Unable open dabase as spfile parameter incorrect

Error desc:

ORA-00821: Specified value of sga_target 16M is too small, needs to be at least 4832M

 

Solution:

1.  Find spfile location and copy it to /tmp   

[oracle@slce37vmf0003 ~/env]$ asmcmd

ASMCMD> ls

DATA/

ASMCMD> cd data

ASMCMD> ls

ASM/

DB_UNKNOWN/

OIDDB/

slce37v-cls/

ASMCMD> cd oiddb

ASMCMD> ls

ARCHIVELOG/

CONTROLFILE/

DATAFILE/

ONLINELOG/

TEMPFILE/

spfileOIDDB.ora_bk_edong

spfileoiddb.ora

ASMCMD> cp spfileoiddb.ora /tmp/spfileoiddbtest.ora

copying +data/oiddb/spfileoiddb.ora -> /tmp/spfileoiddbtest.ora

ASMCMD> exit

2.   What we need to do is creating a pfile from spfile then modify parameter back to valid value, then start db from pfile

1). With db not up, we can create pfile from spfile:

SQL> create pfile='/tmp/pfileoiddbtest.ora' from spfile=’/tmp/spfileoiddbtest.ora ';

2). modify the value in pfile (for example)

$ vi initorcl.ora

*.memory_max_target=1583349760

3). startup db with pfile= '/tmp/pfileoiddbtest.ora';

SQL>startup mount –now it will use the pfile  

 

     3.  Create the new spfile to ASM storage from “good” pfile

             SQL> create spfile=’+DATA/ORCL/spfileorcl.ora’from pfile= '/tmp/pfileoiddbtest.ora';

                           File created.

4.  Watch the file name in ASM storage has been changed, which means we just had a new spfile.
5.  Update spfile location in initorcl.ora (usually in $ORACLE_HOME/sdb/)
   

             spfile=’+DATA/ORCL/spfileorcl.ora’  //(At the most times, spfile location has been atomically updated in initorcl.ora, however need to be check for caution)

5.   Alter spfileorcl file of the other db instance  if database is RAC 
6.   Restart databse