View Source Telemetry

ConnGRPC sends telemetry events.

Call :telemetry.attach/4 or :telemetry.attach_many/4 to attach your handler function to any of the following events:

channel-events
Channel events

[:conn_grpc, :channel, :get]: reports the duration of the call to ConnGRPC.Channel.get/1. If it's taking too long, the channel process is overwhelmed with messages, and increasing pool size may help.
[:conn_grpc, :channel, :connected]: reports a successful connection, and how long it took to establish the connection
[:conn_grpc, :channel, :connection_failed]: reports a failed connection, and how long it took trying to establish the connection
[:conn_grpc, :channel, :disconnected]: reports a disconnection, and how long the connection stayed up

[:conn_grpc, :pool, :get_channel]: reports the duration of the call to ConnGRPC.Pool.get_channel/1.
[:conn_grpc, :pool, :status]: reports the pool status, with the expected size (fixed pool size) and current size (amount of channels currently on the pool). This event is reported periodically.