
"This is the resource that engineers turn to in the study of radiation detection. The fourth edition takes into account the technical developments that continue to enhance the instruments and techniques available for the detection and spectroscopy of ionizing radiation. New coverage is presented on ROC curves, micropattern gas detectors, new sensors for scintillation light, and the excess noise factor. Revised discussions are also included on TLDs and cryogenic spectrometers, radiation backgrounds, and the VME standard. Engineers will gain a strong understanding of the field with this updated book."
Radiation Detection and Measurement by Knoll is our bible.
It's a metric for a source - not a receiver. So if we're going to use Becquerels, then we're really talking about needing to characterize the sources making the requests, not the servers receiving them. Which is great information to characterize, but still leaves us needing a metric for counting the requests seen vs those that are started but never reach the server.
If we're still excited about doing things like people measuring radiation, then we could use counts per time unit. Like, counts per second, for example.
BUT - not all requests are equal. Next up, we measure how many resources are consumed in serving each request. I expect my next system dashboard to have a metric for RES (Röntgen Equivalent Server).
[1] Knoll, 'Radiation Detection and Measurement' (3rd Ed) p2.