Oracle 11gORA-00845: MEMORY_TARGET not supported on this system 说明

[INS-35172]Target database memory (XXMB) exceeds the systems available shared memory({0}MB) 解决方法

 tmpfs            /dev/shm       tmpfs  defaults,sysfs iis7站长之家=3G       0 0 

tmpfs 的值默认情况是为系统内存的一半，这种配置放在，在RedHat 系统下可以正常使用，但是我在Oracle Linux 6.1 下测试，发现这个参数不能生效，即使这里设成3G，OS 启动完毕后，查看tmpfs 的大小还是会变成内存的一半。 

[root@rac1 ~]# df -lh

Filesystem            Size  Used Avail Use% Mounted on

/dev/sda3              14G   11G 2.4G  83% /

tmpfs                 3.0G     0 3.0G   0% /dev/shm

/dev/sda1             194M   46M 139M  25% /boot

tmpfs                 3.0G     0 3.0G   0% /dev/shm

[root@rac1 ~]# cat /etc/fstab

#

# /etc/fstab

# Created by anaconda on Tue Nov 2213:02:55 2011

#

# Accessible filesystems, by reference, aremaintained under '/dev/disk'

# See man pages fstab(5), findfs(8),mount(8) and/or blkid(8) for more info

#

UUID=b1d2de8e-de31-4deb-b4e8-755c0ed01616/                       ext4    defaults        1 1

UUID=4df5aa5f-8ef0-473a-931a-51d11e21aa53/boot                   ext4    defaults        1 2

UUID=82085104-5021-4aaf-8e85-f213998107b6swap                    swap    defaults        0 0

devpts                  /dev/pts                devpts  gid=5,mode=620  0 0

sysfs                   /sys                    sysfs   defaults        0 0

proc                    /proc                   proc    defaults        0 0

[root@rac1 ~]# 

因此如果我们只修改/etc/fstab,在Oracle Linux6.1 下没有影响。 

#mount -f /dev/shm >/dev/null2>&1 

# Mount all other filesystems (except forNFS and /proc, which is already

# mounted). Contrary to standard usage,

# filesystems are NOT unmounted in singleuser mode.

if [ "$READONLY" !="yes" ] ; then

       action $"Mounting local filesystems: " mount -a -tnonfs,nfs4,smbfs,ncpfs,cifs,gfs,gfs2 -O no_netdev

else

       action $"Mounting local filesystems: " mount -a -n -tnonfs,nfs4,smbfs,ncpfs,cifs,gfs,gfs2 -O no_netdev

fi 

if [ "$READONLY" !="yes" ] ; then

       action $"Mounting local filesystems: " mount -a -tnonfs,nfs4,smbfs,ncpfs,cifs,gfs,gfs2 -O no_netdev

else

       action $"Mounting local filesystems: " mount -a -n -t nonfs,nfs4,smbfs,ncpfs,cifs,gfs,gfs2 -Ono_netdev

fi 

[root@rac1 ~]# df -lh

Filesystem            Size  Used Avail Use% Mounted on

/dev/sda3              14G   11G 2.4G  83% /

/dev/sda1             194M   46M 139M  25% /boot 

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