[IMPALA-5972] Consider changing 'spill-buffer' explain output for partial sort

• Type: Improvement
• Status: Open
• Priority: Trivial
• Resolution: Unresolved
• Affects Version/s: Impala 2.10.0
• Component/s: Frontend
• Epic Color: ghx-label-6
• Assignee: Unassigned
• Reporter: Thomas Tauber-Marshall
• Created: 23/Sep/17 00:03
• Updated: 14/May/20 18:35

Description

The partial sort node doesn't actually spill, but its explain plan (at explain level 2) shows a value called 'spill-buffer', which is used to determine the page size allocated in the sorter.

This can be confusing, and we should consider other ways to name/display this value.