错误信息:

[oracle@db01 ~]$ dbca -silent -responsefile dbca.rsp 
Copying database files
1% complete
2% complete
4% complete
12% complete
100% complete
Look at the log file "/DBSoft/oracle/cfgtoollogs/dbca/woo/woo.log" for further details.
[oracle@db01 ~]$ cat /DBSoft/oracle/cfgtoollogs/dbca/woo/woo.log
SGA size can not be greater than maximum shared memory segment size (0). Refer to Oracle installation guide to configure your operating system kernel parameters.
Copying database files
DBCA_PROGRESS : 1%
DBCA_PROGRESS : 2%
ORA-27102: out of memory


DBCA_PROGRESS : 4%
ORA-01034: ORACLE not available


DBCA_PROGRESS : 12%
ORA-01034: ORACLE not available


DBCA_PROGRESS : 100%

检查alert告警日志：

[oracle@db01 ~]$ cat $ORACLE_BASE/diag/rdbms/woo/woo/trace/alert_woo.log 
Thu Jun 11 22:46:03 2015
Starting ORACLE instance (normal)
WARNING: The system does not seem to be configured
optimally. Creating a segment of size 0x0000000000800000
failed. Please change the shm parameters so that
a segment can be created for this size. While this is
not a fatal issue, creating one segment may improve
performance

问题分析:

问题处理：

1、首先查看下大小是多少:

[oracle@db01 ~]$ df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg_db01-lv_root
                       35G  8.7G   25G  27% /
tmpfs                 947M     0  947M   0% /dev/shm
/dev/sda1             485M   35M  425M   8% /boot

2、手动扩大tmpfs的大小

[root@db01 ~]# mount tmpfs /dev/shm -t tmpfs -o size=8g


[root@db01 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg_db01-lv_root
                       35G  8.7G   25G  27% /
tmpfs                 8.0G     0  8.0G   0% /dev/shm
/dev/sda1             485M   35M  425M   8% /boot
tmpfs                 8.0G     0  8.0G   0% /dev/shm

3、重新执行安装

[oracle@db01 ~]$ dbca -silent -responsefile dbca.rsp 
Cleaning up failed steps
5% complete
Copying database files
7% complete
9% complete
16% complete
23% complete
30% complete
41% complete
Creating and starting Oracle instance
43% complete
48% complete
53% complete
57% complete
58% complete
59% complete
62% complete
64% complete
Completing Database Creation
68% complete
71% complete
75% complete
85% complete
96% complete
100% complete
Look at the log file "/DBSoft/oracle/cfgtoollogs/dbca/woo/woo7.log" for further details.
[oracle@db01 ~]$ 




[oracle@db01 ~]$ netca /silent /responsefile netca.rsp 


Parsing command line arguments:
    Parameter "silent" = true
    Parameter "responsefile" = netca.rsp
Oracle Net Configuration Assistant could not find the Response File at the given location.
Oracle Net Services configuration failed.  The exit code is 1

4、完成之后将tmpfs最终的大小永久写入到/etc/fstab文件中

[oracle@db01 ~]$ cat /etc/fstab 


#
# /etc/fstab
# Created by anaconda on Tue Jun  9 19:17:12 2015
#
# Accessible filesystems, by reference, are maintained under ‘/dev/disk‘
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/vg_db01-lv_root /                       ext4    defaults        1 1
UUID=9ba8ae31-c918-4ad0-8408-e9e0a7d0beb4 /boot                   ext4    defaults        1 2
/dev/mapper/vg_db01-lv_swap swap                    swap    defaults        0 0
tmpfs                   /dev/shm                tmpfs   size=8g        0 0		-------修改这行内容将defaults改为需要扩展的大小size=8g 即可
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0

备注官方文档解释:

dbca -silent -responsefile 建库由于tmpfs太小报错ORA-27102: out of memory

原文：http://blog.csdn.net/wuweilong/article/details/46470437