ORA-00843: Parameter not taking MEMORY_MAX_TARGET into account,

环境：
11.1.0.6.0

想禁用掉oracle 11g的内存管理特性。
把memory_max_target设为0
把memory_target设为0

启动oracle
SQL> startup
ORA-00843: Parameter not taking MEMORY_MAX_TARGET into account, see alert log for more information

解决办法：
create pfile from spfile;
删除pfile中的memory_max_target和memory_target。
create spfile from pfile;

startup成功

参考：

MEMORY_MAX_TARGET was set to 0.
Cause

The problem is caused by the MEMORY_MAX_TARGET parameter explicitly being set to 0. In case AMM should not be used, MEMORY_MAX_TARGET should not be set at all.
Solution

The solutions to the problem are:

    create a PFILE from the SPFILE being used and remove the MEMORY_MAX_TARGET=0 and MEMORY_TARGET=0 lines. After that, use the modified PFILE to create a new SPFILE and start the instance with this new setup.
    should the instance be running, then use the following commands to remove the explicit setting of MEMORY_TARGET=0 and MEMORY_MAX_TARGET=0:（在oracle运行时，可以通过下面的办法移除参数）

    alter system reset memory_target;
    alter system reset memory_max_target;