boundary/folsom — pull request #27 by russelldb (2012-07-02 16:35:21+00:00)
Title: Add a 'spiral' one minute sliding window count/meter

Riak metrics used a sliding one minute count and a total count for a bunch of metrics. The folsom meter's EWMA sample doesn't show the actual count of events in the last minute, wish Riak users expect, this module duplicates the behaviour of riak module 'spiraltime.erl' by maintaining a sliding window count for the last minute and a total since the metric started.