[PHOENIX-5358] Metrics for the GlobalIndexChecker coprocessor

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Resolved
• Affects Version/s: 4.13.1, 5.0.0, 4.15.0, 4.14.2
• Fix Version/s: 4.15.0, 5.1.0, 4.14.3
• Assignee: Priyank Porwal
• Reporter: Kadir OZDEMIR
• Created: 19/Jun/19 20:28
• Updated: 27/Aug/19 19:03
• Resolved: 19/Jul/19 16:38

Description

The GlobalIndexChecker coprocessor is responsible for checking if an index row is "verified", that is, has completed its most recent two-phase write operation, during scans.  If the row is not verified then the coprocessor rebuilds the row using a read-repair technique. The read-repair operations should be rare but add extra latency on the scan operations. We need to know how many read-repair operations happen and how long they take. Thus, we need metrics on them.

Issue Links

• links to: GitHub Pull Request #535