SQL> conn /as sysdba
Connected to an idle instance.
SQL> startup
ORACLE instance started.
Total System Global Area 276824064 bytes
Fixed Size 778736 bytes
Variable Size 137371152 bytes
Database Buffers 138412032 bytes
Redo Buffers 262144 bytes
ORA-01102: cannot mount database in EXCLUSIVE mode
SQL> shutdown immediate
ORA-01507: database not mounted
ORACLE instance shut down.
GOOGLE一下,发现是lk<SID>文件造成的,该文件位于ORALCE_HOME下的dbs目录下,马上检查该文件:
未发现该文件
关于该错误更详细的介绍如下:原文链接:http://www.hellodba.com/cases/case-unexception_down.htm
还有些原因是内存未释放,信号量的问题,直接重启机器,问题解决