ORA-00845 MEMORY_TARGET not supported on this system解决办法
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ORA-00845: MEMORY_TARGET not supported on this system报错解决
SQL> startup
ORA-00845: MEMORY_TARGET not supported on this system
在oracle 11g中新增的内存自动管理的参数MEMORY_TARGET,它能自动调整SGA和PGA,这个特性需要用到/dev/shm共享文件系统,而且要求/dev/shm必须大于MEMORY_TARGET,如果/dev/shm比MEMORY_TARGET小就会报错
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:
2.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
[email protected] ~]$ df -h
……
tmpfs 16G 8.9G 7.2G 56% /dev/shm
……
下面为一次操作的记录
[[email protected] ~]# cat /etc/fstab | grep tmpfs
tmpfs /dev/shm tmpfs defaults,size=8g 0 0
[[email protected] ~]#
[[email protected] ~]# mount -o remount,size=16G /dev/shm
[[email protected] ~]# vi /etc/fstab
...
tmpfs /dev/shm tmpfs defaults,size=16g 0 0
...
[[email protected] ~]# 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
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