What configuration files do you know for PostgreSQL and what are they used for?

The main configuration files in PostgreSQL are:

• postgresql.conf — the main server configuration file, where parameters such as memory settings, logging, parallelism, network connections, etc., are set.

• pg_hba.conf — access control file, where authentication and authorization rules for clients based on IP, users, and connection methods are configured.

• pg_ident.conf — file for mapping system users to PostgreSQL roles, used for setting up mapping during authentication.

For example, to allow connections only from a specific IP and set the authentication method, you need to edit pg_hba.conf. To change performance parameters — postgresql.conf.