ORA-00845:MEMORY_TARGET not supported on this system

1.启动数据库报错如下 ：

SYS@ orcl >startup

ORA-00845: MEMORY_TARGET not supported on this system

 

2.查看警告日志

tail /u01/app/oracle/diag/rdbms/orcl/orcl/trace/alert_orcl.log

 

报错原因是/dev/shm值太小，至少大于1168才可以

 

3.查看/dev/shm大小

 

4.root用户加大/dev/shm

mount -o remount,size=2G /dev/shm

5.startup数据库

6.df -h 查看/dev/shm是否改变大小