Change parameter instance_name after standby database has been activated

Question

Hello ,
our primary database is configured as follows:
SQL> show parameter db_name;
NAME                                 TYPE        VALUE
db_name                              string      prod01
SQL> show parameter instance_name
NAME                                 TYPE        VALUE
instance_name                        string      prod01
the corresponding standby database is configured as:
SQL> show parameter db_name;
NAME                                 TYPE        VALUE
db_name                              string      prod01
SQL> show parameter instance_name
NAME                                 TYPE        VALUE
instance_name                        string      stbyprod01
Now the standby database shall be activated. Afterwards I want to change the parameter INSTANCE_NAME from stbyprod01 to prod01.
The question now is: what needs to be done to change the parameter INSTANCE_NAME? As a matter of fact the standby database will
already be activated and be treated and handled as a standalone database. The former primary database will  not be used anymore.
I would proceed as follows:
SQL> create pfile='initprod01.ora' from spfile;
SQL> shutdown immediate;
oracle #> edit the pfile and change the parameter INSTANCE_NAME from stbyprod01 to prod01
SQL> startup;
SQL> create spfile='spfileprod01.ora' from pfile;
SQL> shutdown immediate;
SQL> startup;
That should be all - from my point of view (I know that LISTENER.ORA and TNSNAMES.ORA should be modified, too).
If anybody has already experiences with changing the INSTANCE_NAME parameter but sees some further configurations: please just let me know!
Rgds
Jan

Answer 1

Hi ,
only "alter system set instance_name='TEST' scope=spfile" will work since the parameter INSTANCE_NAME is static. After restarting the database/instance the statement "show parameter instance_name" will show the new instance name.
But when selecting the view V$INSTANCE the value of the column INSTANCE_NAME has still the old value. Any idea why this value remains unchanged in the view V$INSTANCE?
Rgds
Jan