Starting DBUA

If you install the Oracle Database software only and specify that you are upgrading an existing database to the new Oracle Database release, then DBUA is launched automatically after the software installation. You can then continue as described in "Upgrading a Database Using DBUA."

If you perform a software-only installation and do not upgrade your database at that time, then you can do so later by launching DBUA.

Be aware of the following before you begin using DBUA:

• When upgrading a non-Oracle RAC database, you must run Oracle Net Configuration Assistant (NETCA) before running DBUA. When upgrading an Oracle RAC database, as part of the Oracle Clusterware upgrade, Oracle Universal Installer (OUI) automatically runs NETCA to upgrade the network listener. Therefore, do not separately run NETCA.

• It is not possible to upgrade a database with DBUA when the source and target Oracle homes are owned by different users.

• If you stop the upgrade, but do not restore the database, then you cannot restart DBUA until you start the database instance in UPGRADE mode using the Oracle Database 12c server. You cannot go back to the original Oracle Database server version unless you restore your database. Instead, you must continue with a manual (command line) upgrade.

• If you restore your database manually (not using DBUA), then remove the following file from the Oracle Database 12c home directory before starting DBUA:

  $ ORACLE_HOME/cfgtoollogs/dbua/logs/Welcome_SID.txt
  

  The presence of this file indicates to DBUA that this is a re-run operation.

To start DBUA on Microsoft Windows:

1. Configure the operating system environment variables, as described in "Configuring the Operating System Environment Variables ."

2. Click Start, then select Programs (or All Programs)

3. Select Oracle - HOME_NAME

4. Select Configuration and Migration Tools

5. Select Database Upgrade Assistant

   The DBUA Select Operation page appears.

To start DBUA on any supported platform: