ORA-00844: Parameter not taking MEMORY_TARGET into account

数据库无法启动：

ORA-00844: Parameter not taking MEMORY_TARGET into account
ORA-00851: SGA_MAX_SIZE 3170893824 cannot be set to more than MEMORY_TARGET 1610612736.

解决方法：
start force

 

参考相关命令：

show parameter target;


alter system set sga_target=3000m scope=spfile;

shutdown immediate;

startup;


alter system set processes=420 scope = spfile;


show parameter processes;
show parameter sessions;

 

sessions 与process关系：
(sessions=(1.1*process+5))