Support throughput measurement of the collector

[chenlujjj]

Component(s)

No response

Is your feature request related to a problem? Please describe.

We'd like to be aware of the throughput of the logs/metrics/traces passing through the collector, like what https://github.com/observIQ/bindplane-otel-collector/tree/main/processor/throughputmeasurementprocessor provides.

Now otel-collector itself exposes metrics counting the number of signals, but not data size of signals yet.

Describe the solution you'd like

Introduce https://github.com/observIQ/bindplane-otel-collector/tree/main/processor/throughputmeasurementprocessor into the repo, bindplane-specific logic can be removed.

Describe alternatives you've considered

No response

Additional context

No response

[VihasMakwana]

I think the work is already in progress in opentelemetry-collector repo. Here's the RFC for it. I think the metric you're looking for is otelcol.*.produced.size

[VihasMakwana]

I think this can be enabled with level: detailed. Can anyone from @open-telemetry/collector-maintainers @open-telemetry/collector-contrib-maintainers confirm?

service:
  telemetry:
    metrics:
      level: detailed

[chenlujjj]

Thanks @VihasMakwana ,I'll have a try of the detailed level metrics.