Prometheus metrics

Metric	Description	Type	Labels	Policy
apicast_status	Number of response status send by APIcast to client	counter	status	Default
nginx_http_connections	Number of HTTP connections	gauge	state(accepted,active,handled,reading,total,waiting,writing)	Default
nginx_error_log	APIcast errors	counter	level(debug,info,notice,warn,error,crit,alert,emerg)	Default
openresty_shdict_capacity	Capacity of the dictionaries shared between workers	gauge	dict(one for every dictionary)	Default
openresty_shdict_free_space	Free space of the dictionaries shared between workers	gauge	dict(one for every dictionary)	Default
nginx_metric_errors_total	Number of errors of the Lua library that manages the metrics	counter	-	Default
total_response_time_seconds	Time needed to sent a response to the client (in seconds)	histogram	service_id, service_system_name	Default
upstream_response_time_seconds	Response times from upstream servers (in seconds)	histogram	service_id, service_system_name	Default
upstream_status	HTTP status from upstream servers	counter	status, service_id, service_system_name	Default
worker_process	Number of times that a worker process has been started.	counter	-	Default
threescale_backend_calls	Authorize and report requests to the 3scale backend (Apisonator)	counter	endpoint(authrep, auth, report), status(2xx, 4xx, 5xx)	APIcast
batching_policy_auths_cache_hits	Hits in the auths cache of the 3scale batching policy	counter	-	3scale Batcher
batching_policy_auths_cache_misses	Misses in the auths cache of the 3scale batching policy	counter	-	3scale Batcher
content_caching	Number of requests that go through content caching policy.	counter	status(MISS, BYPASS, EXPIRED, STALE, UPDATING, REVALIDATED, HIT)	Content Caching