About Read-Only Oracle Homes

With Oracle Database 23ai, an Oracle home is available in read/write mode by default. However, you can choose to configure an Oracle home in read-only mode after you have performed a software-only Oracle Database installation.

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, all 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.