[IMPALA-7622] Add query profile metrics for RPC's used when pulling 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: Frontend
• Epic Color: ghx-label-7
• Assignee: Vuk Ercegovac
• Reporter: Vuk Ercegovac
• Created: 25/Sep/18 21:27
• Updated: 13/Oct/18 03:27
• Resolved: 13/Oct/18 00:04

Description

When --pull_incremental_statistics is enabled, the frontend will fetch these stats from catalogd. We should record metrics for this, such as number partitions fetched, size of received bytes, and elapsed time.