[HBASE-24824] Add more stats in PE for read replica

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.3.1
• Fix Version/s: 3.0.0-alpha-1, 2.3.1, 2.4.0
• Component/s: PE, read replicas
• Assignee: Huaxiang Sun
• Reporter: Huaxiang Sun
• Created: 05/Aug/20 21:03
• Updated: 11/Aug/20 16:50
• Resolved: 10/Aug/20 16:59

Description

Add more stats for read replica PE test. Currently, there is read replica tests in PE, but it does not provide details for how many requests to replica regions, and how many replica results win.

Also, want to add a latency histogram for replica reads.

Issue Links

• Is contained by: HBASE-24554 Improve/stable read replica
• links to: GitHub Pull Request #2205
• links to: GitHub Pull Request #2212
• links to: GitHub Pull Request #2213