Using Metrics in a gRPC Application

Metrics allow us to monitor the health of the application and detect various trends in its usage. Metrics are similar to logging. However, while logging is responsible for producing relatively detailed human-readable messages, metrics represent relatively simple data, such as counters and durations. This data can then be visualized on a time-series graph, such as the one below.

With gRPC in particular, here are some examples of the metrics we can collect:

• The number of successful gRPC calls

• The number of failed gRPC calls

• Call durations

• The counts of ...