Const ExperimentalFor successful collections, error.type MUST NOT be set. For failed collections, error.type SHOULD contain the failure cause.
It can happen that metrics collection is successful for some MetricProducers, while others fail. In that case error.type SHOULD be set to any of the failure causes.
This metric is experimental and is subject to breaking changes in minor releases of @opentelemetry/semantic-conventions.
The duration of the collect operation of the metric reader.