[HBASE-15519] Add per-user metrics

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.2.0
• Fix Version/s: 2.3.0, 3.0.0-alpha-3
• Component/s: metrics
• Hadoop Flags: Reviewed
• Release Note: Adds per-user metrics for reads/writes to each RegionServer. These metrics are exported by default. hbase.regionserver.user.metrics.enabled can be used to disable the feature if desired for any reason.
• Assignee: Ankit Singhal
• Reporter: Enis Soztutar
• Created: 22/Mar/16 18:53
• Updated: 17/Jun/22 05:35
• Resolved: 11/Jun/22 18:17

Description

Per-user metrics will be useful in multi-tenant cases where we can emit number of requests, operations, num RPCs etc at the per-user aggregate level per regionserver. We currently have throttles per user, but no way to monitor resource usage per-user.

Looking at these metrics, operators can adjust throttles, do capacity planning, etc per-user.

Issue Links

• breaks: HBASE-23364 HRegionServer sometimes does not shut down.
• is depended upon by: HBASE-11062 hbtop
• is related to: HBASE-24767 Change default to false for HBASE-15519 per-user metrics
• is related to: HBASE-23210 Backport HBASE-15519 (Add per-user metrics) to branch-1
• links to: GitHub Pull Request #661
• links to: GitHub Pull Request #766
• links to: GitHub Pull Request #1143