Service metrics

Every Knative Service has a proxy container that proxies the connections to the application container. A number of metrics are reported for the queue proxy performance.

Using the following metrics, you can measure if requests are queued at the proxy side (need for backpressure) and what is the actual delay in serving requests at the application side.

Queue proxy metrics

Requests endpoint.

Metric Name	Description	Type	Tags	Unit	Status
revision_request_count	The number of requests that are routed to queue-proxy	Counter	configuration_name container_name namespace_name pod_name response_code response_code_class revision_name service_name	Dimensionless	Stable
revision_request_latencies	The response time in millisecond	Histogram	configuration_name container_name namespace_name pod_name response_code response_code_class revision_name service_name	Milliseconds	Stable
revision_app_request_count	The number of requests that are routed to user-container	Counter	configuration_name container_name namespace_name pod_name response_code response_code_class revision_name service_name	Dimensionless	Stable
revision_app_request_latencies	The response time in millisecond	Histogram	configuration_name namespace_name pod_name response_code response_code_class revision_name service_name	Milliseconds	Stable
revision_queue_depth	The current number of items in the serving and waiting queue, or not reported if unlimited concurrency	Gauge	configuration_name event-display container_name namespace_name pod_name response_code_class revision_name service_name	Dimensionless	Stable