Metrics

The following table lists the telemetry metrics that the SDK emits. Configure a telemetry provider to make the metrics observable.

What metrics are emitted?
Metric name	Units	Type	Attributes	Description
smithy.client.call.duration	s	Histogram	rpc.service, rpc.method	Overall call duration (including retries)
smithy.client.call.attempts	{attempt}	MonotonicCounter	rpc.service, rpc.method	The number of attempts for an individual operation
smithy.client.call.errors	{error}	MonotonicCounter	rpc.service, rpc.method, exception.type	The number of errors for an operation
smithy.client.call.attempt_duration	s	Histogram	rpc.service, rpc.method	The time it takes to connect to the service, send the request, and get back HTTP status code and headers (including time queued waiting to be sent)
smithy.client.call.resolve_endpoint_duration	s	Histogram	rpc.service, rpc.method	The time it takes to resolve an endpoint (endpoint resolver, not DNS) for the request
smithy.client.call.serialization_duration	s	Histogram	rpc.service, rpc.method	The time it takes to serialize a message body
smithy.client.call.deserialization_duration	s	Histogram	rpc.service, rpc.method	The time it takes to deserialize a message body
smithy.client.call.auth.signing_duration	s	Histogram	rpc.service, rpc.method, auth.scheme_id	The time it takes to sign a request
smithy.client.call.auth.resolve_identity_duration	s	Histogram	rpc.service, rpc.method, auth.scheme_id	The time it takes to acquire an identity (such as AWS credentials or a bearer token) from an Identity Provider
smithy.client.http.connections.acquire_duration	s	Histogram		The time it takes a request to acquire a connection
smithy.client.http.connections.limit	{connection}	[Async]UpDownCounter		The maximum open connections allowed/configured for the HTTP client
smithy.client.http.connections.usage	{connection}	[Async]UpDownCounter	state: idle | acquired	Current state of connections pool
smithy.client.http.connections.uptime	s	Histogram		The amount of time a connection has been open
smithy.client.http.requests.usage	{request}	[Async]UpDownCounter	state: queued | in-flight	The current state of HTTP client request concurrency
smithy.client.http.requests.queued_duration	s	Histogram		The amount of time a request spent queued and waiting to be executed by the HTTP client
smithy.client.http.bytes_sent	By	MonotonicCounter	server.address	The total number of bytes sent by the HTTP client
smithy.client.http.bytes_received	By	MonotonicCounter	server.address	The total number of bytes received by the HTTP client

Following are the column descriptions:

• Metric name–The name of the emitted metric.

• Units–The unit of measure for the metric. Units are given in the UCUM case sensitive ("c/s") notation.

• Type–The type of instrument used to capture the metric.

• Description–A description of what the metric is measuring.

• Attributes–The set of attributes (dimensions) emitted with the metric.