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

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

Another way to find would be set the parameter with scope=spfile, if database was started with spfile one will be able to set the value if it’s started with pfile you will see the “ORA-32001: write to spfile requested but no SPFILE specified at startup”.

How do I change the Spfile parameter when an instance is down?

In order to modify the spfile in oracle database, do one of the following:

1. Use the ALTER SYSTEM command to modify the SPFILE currently in use. To determine if an spfile is being used: SQL> select value from v$parameter where name=’spfile’
2. Use the export method. Export the SPFILE to a PFILE.

What happen if you lose your Spfile and Pfile and your DB crashed with some error How will you start database?

Both spfile, as well as pfile, is lost or corrupted and your database is down. 1. In that case, you have remaining option to create new pfile using the non-default parameters recorded in the alert. You can then start the database using this pfile (init.

What is Pfile and Spfile in Oracle database?

PFILE stands for the parameter file. It is a text file which can be modified by a text editor. With the help, PFILE Oracle server start an Oracle Instance. What is SPFILE? SPFILE stands for the server parameter file.

Is Oracle using Spfile?

In Oracle9i, Oracle has also introduced the ‘SPFILE’, which is a binary file stored on the database Server. Changes which are applied to the instance parameters may be persistent across all startup/shutdown procedures. Starting Oracle9i, you can startup the instance using either a spfile or an init. ora file.

Which initialization parameter file is used to start the instance?

Execute the following query to see if your database was started with a PFILE or SPFILE: SQL> SELECT DECODE(value, NULL, ‘PFILE’, ‘SPFILE’) “Init File Type” FROM sys. v_$parameter WHERE name = ‘spfile’;

Can we edit Spfile in Oracle?

Actually the only way to edit a SPFILE is through an online database.

How do I change my Pfile Spfile?

The SPFILE is different from the PFILE in that it can not be directly edited. This is because it has a header and footer that contains binary values. Since you can not change a SPFILE directly, Oracle allows you to manage the SPFILE via the alter system command. Also see this spfile example.

How can you recover from a lost Pfile and Spfile?

If your server parameter file is lost or corrupted, then the current instance, or the next attempt at starting the database instance may fail. One way to recover SPFILE is to create the text initialization parameter file (PFILE) from the parameter value listings in the alert log, and then create SPFILE from the PFILE.

How to create a spfile from a pfile?

SQL> connect sys/a as sysdba Connected. SQL> shutdown Database closed. Database dismounted. ORACLE instance shut down. SQL> create spfile from pfile; create spfile from pfile * ERROR at line 1: ORA-01078: failure in processing system parameters LRM-00110: syntax error at ” SQL> show parameter spfile; ORA-01034: ORACLE not available SQL> spool off

How to create a spfile parameter in SQL?

ORACLE instance shut down. SQL> create spfile from pfile; create spfile from pfile * ERROR at line 1: ORA-01078: failure in processing system parameters LRM-00110: syntax error at ” SQL> show parameter spfile; ORA-01034: ORACLE not available SQL> spool off check your init.ora parameters, sounds like something is formatted improperly.

Is there an init.ora file for a spfile?

If using an spfile, there is no init.ora file (pfile) necessarily. You would create one in order to startup. I was offering the following way of working around having to re-create the init.ora file starting the database, then re-creating the spfile.

What happens if you change the dynamic parameter of the spfile?

Now if you shutdown the database and start the database, it fails as SPFILE has invalid value for the changed dynamic parameter. You can’t edit the SPFILE and can’t create the init.ora file. This requires DBA to create pfile everytime you start the database so that you have a good working copy of init.ora file.