The parameter file is the main location for defining parameter values for the PostgreSQL server. All the parameters can be set in the parameter file, which is known as
There are also two other parameter files:
pg_ident.conf. Both of these relate to connections and security, so we'll cover them in the appropriate chapters that follow.
postgresql.conf, as described earlier.
Some of the parameters take effect only when the server is first started. A typical example might be
shared_buffers, which defines the size of the shared memory cache.
Many of the parameters can be changed while the server is still running. After changing the required parameters, ...