During oracle data guard upgrade, the standby database(s) can be upgraded implicitly via the redo from the primary database, and there is no need to rebuild the standby database after upgrade.

• Before Upgrade

• Upgrade Primary Database

  • Install Oracle 19c on Primary

  • Start DBUA on Primary

• Post Upgrade

• Enable Redo Log Transport and Apply

Before Upgrade

Stop Data Guard: On primary database, defer the redo log transport to the standby

On Primary:
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SQL> show parameter log_archive_dest_2 
SQL> alter system set log_archive_dest_state_2='defer' scope=both;

Cancel redolog apply on standby and shutdown the database

On Standby:
===========

SQL> alter database recover managed standby database cancel;
SQL> Shut immediate;

Upgrade Primary Database

Install the 19c pre-install package on both primary & standby server

On Primary & Standby:
=====================

yum install -y oracle-database-preinstall-19c

Install Oracle 19c on Primary

Unzip the 19c software under 19c home and start the runInstaller

cd /u01/app/oracle/product/19.3/db_home
unzip LINUX.X64_193000_db_home.zip

./runinstaller

Purge the RECYCLEBIN and also check the pre-upgrade summary

Create a guaranteed restore point

Start DBUA on Primary

We wills tart DBUA from 19c home to upgrade 18c database to 19c version

Post Oracle Data Guard Upgrade

Install new home in standby, Update the listener on the standby host. Be sure to update the Oracle Home information in the listener.ora

vi $ORACLE_HOME/network/admin/listener.ora
lsnrctl reload

export OLD_HOME=/u01/app/oracle/product/18.3/db_home
export NEW_HOME=/u01/app/oracle/product/19.3/db_home
export ORACLE_HOME=$NEW_HOME
export ORACLE_SID=prod

#Set ORACLE_UNQNAME to DB_UNIQUE_NAME
export ORACLE_UNQNAME=standby

Copy TNS

#Back up files
cp $NEW_HOME/network/admin/tnsnames.ora
$NEW_HOME/network/admin/tnsnames.ora.backup

#Copy from old to new home
cp $OLD_HOME/network/admin/tnsnames.ora
$NEW_HOME/network/admin

Now, you can edit /etc/oratab and update the information about the

Oracle Home to match the new Oracle Home

vi /etc/oratab

Copy SPFile and password file to the new Oracle Home

cp $OLD_HOME/dbs/orapw $ORACLE_SID $ORACLE_HOME/dbs
cp $OLD_HOME/dbs/spfile $ORACLE_SID.ora
$ORACLE_HOME/dbs

Start the database

SQL> startup mount

Enable Redo Log Transport and Apply

On the primary database re-enable redo log transport to standby

database

SQL> alter system set log_archive_dest_state_2='enable'
scope=both;

On the standby database restart redo apply

SQL> alter database recover managed standby database
disconnect from session;

Thank You!!