[HBASE-19285] Add per-table latency histograms

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 1.4.0, 1.3.2, 2.0.0
• Component/s: metrics
• Hadoop Flags: Reviewed

Release Note

Per-RegionServer table latency histograms have been returned to HBase (after being removed due to impacting performance). These metrics are exposed via a new JMX bean "TableLatencies" with the typical naming conventions: namespace, table, and histogram component.

• Assignee: Josh Elser
• Reporter: Clay B.
• Created: 16/Nov/17 16:27
• Updated: 01/Aug/18 06:21
• Resolved: 01/Dec/17 22:54

Description

HBASE-17017 removed the per-region latency histograms (e.g. Get, Put, Scan at p75, p85, etc)

HBASE-15518 added some per-table metrics, but not the latency histograms.

Given the previous conversations, it seems like it these per-table aggregations weren't intentionally omitted, just never re-implemented after the per-region removal. They're some really nice out-of-the-box metrics we can provide to our users/admins as long as it's not detrimental.