修改spfile的参数后oracle10g不能启动报ORA-00824的解决办法：
ORA-00824: cannot set sga_target due to existing internal settings, see alert log for more information
[oracle@beijing ~]$ sqlplus / as sysdba
........................................
SQL> shutdown NORMAL
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL>create spfile from pfile='/u01/app/oracle/admin/kgd/pfile/init.ora.10302007135315';
File created.
SQL> startup
ORACLE instance started.
Total System Global Area 905969664 bytes
Fixed Size 1222552 bytes
Variable Size 230688872 bytes
Database Buffers 671088640 bytes
Redo Buffers 2969600 bytes
Database mounted.
Database opened.
SQL>
OK,搞定