About Read-Only Oracle Homes
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, 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:
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ORACLE_BASE_HOME
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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.Parent topic: Evolution of Oracle Homes