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
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