[HBASE-12133] Add FastLongHistogram for metric computation

• Type: New Feature
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.98.8
• Fix Version/s: 0.99.1, 1.3.0
• Component/s: metrics
• Labels: histogram metrics
• Hadoop Flags: Reviewed
• Release Note: Adds Histogram and AtomicLong Utils
• Assignee: Yi Deng
• Reporter: Yi Deng
• Created: 01/Oct/14 04:37
• Updated: 12/Mar/19 02:09
• Resolved: 02/Oct/14 17:40

Description

FastLongHistogram is a thread-safe class that estimate distribution of data and computes the quantiles. It's useful for computing aggregated metrics like P99/P95.

Issue Links

• is required by: HBASE-15222 Use less contended classes for metrics