This is a Ruby version of performance metrics inspired by metrics developed by Coda Hale at Yammer. Currently this is under heavy development -- it needs Gem packaging, more features, validation of metrics, more functional testing, and a little better test coverage. Pull requests happily accepted, please include docs and tests where possible!

Right now, I have:

• Counters
• Meters
• Gauges

Upcoming:

• Histograms
• Timers

The goal of ruby-metrics is to get up and running quickly. You start an agent, register some instruments, and they're exported over HTTP via JSON. For example, getting started with a counter would look like this:

@metrics = Metrics::Agent.new()
@metrics.start

counter = @metrics.add_instrument('counter', 'my_counter')
counter.inc(1)
counter.inc(1)

Then, hitting localhost:8081/status would yield:

{"my_counter":"2"}