Error While upgrading Oracle 11g to 12c: ORA-00837: Specified value of MEMORY_TARGET greater than MEMORY_MAX_TARGET


Article ID: 184727


Updated On:


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During the PreUpgrade step of DBUA (Database Upgrade Assistant) upgrading Oracle 11g to 12c it shows the error:

Error: ORA-00837: Specified value of MEMORY_TARGET greater than MEMORY_MAX_TARGET

ORA-00837: Specified value of MEMORY_TARGET greater than MEMORY_MAX_TARGET


While Oracle 12c is validating the parameters it got a conflict in memory settings.


Oracle 12c (Upgrading from Oracle 11g)


Using the 11g instance, the configuration must be fixed:

From the Linux terminal or Windows command prompt, enter the SQLPLUS tool:

sqlplus /nolog

Log as sys user:

conn sys/password as sysdba;

Run the follow command and compare the value of MEMORY_TARGET and MEMORY_MAX_TARGET:

show parameter memory;

Then, change the MEMORY_MAX_TARGET to a value greater than the MEMORY_TARGET: (M is for values in Megabytes and G in Gigabytes)

alter system set memory_max_target = nM scope=spfile;

 After get the message System Altered, restart the DBUA tool to complete the upgrade.

It's possible to have a message that the instance is idle:

Connected to an idle instance.

Then, you need to use another approach to fix the issue.

After logged in as sys user, run the following commands on SQLPLUS:

create pfile from spfile;

The file is created in the following folder:
Windows: %ORACLE_HOME%\database\init.ora
Linux: &ORACLE_HOME/database/init.ora
(check the timestamp of the newer file).

Edit the file and find the MEMORY_TARGET and MEMORY_MAX_TARGET parameters and fix the values.

Save the file. Back to the SQLPLUS, run the command (using a Windows installation as an example):

create spfile from pfile=C:\oracle\product\\db_1\dabase\init.ora;

After the startup, connect as sys user and check if the parameters are correct:

show parameter memory;

If it's ok, restart the DBUA tool and coplete the upgrade.


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