Oracle PFILE: Get Started in Minutes（oraclepfile）

Oracle PFILE is an important tool when it comes to database administration. It allows DBAs to quickly and easily configure Oracle database parameters, and tune in a very short period of time, so it’s an essential tool for DBAs who need to get their databases up and running quickly and with minimal downtime.

Oracle PFILE is a text file that contains Oracle database parameter settings. It is used to initialise an Oracle instance each time it is started. This file is created by an Oracle DBA when they first create a database and they can edit it, just like a regular text file. This gives DBAs more flexibility and control over the database, as they are able to tweak some parameters to suit their needs.

Creating an Oracle PFILE is simple. All you need to do is to go to your Oracle database home directory and create a text file with the name of “init.ora”. This is where you will need to customise and include the Oracle database parameters that you need the database to use.

An example of an Oracle PFILE is listed below:

    *.audit_file_dest='X:\ORACLE_DB\RDBMS\AUDIT'
    *.audit_trail='NONE'
    *.compatible='11.2.0.3' 
    *.control_files='X:\ORACLE_DB\ORADATA\ORCL\control01.ctl','X:\ORACLE_DB\ORADATA\ORCL\control02.ctl','X:\ORACLE_DB\ORADATA\ORCL\control03.ctl'
    *.db_block_size=8192
    *.db_domain=''
    *.db_name='ORCL'
    *.diagnostic_dest='X:\ORACLE_DB'
    *.open_cursors=300 
    *.pga_aggregate_target=4G

This PFILE instructs Oracle to set audit_file_dest to “X:\ORACLE_DB\RDBMS\AUDIT” and so on. It also sets the database name to ORCL, as well as other database parameters.

Once you have created the Oracle PFILE, you will then need to create your database and startup the instance. To do this, you would use the following SQL command:

`SQL > CREATE DATABASE using pfile=’\init.ora`

The database will now be created using the settings you have configured in the Oracle PFILE.

In conclusion, using Oracle PFILE can be a quick and easy way to configure and tune Oracle databases. Even if you are not an experienced DBA, you can create and tweak a PFILE in minutes. Hopefully, this tutorial has provided you with an insight into what Oracle PFILE is and how to use it.