[IMPALA-7689] Improve size estimate for incremental stats

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 3.1.0
• Fix Version/s: Impala 3.1.0
• Component/s: Catalog
• Epic Color: ghx-label-5
• Assignee: Bharath Vissapragada
• Reporter: Vuk Ercegovac
• Created: 10/Oct/18 15:58
• Updated: 19/Oct/18 17:19
• Resolved: 19/Oct/18 17:19

Description

After compressing incremental stats, their size estimate is not too conservative. We use that size estimate to block the functionality (see the corresponding expr in analysis and serialization in catalogd), so without adjusting the estimate, the functionality will be blocked unnecessarily.