Oracle Database - Parameter Files

Parameter files contain a list of configuration parameters for that instance and database. Both parameter files (pfiles) and server parameter files (spfiles) let you store and manage your initialization parameters persistently in a server-side disk file.

A server parameter file has these additional advantages:

• The file is concurrently updated when some parameter values are changed in the active instance.
• The file is centrally located for access by all instance in a Real Application Services database.