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Don Burleson Blog 







Add a new instance to a server tips

Expert Oracle Database Tips by Donald BurlesonAugust 26, 2015

Question:  In want to add a new instance to my Solaris server, and I don't know how to add a new $ORACLE_HOME to my existing database.  I also need to know how to add a new instance on Linux.

Answer:  Start b y reviewing these important notes on Oracle instance consolidation, as shops worldwide are recognizing the advantages of running dozens of instances on a single monolithic server where it's easy to share computing resources.  Also see my notes on adding a new instance to a RAC database server.

Here are the basic steps for installing a new instance on your server:

1 - If you are adding an instance on a different release, run DBCA and install the new Oracle software in another $ORACLE_HOME directory under your existing $ORACLE_BASE directory.

2 - Create a new pfile, making sure that you size the SGA and PGA to allow enough room for the other instances on the server.

2 - Now make your oratab file.  In Solaris, make an entry in /var/opt/oratab for the new instance.  In Linux, HP/UX and AIX, make the entry in /etc/oratab.

3 - Change your .profile (or .login) depending on your shell to allow you to specify the new environment.

4 - You are now ready to change your environment to point to your new $ORACLE_HOME.

5 - Next, backup controlfile to trace from an existing database to generate a set of "create database syntax.  Beginners can get the create database syntax by running DBCA to create a new database under your new $ORACLE_HOME.

6 - Now populate your new data dictionary by running $ORACLE_HOME/rdbms/admin/catalog.sql

6 - Finally, start and populate your new instance with tables and indexes.

Also see how to remove an instance from an Oracle server.

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