0 ORA-00845: MEMORY_TARGET not supported on this system

While setting up the AMM, I get the ORA-00845 error. This is because that the shared memory file system is not big enough to accommodate the MEMORY_TARGET and MEMORY_MAX_TARGET values,

Check the share memory file

df -m /dev/shm

Change the shm

only root can umount the tmpfs

umount tmpfs

mount -t tmpfs shmfs -o size=1300m /dev/shm