3 Configuring Oracle Database

This chapter describes how to configure Oracle Database for Oracle products. It contains the following sections:

3.1 Configuring Oracle Database for Additional Oracle Products

If you install additional Oracle products after the first installation, then use Oracle Database Configuration Assistant to configure your database for the new products as follows:

  1. If required, start the database.

  2. Run the following command to start Oracle Database Configuration Assistant:

    $ $ORACLE_HOME/bin/dbca
  3. Select Configure Database Options.

  4. From the list of available databases, select the database that you want to configure.

  5. Select the products that you want to enable, and then click Finish.

3.2 Using Configuration Assistants as Standalone Tools

Configuration assistants are usually run during an installation session, but you can also run them in standalone mode. As with Oracle Universal Installer, you can start each of the assistants noninteractively by using a response file.

This section contains the following topics:

3.2.1 Using Oracle Net Configuration Assistant

When Oracle Net Server or Oracle Net Client is installed, Oracle Universal Installer automatically starts Oracle Net Configuration Assistant.

If you choose to perform a separate Oracle Database Client installation, then Oracle Net Configuration Assistant automatically creates a configuration that is consistent with the selections made during the installation. Oracle Universal Installer automatically runs Oracle Net Configuration Assistant to set up a net service name in the local naming file located in the $ORACLE_HOME/network/admin directory of the client installation.

After installation is complete, you can use Oracle Net Configuration Assistant to create a more detailed configuration by entering the following command:

$ $ORACLE_HOME/bin/netca


When you use Oracle Database Configuration Assistant to create a database, it automatically updates the network configuration files to include information for the new database.

3.2.2 Using Oracle Database Upgrade Assistant

During an Oracle Database installation, you can choose to upgrade a database from an earlier release to the current release. However, if you choose not to upgrade a database during installation or if there is more than one database that you want to upgrade, then you can run Oracle Database Upgrade Assistant after the installation.

If you installed Oracle Database and chose not to upgrade the database during the installation, then you must upgrade the database before mounting it.

To start Oracle Database Upgrade Assistant, run the following command:

$ $ORACLE_HOME/bin/dbua

For information about the command-line options available with Oracle Database Upgrade Assistant, use the -help or -h command-line arguments as follows:

$ $ORACLE_HOME/bin/dbua -help

See Also:

Oracle Database Installation Guide and Oracle Database Upgrade Guide for more information about upgrades

3.2.3 Using Oracle Database Configuration Assistant

You can use Oracle Database Configuration Assistant to:

  • Create a default or customized database

  • Configure an existing database to use Oracle products

  • Create Automatic Storage Management disk groups

  • Generate a set of shell and SQL scripts that you can inspect, modify, and run at a later time to create a database

To start Oracle Database Configuration Assistant, run the following command:

$ $ORACLE_HOME/bin/dbca

For information about the command-line options available with Oracle Database Configuration Assistant, use the -help or -h command-line arguments as follows:

$ $ORACLE_HOME/bin/dbca -help

3.2.4 Configuring New or Upgraded Databases

Oracle recommends that you run the utlrp.sql script after creating or upgrading a database. This script recompiles all PL/SQL modules that may be in an invalid state, including packages, procedures, and types. This is an optional step but Oracle recommends that you do it when you create the database and not at a later date.

To run the utlrp.sql script:

  1. Switch user to oracle.

  2. Use the oraenv or coraenv script to set the environment for the database on which you want to run the utlrp.sql script:

    • Bourne, Bash, or Korn shell:

      $ . /usr/local/bin/oraenv
    • C shell:

      % source /usr/local/bin/coraenv

    When prompted, specify the SID for the database.

  3. Run the following command to start SQL*Plus:

    $ sqlplus "/ AS SYSDBA"
  4. If required, run the following command to start the database:

  5. Run the utlrp.sql script:

    SQL> @?/rdbms/admin/utlrp.sql

3.3 Relinking Executables

You can relink your product executables manually by using the relink shell script located in the $ORACLE_HOME/bin directory. You must relink the product executables every time you apply an operating system patch or after an operating system upgrade.


Before relinking executables, you must shut down all executables that are running in the Oracle home directory that you are relinking. In addition, shut down applications linked with Oracle shared libraries.

Depending on the products that have been installed in the Oracle home directory, the relink script relinks Oracle product executables.

To relink product executables, run the following command:

$ relink argument

In this command, argument is one of the values listed in Table 3-1.

Table 3-1 Relink Script Arguments

Argument Description


Every product executable that has been installed


Oracle Database executable only


net_client, net_server, cman


net_client, plsql


Client shared library




Oracle Text utilities


All precompilers that have been installed


All utilities that have been installed



Note: To give the correct permissions to the nmo and nmb executables, you must run the root.sh script after relinking oemagent.


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