metadata
title: Enable Prometheus metrics
description: Enable Prometheus metrics endpoint.
contentType: howto
Enable Prometheus metrics
To collect and expose metrics, n8n uses the prom-client{:target="_blank" .external-link} library.
The /metrics endpoint is disabled by default, but it's possible to enable it using the N8N_METRICS environment variable.
export N8N_METRICS=true
Refer to the respective Environment Variables (N8N_METRICS_INCLUDE_*) for configuring which metrics and labels should get exposed.
Both main and worker instances are able to expose metrics.
Queue metrics
To enable queue metrics, set the N8N_METRICS_INCLUDE_QUEUE_METRICS env var to true. You can adjust the refresh rate with N8N_METRICS_QUEUE_METRICS_INTERVAL.
Queue metrics are only available for the main instance in single-main mode.
# HELP n8n_scaling_mode_queue_jobs_active Current number of jobs being processed across all workers in scaling mode.
# TYPE n8n_scaling_mode_queue_jobs_active gauge
n8n_scaling_mode_queue_jobs_active 0
# HELP n8n_scaling_mode_queue_jobs_completed Total number of jobs completed across all workers in scaling mode since instance start.
# TYPE n8n_scaling_mode_queue_jobs_completed counter
n8n_scaling_mode_queue_jobs_completed 0
# HELP n8n_scaling_mode_queue_jobs_failed Total number of jobs failed across all workers in scaling mode since instance start.
# TYPE n8n_scaling_mode_queue_jobs_failed counter
n8n_scaling_mode_queue_jobs_failed 0
# HELP n8n_scaling_mode_queue_jobs_waiting Current number of enqueued jobs waiting for pickup in scaling mode.
# TYPE n8n_scaling_mode_queue_jobs_waiting gauge
n8n_scaling_mode_queue_jobs_waiting 0