Process Server is the Secure Agent service that executes Application Integration processes, connectors, and connections.
When you deploy Application Integration assets to the Secure Agent, you deploy them to Process Server. When you run an asset, Process Server executes it.
The PostgreSQL database comes with the Process Server service of the Secure Agent and stores the metadata that Process Server collects and generates.
Find the PostgreSQL directory in the following location on your system:
Informatica includes a PostgreSQL database with the Process Server package. However, you can also connect a different PostgreSQL database version to the Process Server. You can also migrate the existing cluster database dump to the PostgreSQL database. For more information, see Configure in the How-To library section on the documentation portal.