ORA-00845: MEMORY_TARGET not supported on this system

SQL> startup

ORA-00845: MEMORY_TARGET not supported on this system

 

 

解决方案

1.初始化参数MEMORY_TARGET或MEMORY_MAX_TARGET不能大于共享内存(/dev/shm),为了解决这个问题，可以增大/dev/shm

如：

# mount -t tmpfs shmfs -o size=7g /dev/shm

2.为了确保操作系统重启之后能生效，需要修改/etc/fstab文件

shmfs /dev/shm tmpfs size=7g 0

3.如果/dev/shm没有挂载也会报上面的错，所认需要确保已经挂载

oracle@aaaprod-db ~]$ df -h

……

tmpfs                16G 8.9G 7.2G 56% /dev/shm

……

下面为一次操作的记录

[root@aaaprod-db ~]# cat /etc/fstab | grep tmpfs

tmpfs                  /dev/shm              tmpfs  defaults,size=8g      0 0

[root@aaaprod-db ~]#

[root@aaaprod-db ~]# mount -o remount,size=16G /dev/shm

[root@aaaprod-db ~]#

[root@aaaprod-db ~]# cat /etc/fstab | grep tmpfs

tmpfs                  /dev/shm              tmpfs  defaults,size=8g      0 0

[root@aaaprod-db ~]# vi /etc/fstab

/dev/rootvg/LogVol02  /                      ext3  defaults      1 1

/dev/rootvg/LogVol01  /tmp                  ext3  defaults      1 2

/dev/rootvg/lvol0    /ebao                  ext3  defaults      1 2

/dev/rootvg/lvol1    /backup                ext3  defaults      1 2

LABEL=/boot            /boot                  ext3  defaults      1 2

tmpfs                  /dev/shm              tmpfs  defaults,size=16g      0 0

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

sysfs                  /sys                  sysfs  defaults      0 0

proc                  /proc                  proc  defaults      0 0

/dev/rootvg/LogVol00  swap                  swap  defaults      0 0

"/etc/fstab" 10L, 769C written

[root@aaaprod-db ~]# df -h|grep shm

tmpfs                16G    0  16G  0% /dev/shm

SQL> startup

ORACLE instance started.

Total System Global Area 9420095488 bytes

Fixed Size                2236248 bytes

Variable Size          2315255976 bytes

Database Buffers        7046430720 bytes

Redo Buffers              56172544 bytes

Database mounted.

Database opened.

SQL> exit