ORA-00838: Specified value of MEMORY_TARGET is too small, needs to be at least 3072M – Oracle 12c

Cause: Existing MEMORY_TARGET value not enough to start database.
Solution: Increase MEMORY_TARGET value.

Consider following workaround:
[oracle@12c bin]$ sqlplus “/ as sysdba”
SQL*Plus: Release 12.1.0.1.0 Production on Mon Jun 9 11:15:45 2014
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup
ORA-00838: Specified value of MEMORY_TARGET is too small, needs to be at least 3072M
// As we know spfile isn’t human readable or editable, create pfile from spfile. So that we able to change oracle system parameter. ( i.e. MEMORY_TARGET )
SQL> create pfile=’/tmp/pfile.bac’ from spfile;
File created.
// After file has created, change MEMORY_TARGET parameter value from pfile.
[oracle@12c ~]$ nano /tmp/pfile.bac
*.memory_target=3072M
// Start oracle database with newly updated pfile as follows.
[oracle@12c ~]$ sqlplus “/ as sysdba”
SQL*Plus: Release 12.1.0.1.0 Production on Mon Jun 9 11:24:56 2014
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup pfile=/tmp/pfile.bac
ORACLE instance started.
Total System Global Area 3206836224 bytes
Fixed Size 2293496 bytes
Variable Size 1879048456 bytes
Database Buffers 1308622848 bytes
Redo Buffers 16871424 bytes
Database mounted.
Database opened.
// Create spfile from newly created pfile. As we are using spfile for our database.
SQL> create spfile from pfile=’/tmp/pfile.backup';
File created.
// Bounce the database after creating spfile to reflect changes in environment.
SQL> startup force;
ORACLE instance started.
Total System Global Area 3206836224 bytes
Fixed Size 2293496 bytes
Variable Size 1879048456 bytes
Database Buffers 1308622848 bytes
Redo Buffers 16871424 bytes
Database mounted.
Database opened.
// Ensure changes by following command.
SQL> show parameter memory_target
NAME TYPE VALUE
———————————— ———– ——————————
memory_target    big integer    3G

Cheers!! Now you are free to do your pending works
Read more : http://dbatricksworld.com/ora-00838-specified-value-of-memory_target-is-too-small-needs-to-be-at-least-3072m-oracle-12c/

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