Is Oracle using Pfile or Spfile?

By default, if you do not specify PFILE in your STARTUP command, Oracle will use server parameter file (SPFILE). If you choose to use the traditional text initialization parameter file (PFILE), you must specify the PFILE clause when issuing the STARTUP command.

What is the difference between spfile and pfile?

While a PFILE can be edited with any text editor, the SPFILE is a binary file. The “ALTER SYSTEM SET” and “ALTER SYSTEM RESET” commands can be used to change parameter values in an SPFILE.

How do I know if my database is running with Pfile or Spfile?

Select * from v$spparameter;(to check the Spfile). Select * from v$parameter(to check the pfile). If any Path available in Value column. DB is running in SPFile, else Pfile.

How do I start an Oracle instance with Spfile?

To start an instance, the database must read instance configuration parameters (the initialization parameters) from either a server parameter file ( SPFILE ) or a text initialization parameter file (PFILE)….About Initialization Parameter Files and Startup

  1. spfile ORACLE_SID . ora.
  2. spfile. ora.
  3. init ORACLE_SID . ora.

Why do we create pfile from Spfile?

Creating a text parameter file is a convenient way to get a listing of the current parameter settings being used by the database, and it lets you edit the file easily in a text editor and then convert it back into a server parameter file using the CREATE SPFILE statement.

Where is Pfile located in Oracle?

PFILE. A PFILE is a traditional text based init. ora parameter file. Typically this resides on the server in the $ORACLE_BASE/admin/SID/pfile directory, with a symbolic link pointing to it from the $ORACLE_HOME/dbs directory.

What is the use of Pfile and Spfile?

SPFILE is a binary file that contains the same information as the old PFILE. SPFILE permits dynamic changes without requiring you to restart that instance. By default, if you do not specify PFILE in your STARTUP command, Oracle will use server parameter file (SPFILE).

How do I change my Spfile to Pfile?

If you already have a SPFILE, a PFILE can be generated from it using one of the following. CREATE PFILE FROM SPFILE; CREATE PFILE FROM SPFILE = ‘production. ora’; CREATE PFILE = ‘$ORACLE_HOME/dbs/my_pfile. ora’ FROM SPFILE; CREATE PFILE = ‘$ORACLE_HOME/dbs/my_pfile.

Where can I find Pfile in Oracle?

By default, PFILE is located in $ORACLE_HOME/dbs .

How do I start using Pfile?

Create the new spfile from the pfile (it is created in the default location). SQL> CREATE SPFILE FROM PFILE=’d:init. ora’; File created. Restart the database to start using the newly created spfile.

Can a Pfile be created from a Spfile?

A PFILE is necessary in order to create a SPFILE to enable persistent initialization parameters. If you already have a SPFILE, a PFILE can be generated from it using one of the following. CREATE PFILE FROM SPFILE; CREATE PFILE FROM SPFILE = ‘production. ora’; CREATE PFILE = ‘$ORACLE_HOME/dbs/my_pfile.

Can we create pfile from Spfile or vice versa when the database is down?

Yes you can create a pfile from an spfile file…and vice versa when instance is down. This does allow you modified fields and get them back into the spfile quickly and easily. Yes It is fine.