All metric names must begin with a letter, an underscore, or a colon. No metric names may begin with
Beyond the first character, metric names may contain any of the following characters:
If metric names don’t follow these requirements, they will be rejected.
Lightstep Observability supports gauges and two types of counters - deltas and cumulative, known as their kind. If when first ingested a metric name doesn’t match the kind recorded, it will be rejected and an error will be sent back to the client.
There are currently no restrictions on attribute keys or values.