In this article we will be performing Oracle 11g to 12c database upgrade with data guard and ASM configured. Below are the steps we are going to follow to perform the database upgrade: Upgrade GRID_HOME on standby Upgrade ORACLE_HOME on standby Upgrade GRID_HOME on primary Upgrade ORACLE_HOME on primary Post upgrade steps Let us start the upgrade process.In this article we will be performing Oracle 11g to 12c database upgrade with data guard and ASM configured. Below are the steps we are going to follow to perform the database upgrade: Upgrade GRID_HOME on standby Upgrade ORACLE_HOME on standby Upgrade GRID_HOME on primary Upgrade ORACLE_HOME on primary Post upgrade steps Let us start the upgrade process. Full article link is here: https://www.support.dbagenesis.com/post/oracle-11g-to-12c-upgrade-with-data-guard-asm

1. ORACLE
11G TO 12C
UPGRADE WITH
DATA GUARD &
ASM

2. Upgrade GRID_HOME
on Standby
DISABLE DG BROKER (only on primary)
1. Disable fast-start failover
As part of upgrade, you must disable DG Broker.
Disable fast-start failover if it is enabled

3. 2. Disable DG BROKER configuration
3. Disable DG BROKER START via sqlplus
4. Take backup of broker configuration files
At this stage, it’s good to take backup of dg
broker configuration files.

4. ON STANDBY
1. Stop MRP or Log Apply Services
We must stop MRP. Note, we are not stopping log shipping from
primary. Log shipping will continue.

5. We must remove database from srvctl utility as it might auto restart
database during upgrade process which we do not want. Once upgrade
is done, we will re-register database with 12c srvctl utility
2. Disable oracle restart (srvctl)

6. We will now download and upgrade oracle 12c grid software in a
new grid home location. Note, you cannot have two grid
softwares on a server. Hence, you can only upgrade any previous
version of grid.
3. Download and upgrade oracle 12c grid software (as grid user)

7. 4. Unzip linux 12c grid software
5. Start the run installer

8. Follow the below screens to upgrade the grid software

20. Once the installation is done, you need to proceed with post grid
upgrade steps below.

21. POST GRID UPGRADE
STEPS (on standby)
1. Change grid environment variables
Change ORACLE_HOME location under grid user .bash_profile

23. Upgrade
ORACLE_HOME
on Standby
Note: In any grid environment, first
we have to upgrade the grid software
and then the database software. The
grid software can be of same or higher
release than the database.

24. 1. Unzip the database software as oracle user on standby
switch to oracle user and unzip the database software.

25. 2. Start the run installer and install oracle 12c database
software on standby
Now its time to install oracle 12c in a new home.

39. 3. Shutdownstandby database if running from old home
Shutdown the database which is running via old oracle 11g home.

40. From the old oracle 11g home, copy the tnsnames.ora file to new 12c
ORACLE_HOME/network/admin location
4. Copy tnsnames.ora to new home

41. From the old 11g home, copy the pfile and password file to new 12c
ORACLE_HOME/dbs location
5. Copy parameter file and password file to new home

42. Update old Oracle Home with 12c oracle home in /etc/oratab file on
standby.
6. Modify oratab to reflect new oracle home
7. Modify oracle user environment variables
Update oracle user bash profile to point new 12c oracle home

44. Now that bash profile is pointing
to 12c home, mount the standby
database and start MRP apply.
8. Mount the standby via 12c home

45. 9. Update new oracle home in listener

46. We need to register standby
database with srvctl utility as
it will help us manage
database easly.
10. Register with oracle 12c restart (srvctl)
Note: even though we can
start stop standby database
via srvctl utility, we must
always start MRP manually.

47. Upgrade GRID_HOME
on Primary
1. Disable oracle restart (srvctl) on primary
The srvctl utility will auto restart our database
which we do not want during the upgrade.

48. 2. Increase RAM and start DB manually
In your practice, you might have assigned less
RAM. For upgrade, you must have 4 GB allocated
both on primary and standby.
Make sure primary has 4 GB RAM, if not, stop the
virtual machine, increase RAM and then start it up.
Once machine is up, start DB manually

49. 3. Download and upgrade oracle 12c grid software (as grid user)
We will now download and upgrade oracle 12c grid software in a new
grid home location. Note, you cannot install two grid software on a
server. Hence, you can only upgrade any previous version of grid.

50. 4. Unzip linux 12c grid software
5. Start the run installer

51. Follow the below screens to upgrade the grid software

64. Once the installation is done, you need to proceed
with post grid upgrade steps below.

65. POST GRID UPGRADE
STEPS (on primary)
1. Change grid environment variables
Change ORACLE_HOME location under grid
user .bash_profile

67. Upgrade ORACLE_HOME
on Primary
Note: In any grid environment, first we have to upgrade the grid software and
then the database software. The grid software can be of same or higher
release than the database.

68. 1. Unzip the database software as oracle user on primary
switch to oracle user and unzip the database software.

69. 2. Start the run installer and install oracle 12c database
software on standby
Now it’s time to install oracle 12c in a new home.

83. 3. Make sure DB is up and running at this stage
From the old oracle 11g home, copy the tnsnames.ora file to
new 12c ORACLE_HOME/network/admin location
4. Copy tnsnames.ora to new home:

84. 5. Modify oracle user environment variables
Update oracle user bash profile to point new 12c oracle home

85. 6. Update new oracle home in listener
We must also update the listener file to point new 12c home
location as grid user.

86. 7. Start DBUA
Let us upgrade the 11g database to 12c. Make sure DB is still
up and running via 11g home
Follow the screens and upgrade the database.

97. Post Upgrade Steps
Check /etc/oratab file
Check dbs location for parameter & password file
Check DR is in sync with prod
Perform Prim – stb bounce
Add database to Oracle restart or SRVCTL on primary
Enable DG Broker
Remove 11g grid and oracle home from both systems
Update compatibility parameter (requires db bounce and
must be performed after 30 days of the upgrade)

98. Courses | Projects | Bootcamps