ORA-27102: out of memory

-bash-3.2$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Tue Mar 18 00:02:04 2014

Copyright (c) 1982, 2011, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup
ORA-27102: out of memory

Linux-x86_64 Error: 28: No space left on device
usually it is because the SGA_target is greater than the share mem in the OS.So we could solve it by the way of increasing the sharing memory in the OS.

-bash-3.2$ /usr/local/packages/aime/ias/run_as_root "su -"

[root@slcah775 ~]# vi /etc/sysctl.conf

Change the parameter kernel.shmall = 45097156608

You have new mail in /var/spool/mail/root
[root@slcah775 ~]# /sbin/sysctl  -p
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.ip_local_port_range = 32768   61000
net.ipv4.tcp_tw_recycle = 1
kernel.panic = 60
kernel.sysrq = 1
kernel.shmall = 45097156608
kernel.shmmni = 4096
kernel.shmmax = 37977622528
kernel.sem = 250 48000 100 192
kernel.core_uses_pid = 1
fs.suid_dumpable = 1
fs.file-max = 6815744
fs.aio-max-nr = 3145728
net.ipv4.icmp_ignore_bogus_error_responses = 1
net.core.rmem_max = 4194304
net.core.wmem_max = 1048576
net.core.rmem_default = 524288
net.core.wmem_default = 524288
[root@slcah775 ~]# /sbin/shsctl -n kernel.shmmax
-bash: /sbin/shsctl: No such file or directory
[root@slcah775 ~]# /sbin/sysctl -n kernel.shmmax
37977622528
[root@slcah775 ~]# exit
logout
-bash-3.2$ id
uid=61012614(ora12614) gid=64012614(ems12614) groups=64012614(ems12614)
-bash-3.2$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Tue Mar 18 00:11:17 2014

Copyright (c) 1982, 2011, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup
ORACLE instance started.

Total System Global Area 4275781632 bytes
Fixed Size                  2235208 bytes
Variable Size             989856952 bytes
Database Buffers         3271557120 bytes
Redo Buffers               12132352 bytes
Database mounted.
Database opened.
It works