ORA-00845: MEMORY_TARGET not supported on this system

While installation of oracle database, due to high memory target getting into shared memory of low size

Here we can see than memory size is allocated as 1440 MB , and shared memory size is also set as 1500MB.

[root@orcldg u01]# df -h /dev/shm
Filesystem      Size  Used Avail Use% Mounted on
shmfs           1.5G     0  1.5G   0% /dev/shm

Workaround:

Increase the shared memory segments to resolve the issue

[root@orcldg grid]# umount tmpfs
[root@orcldg grid]# mount -t tmpfs shmfs -o size=2500m /dev/shm

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