After you upgrade Oracle Database, complete required post-upgrade tasks, and consider recommendations for the new release.

Topics:

• Check the Upgrade With Post-Upgrade Status Tool
  Review the upgrade spool log file and use the Post-Upgrade Status Tool, utlu122s.sql.
• How to Show the Current State of the Oracle Data Dictionary
  Use one of three methods to check the state of the Oracle Data Dictionary for diagnosing upgrades and migrations.
• Required Tasks to Complete After Upgrading Oracle Database
  Review and complete these required tasks that are specified for your environment after you complete your upgrade.
• Required Environment Variable Checks After Oracle Grid Infrastructure Upgrades
  Review these topics to understand environment variable changes for Oracle Database and Oracle Grid Infrastructure 12c.
• Role-Allocated Software Owners and Database Upgrade After Oracle ASM Upgrade
  Review these topics if you have an existing Oracle ASM installation that you installed before Oracle Grid Infrastructure and Oracle Database 11g Release 2 (11.2).
• Recommended and Best Practices to Complete After Upgrading Oracle Database
  Oracle recommends that you complete these good practices guidelines for updating Oracle Database. These practices are recommended for both manual and DBUA upgrades.
• Recommended Tasks After Upgrading an Oracle RAC Database
  Decide if you want to configure clients to use SCAN or node listeners for connections.
• Recommended Tasks After Upgrading Oracle ASM
  After you have upgraded Oracle ASM, Oracle recommends that you perform tasks such as resetting the Oracle ASM passwords and configuring disk groups.
• Recommended Tasks After Upgrading Oracle Database Express Edition
  Use DBCA or run manual scripts to install additional components into Oracle Database.
• Oracle Application Express PDB Plugin Considerations
  Review this information if you use multitenant architecture, and after the upgrade, you want to plug in a PDB that contains Oracle Application Express releases 5.0.0, 5.0.1, or 5.0.2.
• Tasks to Complete Only After Manually Upgrading Oracle Database
  After you complete your upgrade, you must perform the tasks described here if you upgrade your database manually instead of using DBUA.