Where is my ORACLE_HOME Windows directory?

  • I'm trying to find my listener.ora file to edit it, but the docs say it's in the ORACLE_HOME directory, but where is that?

    I'm running 12.1.0 on Windows Server 2008

    Windows - start the universal installer - click "Intalled Products" then the "Environment" tab.

  • Open up a command prompt

    Start -> Run -> "cmd.exe"

    Start sqlplus as administrator

    sqlplus / as sysdba

    There's a system stored procedure called get_env for retrieving the value for ORACLE_HOME, thanks Sabdar Syed for the query.

    SQL > var OHM varchar2(100);
    SQL > EXEC dbms_system.get_env('ORACLE_HOME', :OHM) ;

    Should return a path like this:


  • On Windows platform you can find oracle_home path in the registry.

    Run regedit, then navigate to:

    hkey local machine/software/oracle

    Under oracle folder in the registry you will find something like:


    There you can see oracle_home variable.

    • Start regedit (search for it from the Start menu)
    • Open the HKEY_LOCAL_MACHINE folder
    • Open the Oracle folder
    • Open a folder called ORACLEMTSR
    • Open the setup folder
    • Access to the current version

    There you will find a "file" called HOME; open it and you will see where Oracle was installed.

    At a guess, you've left out `SOFTWARE` under `HKEY_LOCAL_MACHINE` (on my machine, the items under `HKEY_LOCAL_MACHINE` are all generic, and there's only 6 of them - I'd expect Oracle's registry entry to be in `SOFTWARE`). Also, I suspect that `ORACLEMTSR` might actually be `ORACLEMSTR` (though I'm not sure, as I don't have an Oracle install handy to check). Could you double-check, to make sure the answer is in fact complete and correct?

  • On cmd, type echo %ORACLE_HOME%. If ORACLE_HOME is set it will return you the path or else it will return %ORACLE_HOME%.

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Content dated before 6/26/2020 9:53 AM