[KUDU-2159] Add metric for upserts converted to updates

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.5.0
• Fix Version/s: 1.6.0
• Component/s: metrics, tablet
• Target Version/s: 1.6.0
• Code Review: https://gerrit.cloudera.org/#/c/8177/
• Assignee: William Berkeley
• Reporter: Todd Lipcon
• Created: 25/Sep/17 19:51
• Updated: 02/Oct/17 19:07
• Resolved: 02/Oct/17 19:07

Description

Currently we have a counter for upserts, but not a counter for how many of those upserts got converted into updates (vs being treated as inserts). This would be useful for better understanding workloads at a glance.