Oracle Database Starting Error - ORA-00845: MEMORY_TARGET not supported on this system [SOLVED]

Guys

I got this error when I start oracle instance.

"ORA-00845: MEMORY_TARGET not supported on this system"

Some of the forum said about of tmpfs size which is mounted on /dev/shm.
Then I saw this post.
So I suspected it isn't enough space of share memory.

I checked with "df" command.

That space is currently amount mounted on /dev/shm. So I think that 5.9G isn't enough.
It's need to set a mount which over 5.9G manually.

Then I changed at /etc/fstab  as below. (changed "default" to "size=6g" )

Then, have restarted the host and checked the size with "df" again.

Then , try to start the instance again.

#sqlplus / as sysdba
SQL>startup

This time nothing error occur. :)

>>

UTEE

 Ref: http://www.oracle-base.com/articles/11g/automatic-memory-management-11gr1.php