About Read-Only Oracle Homes

Understand how read-only Oracle homes work and how you can configure read-only Oracle homes. Learn about read-only Oracle home concepts like Oracle base home, Oracle base config, and orabasetab.

Starting with Oracle Database 18c, you can configure an Oracle home in read-only mode. A read-only Oracle home does not imply that the file system and the Oracle home is in read-only mode. The file system and mount point should always be in read/write mode.

A read-only Oracle home simplifies provisioning by implementing separation of installation and configuration.

In a read-only Oracle home, the configuration data and log files reside outside of the read-only Oracle home. See, File Path and Directory Changes in Read-Only Oracle Homes.

Apart from the traditional ORACLE_BASE and ORACLE_HOME directories, the following directories contain files that used to be in ORACLE_HOME:

• ORACLE_BASE_HOME
• ORACLE_BASE_CONFIG

Ensure that you enable read-only Oracle home before you create the database or listener.

When you run the roohctl script to enable a read-only Oracle home, the Oracle home file system will continue to be a read/write file system.

Note:

This feature does not affect how database administrators monitor, diagnose, and tune their system performance.