallback to sort-based aggregation for hash aggregation. This will help developers and users to debug and optimize query.

Issue Links

• links to: [Github] Pull Request #32671 (c21)