1.VIP验证报错
[INS-40912] Virtual host name:dena3vip is assigned to annother system
该错误是由于hosts里面配置的VIP ip被占用导致，更换掉IP即可
2.启动数据库提示 ORA-01092: ORACLE instance terminated. Disconnection forced ORA-30013: undo tablespace 'UNDOTBS1' is currently in use
SQL> startup; ORACLE instance started. Total System Global Area 1670221824 bytes Fixed Size 2253824 bytes Variable Size 1291848704 bytes Database Buffers 369098752 bytes Redo Buffers 7020544 bytes Database mounted. ORA-01092: ORACLE instance terminated. Disconnection forced ORA-30013: undo tablespace 'UNDOTBS1' is currently in use Process ID: 18539 Session ID: 16 Serial number: 5
改错误是由于实例所对应的undo_tablespace不一致，导致undo_tablespace出现争用。备份好spfile，修改对应undo_tablespace即可
该问题在创建数据库的时候提示过，但只是警告，被我忽略了。我怀疑是环境变量的ORACLE_SID与Policy-Managed创建出来的SID不一致导致的（未做测试，只是猜测）
SQL> startup mount; ORACLE instance started. Total System Global Area 1670221824 bytes Fixed Size 2253824 bytes Variable Size 1291848704 bytes Database Buffers 369098752 bytes Redo Buffers 7020544 bytes Database mounted. SQL> create pfile='/home/oracle/pfile.ora' from SPFILE='+DGSYSTEM01/dena/spfiledena.ora'; File created. SQL> show parameter undo_tablespace; NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ undo_tablespace string UNDOTBS3 SQL> alter system set undo_tablespace=UNDOTBS2; alter system set undo_tablespace=UNDOTBS2 * ERROR at line 1: ORA-02097: parameter cannot be modified because specified value is invalid ORA-01219: database not open: queries allowed on fixed tables/views only SQL> alter system set undo_tablespace=UNDOTBS2 scope=spfile; System altered. SQL> shutdown immediate; ORA-01109: database not open Database dismounted. ORACLE instance shut down. SQL> startup; ORACLE instance started. Total System Global Area 1670221824 bytes Fixed Size 2253824 bytes Variable Size 1291848704 bytes Database Buffers 369098752 bytes Redo Buffers 7020544 bytes Database mounted. Database opened. SQL> select open_mode from v$database; OPEN_MODE -------------------- READ WRITE SQL>