ORA-27102: out of memory Linux-X86_64 Error: 28: No space left on device

As server memory upgraded from 64GB RAM to 96GB.Even though when I am trying to do startup the database and I am getting following error:

ORA-27102: out of memory Linux-X86_64 Error: 28: No space left on device

OS: Red Hat Linux

Database version: 10g and later

Error message:

SQL> startup nomount ORA-27102: out of memory Linux-x86_64 Error: 28: No space left on device

Verify your shmall kernel parameter it is probably set too small:

$ cat /proc/sys/kernel/shmall 2097152

Solution:

shmall  =  sum of all the SGAs on the system / page size

Determine page size using this command:

$ getconf PAGE_SIZE 4096

For example, if your sum of all SGAs on a server is 19Gb and the result of  PAGE_SIZE' is 4096 then set shmall should be set to 4980736 pages.

 19G = 20401094656 bytes

 20401094656 /  4096 = 498073

Add or edit the following line in the "/etc/sysctl.conf" file:

kernel.shmall = 4980736

Run the following command to change the current kernel parameters:

$ sysctl -p $ cat /proc/sys/kernel/shmall 4980736

Switch back to oracle user and retry the startup command.

I hope this helps.

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