Monitoring PostgreSQL databases can be easily achieved using Telegraf, an open-source monitoring tool, in conjunction with InfluxDB, a time-series database. This tutorial guides users through setting up Telegraf and InfluxDB to monitor PostgreSQL performance and throughput by leveraging the statistics collector that automatically gathers metrics about database activity. The process involves editing the Telegraf configuration file to specify the address of the PostgreSQL server, connection parameters, and other settings as needed. Upon restarting Telegraf and Chronograf, users can view the collected metrics in the InfluxDB data explorer or query them using the CLI. This setup allows for easy monitoring of PostgreSQL databases in production, enabling users to track key performance indicators such as database activity, disk usage, and connection times.