[Oracle]ORA-00845: MEMORY_TARGET not supported on this system解决

os： redhat6  oracle11.2 

描述：

ORA-00845: MEMORY_TARGET not supported on this system

[oracle@oracle dbs]$ sqlplus "/as sysdba"
SQL> startup
ORA-00845: MEMORY_TARGET not supported on this system


解决：
[oracle@oracle dbs]$ df  -h  /dev/shm
Filesystem            Size  Used Avail Use% Mounted on
tmpfs                 2.4G  1.2G  1.3G  48% /dev/shm


[oracle@oracle dbs]$ su root 
Password: 
[root@oracle dbs]# mount -o remount,size=4G /dev/shm
[root@oracle dbs]# exit
exit
[oracle@oracle dbs]$ df -h |grep shm
tmpfs                 4.0G  1.2G  2.9G  29% /dev/shm
[oracle@oracle dbs]$ sqlplus "/as sysdba"
SQL> startup
ORACLE instance started.
总结：一个参数配置的不正确，实际值超过了实际的阀值