codahale/metrics — pull request #452 by rohan25 (2013-08-12 20:56:01+00:00)
Title: New metric 'utilization-max' to track thread usage out of max pool size

The metric 'utilization' measures the current busy threads out of the current size of the pool. When this gets too high, the pool will grow (up to a max size). This new metric measures the busy threads out of the maximum size of the pool to determine when there may not be enough threads to service requests.