Rails + New Relic: What does RPM mean?

The product name "RPM" stands for "Rails Performance Management" - which is an anachronism, now that we support Ruby, Java, PHP and .NET (stay tuned for other languages).

The suffix "rpm" stands for "Requests per Minute". Typically used to measure throughput, either for the whole application, or a specific Web Transaction (Controller Action in Rails).

Lew Cirne
Founder and CEO
New Relic

I believe Throughput:RPM means the number of http "Requests per minute" being handled by your web application/application container. This would give you an idea of the volume of requests moving through the app and therefore context to understand how well various pieces or components of your app are handling that load on the App.

Hope that helps.