[CASSANDRA-2232] Clean up and document EstimatedHistogram

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 0.7.3
• Assignee: Jonathan Ellis
• Reporter: Jonathan Ellis

Authors

Jonathan Ellis

Reviewers

Brandon Williams

• Created: 23/Feb/11 23:22
• Updated: 16/Apr/19 09:33
• Resolved: 24/Feb/11 21:15

Description

EstimatedHistogram treats adding value n as adding a value infinitesimally greater than n. This barely made sense for the original goal of latency tracking but is clearly broken for inherently integral data like sstables-per-read.

Also, median() is broken, but even a non-broken median() would not be correct to use in mean row size reporting which is its only caller.