Oracle11g ORA-00845: MEMORY_TARGET not supported on this system

[root@ruei ~]# umount /dev/shm
umount: /dev/shm: device is busy
umount: /dev/shm: device is busy
[root@ruei ~]#
[root@ruei ~]#  fuser -km  /dev/shm
/dev/shm:            17755m
[root@ruei ~]#  umount /dev/shm
[root@ruei ~]# mount /dev/shm
[root@ruei ~]#
[root@ruei ~]#
[root@ruei ~]# vi /etc/fstab

/dev/VolGroup00/LogVol00 /                       ext3    defaults        1 1
LABEL=/boot             /boot                   ext3    defaults        1 2
#tmpfs                   /dev/shm                tmpfs   defaults        0 0
tmpfs /dev/shm tmpfs defaults,size=20240M 0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
/dev/VolGroup00/LogVol01 swap                   swap    defaults        0 0
/dev/datavg/lv-data-ruei  /data00               ext3    defaults        1 2
#/dev/datavg1/lv-data1   /data01                ext3    defaults        1 2

 

SQL> startup
ORA-00845: MEMORY_TARGET not supported on this system
SQL>

 

SQL> startup
ORACLE instance started.

Total System Global Area 1.1491E+10 bytes
Fixed Size                  2147872 bytes
Variable Size            6442453472 bytes
Database Buffers         5033164800 bytes
Redo Buffers               13418496 bytes
Database mounted.

Database opened.
SQL> SQL>
SQL>
SQL>  create spfile from pfile='/u01/app/oracle/admin/ux/pfile/init.ora.47201392153';

File created.