ORA-01102: cannot mount database in EXCLUSIVE mode

ORA-01102: cannot mount database in EXCLUSIVE mode

mv lkBOCODB /usr/local/oracle

ORA-00845: MEMORY_TARGET not supported on this system

问题定位：安装数据库时或者修改了参数MEMORY_TARGET或者SGA_TARGET的大小。
 SGA参数的大小超过了操作系统/dev/shm的大小。
 linux安装完后默认/dev/shm为物理内存的一半。

改小了MEMORY_TARGET值

ORA-00205: error in identifying control file, check alert log for more info

ORA-00210: cannot open the specified control file
ORA-27086: unable to lock file - already in use

ORA-01507: database not mounted

进程挂死重启reboot