SGA_TARGET参数配置错误导致Oracle服务无法启动的处理方式

使用sqlplus启动时报如下错误：
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
查看数据库启动报错日志：
F:\app\Administrator\product\11.2.0\dbhome_1\database\oradim.log
ORA-00823: Specified value of sga_target greater than sga_max_size

Step0: 进入cmd, 输入: sqlplus /nolog
Step1: create pfile=‘e:/pfile01.ora’ from spfile;

Step2: shutdown immedate;
Step3: 修改pfile01.ora中sga_target/sgq_max_size

Step4: startup pfile=‘e:/pfile01.ora’;
Step5: create spfile from pfile=‘e:/pfile01.ora’;
Step6: shutdown immediate;
Step7: startup