Profile Files
During installation, three profiles are created in the file system:
· DEFAULT.PFL
· START_<Instance>
· <SID>_<Instance>
These profiles contain the parameters that determine the operating system resource usage of the instance, for example, the number of work processes, the buffer sizes.
You import and activate these profiles using the profile maintenance tool.
After that, you should simply maintain and activate the profiles using the profile maintenance.

You can only check the profile values if the profiles have been maintained using the profile maintenance tool.
See also: