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Complete Checklist for DBUA Upgrade from to 12.1.0.N (Doc ID 1933011.1)

Last updated on NOVEMBER 21, 2023

Applies to:

Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.


The purpose of this article is to minimize the downtime while upgrading the database using DBUA.

Database Upgrade Assistant (DBUA) interactively steps you through the upgrade process and configures the database for the new Oracle Database release.

DBUA automates the upgrade process by performing all of the tasks normally performed manually.

DBUA makes appropriate recommendations for configuration options such as tablespaces and redo logs. You can then act on these recommendations. DBUA provides support for Oracle Real Application Clusters (Oracle RAC). In an Oracle RAC environment, DBUA upgrades all the database and configuration files on all nodes in the cluster.


 Database Administrators, Support


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In this Document
 Step 1: Database Upgrade Assistant (DBUA)
 Step 2: Recommendations for Source database
 Step 4 Pre-Upgrade Steps
 Step 4.1 Preupgrade script execution
 Step 4.2 Collect Statistics
 Step 4.3 Verify That Materialized View Refreshes Have Completed Before Upgrading database
 Step 4.4 Ensure That No Files Need Media Recovery Before Upgrading
 Step 4.5 Ensure That No Files Are in Backup Mode Before Upgrading
 Step 4.6 Resolve Outstanding Distributed Transactions Before Upgrading
 Step 4.7 Purge the Database Recycle Bin Before Upgrading
 Step 4.8 Disable all batch and cron jobs
 Step 4.9 Verify SYS and SYSTEM Default tablespace
 Step 4.10 Review and Remove any unnecessary hidden/underscore parameters
 Step 5  Upgrade steps 

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