Installation Guide Installing and Patching Oracle Applications and Oracle Database Perform Oracle Database 19c Post-Upgrade Tasks Perform Oracle Database 19c Post-Upgrade Tasks After you upgrade the Oracle Database to 19c, perform the following tasks. Apply Patches for Oracle Database 19c Update PDB GLOBAL_NAME to Uppercase Unset optimizer_features_enable Set FILESYSTEMIO_OPTIONS to SETALL Check job_queue_processes Set Parameter Values Create New Indexes Set the PL/SQL Service Instances Value Gather Statistics Compile Invalid Objects Parent topic: Installing and Patching Oracle Applications and Oracle Database