Check manual page of postgres_connections

PostgreSQL: Connections

Included in	All Checkmk editions
Source Code License	Open Source
Supported Agents	Linux

This check allows you to monitor the amount of active and idle connections to a database. You can configure limits for the absolute connection count or percentual limits in respect to the maximum allowed active and idle connections. This check relies on data reported by the agent-side plug-in mk_postgres

Item

Name of the category and the name of the database

Discovery

One service is created for each database.