修改Spfile参数文件后无法打开数据库

做Oracle试验时，改了一个spfile参数文件的数值，具体是哪个数值记不清了，重新打开数据库时如下提示：

SQL> startup;

ORA-01078: failure in processing system parameters

ORA-00824: cannot set SGA_TARGET or MEMORY_TARGET due to existing internal settings

ORA-00842: DB_BLOCK_BUFFERS cannot be set with SGA_TARGET or MEMORY_TARGET

查找系统中存在的Pfile参数文件。

[root@localhost ~]# find / -name "*.ora.*"

/u01/app/oracle/admin/orcl/pfile/init.ora.992011144136

/u01/app/oracle/product/11.2.0/dbhome_1/ldap/admin/ldap.ora.sample

/u01/app/oracle/product/11.2.0/dbhome_1/hs/admin/listener.ora.sample

/u01/app/oracle/product/11.2.0/dbhome_1/hs/admin/tnsnames.ora.sample

/u01/app/oracle/product/11.2.0/dbhome_1/inventory/Templates/hs/admin/listener.ora.sample

/u01/app/oracle/product/11.2.0/dbhome_1/inventory/Templates/hs/admin/tnsnames.ora.sample

就用Pfile文件试着打开数据库。

SQL> startup nomount pfile='/u01/app/oracle/admin/orcl/pfile/init.ora.992011144136';

ORACLE instance started.

Total System Global Area  233861120 bytes

Fixed Size                  2212088 bytes

Variable Size             159387400 bytes

Database Buffers           67108864 bytes

Redo Buffers                5152768 bytes

加载数据库至mount状态。

SQL> alter database mount;

Database altered.

打开数据库。

SQL> alter database open;

Database altered.