How to Monitor PostgreSQL with Prometheus and Grafana on Ubuntu 22.04

In this tutorial, you'll set up Prometheus and Grafana Monitoring Platforms to monitor the PostgreSQL database server. You'll install and set up the postgres_exporter to gather PostgreSQL server matrics and expose them to the Prometheus server. At the end of this tutorial, you'll set up the dashboard monitoring for the PostgreSQL server via the Grafana data visualization platform.

Source: Howtoforge Linux Howtos und Tutorials