Add a Meter metric type?

[mumrah]

Would be cool to have a Meter type that just returned the rate of some counter.

Maybe something like:

@Monitor(name="hits", type=DataSourceType.METER, unit=TimeUnit.SECOND)

that would give you the rate of change of "hits" per second. Not sure what would be involved in doing this since I'm just getting started with Servo. But so far, I like it!

[brharrington]

See:

https://github.com/Netflix/servo/wiki#converting-counter-values-to-rates

The COUNTER type is intended to be used to indicate a monotonically increasing value that is just incremented when something happens. That can then be passed through a rate transform in the observers to get a rate per second. The other advantage of simple counters like this is that you can get accurate average rates for multiple different intervals.