Talk:RAC Attack - Oracle Cluster Database at Home/RAC Attack 12c/Linux Post Installation No Internet

Suggestion :-

you need to size /dev/shm correctly to hold the ASM SGA.

i got this error after grid install, and ASM startup phase.

ORA-00845: MEMORY_TARGET not supported on this system

12c, ASM default MEMORY target is 1G .i would recommend to size shm double or triple the size of ASM SGA.

This helped me.

[root@collabn2 ~]# umount -l tmpfs [root@collabn2 ~]# mount -t tmpfs tmpfs -o size=5240m /dev/shm [root@collabn2 ~]# df -k | grep shm tmpfs                            5365760        0   5365760   0% /dev/shm

Edit /etc/fstab tmpfs                  /dev/shm                tmpfs   size=5240m      0 0

RK vallayil (discuss • contribs) 03:36, 17 October 2014 (UTC)