[HBASE-5533] Add more metrics to HBase

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.92.2, 0.94.0
• Fix Version/s: 0.94.0, 0.95.0
• Hadoop Flags: Reviewed
• Tags: 0.96notable
• Assignee: Shaneal Manek
• Reporter: Shaneal Manek
• Created: 06/Mar/12 18:25
• Updated: 15/Oct/13 04:46
• Resolved: 26/Mar/12 19:22

Description

To debug/monitor production clusters, there are some more metrics I wish I had available.

In particular:

• Although the average FS latencies are useful, a 'histogram' of recent latencies (90% of reads completed in under 100ms, 99% in under 200ms, etc) would be more useful
• Similar histograms of latencies on common operations (GET, PUT, DELETE) would be useful
• Counting the number of accesses to each region to detect hotspotting
• Exposing the current number of HLog files

Sub-Tasks

• decayingSampleTick1 prevents HBase from shutting down.: Closed