Debian/ Ubuntu ORA-00845: MEMORY_TARGET not supported on this system

为了开启oracle 11G 的 AMM ，但是数据库运行在debian系统下。

先说下这个报错：
ORA-00845: MEMORY_TARGET not supported on this system
简单来说就是 MEMORY_MAX_TARGET 的设置不能超过 /dev/shm 的大小

要不把memory_max_target 改小，要不把/dev/shm改大。

普通linux系统：
修改/etc/fstab中tmpfs对应的行

tmpfs                   /dev/shm                tmpfs   defaults,size=4G 0 0

然后重新mount使其生效：

mount -o remount /dev/shm

Ubuntu/Debian系统：

报错原因：
因为这些系统，将/dev/shm目录改成了/run/shm，虽然已经有符号链接但是仍然出错

修改步骤：

rm -f /dev/shm
mkdir /dev/shm 
mount --move /run/shm /dev/shm 
mount -B /dev/shm /run/shm

同时，为防止机器重启，需要部署加载脚本开启启动：

vi /etc/init.d/oracle-shm

#! /bin/sh 
# /etc/init.d/oracle-shm 
# 
# 
case $1 in 
start) 
echo "Starting script /etc/init.d/oracle-shm" 
# Run only once at system startup 
if [ -e /dev/shm/.oracle-shm ]; then 
echo "/dev/shm is already mounted, nothing to do" 
else 
rm -f /dev/shm 
mkdir /dev/shm 
#mount -B /run/shm /dev/shm 
mount --move /run/shm /dev/shm 
mount -B /dev/shm /run/shm 
touch /dev/shm/.oracle-shm 
fi    
;; 
stop) 
echo "Stopping script /etc/init.d/oracle-shm" 
echo "Nothing to do" 
;; 
*) 
echo "Usage:/etc/init.d/oracle-shm {start|stop}" 
exit 1 
;;  
esac 
# 
### BEGIN INIT INFO 
# Provides:         oracle-shm 
# Required-Start:   $remote_fs $syslog 
# Required-Stop:    $remote_fs $syslog 
# Default-Start:    2 3 4 5   www.2cto.com  
# Default-Stop:     0 1 6 
# Short-Description:Bind /run/shm to /dev/shm at system startup. 
# Description:      Fix to allow Oracle 11g use AMM on debian system. 
### END INIT INFO