ORA-00845: MEMORY_TARGET not supported on this system

Cause:

Memory Target  error come due to lack of tmp space on server .



[oracle@rac1 ~]$ df -h
Filesystem                   Size  Used Avail Use% Mounted on
/dev/mapper/vg_rac1-lv_root   26G   20G  5.0G  80% /
tmpfs                        1.5G  442M  1.1G  31% /dev/shm
/dev/sda1                    477M   55M  397M  13% /boot
[oracle@rac1 ~]$
[oracle@rac1 ~]$


Solution :

Need to increase temp space on server

# umount tmpfs
# mount -t tmpfs shmfs -o size=4048m /dev/shm

Make entry in fstab file on /etc/fstab 


[root@rac1]$ cat /etc/fstab

#
# /etc/fstab
# Created by anaconda on Sun Sep 18 01:17:50 2016
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/vg_rac1-lv_root /                       ext4    defaults        1 1
UUID=b6ddbb52-c2ca-43c3-b9ac-10bb01e90d27 /boot                   ext4    defaults        1 2
/dev/mapper/vg_rac1-lv_swap swap                    swap    defaults        0 0
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
shmfs                   /dev/shm                tmpfs   size=4048m      0 0
[oracle@rac1 trace]$

reboot server
init 6

start database .