[KYLIN-2779] Segment size estimation is wrong for bitmap measure

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: v2.0.0
• Labels: scope
• Assignee: Alexander Sterligov
• Reporter: Alexander Sterligov
• Created: 08/Aug/17 09:27
• Updated: 02/Mar/20 15:04
• Resolved: 02/Mar/20 15:04

Description

If bitmap is used for distinct count, then size estimation is wrong for about 4 times.

The problem is fixed by kylin.cube.size-estimate-countdistinct-ratio=0.2.