# List of Prometheus Metrics | Type | Name | Description | | --------- | ----------------------------------------- | -------------------------------------------------------- | | gauge | jupyterhub_active_users | Number of users who were active in the given time period | | histogram | jupyterhub_check_routes_duration_seconds | Time taken to validate all routes in proxy | | histogram | jupyterhub_event_loop_interval_seconds | Distribution of measured event loop intervals | | histogram | jupyterhub_hub_startup_duration_seconds | Time taken for Hub to start | | histogram | jupyterhub_init_spawners_duration_seconds | Time taken for spawners to initialize | | histogram | jupyterhub_proxy_add_duration_seconds | Duration for adding user routes to proxy | | histogram | jupyterhub_proxy_delete_duration_seconds | Duration for deleting user routes from proxy | | histogram | jupyterhub_proxy_poll_duration_seconds | Duration for polling all routes from proxy | | histogram | jupyterhub_request_duration_seconds | Request duration for all HTTP requests | | gauge | jupyterhub_running_servers | The number of user servers currently running | | histogram | jupyterhub_server_poll_duration_seconds | Time taken to poll if server is running | | histogram | jupyterhub_server_spawn_duration_seconds | Time taken for server spawning operation | | histogram | jupyterhub_server_stop_seconds | Time taken for server stopping operation | | gauge | jupyterhub_total_users | Total number of users |