Oracle数据库启动的时候直接关闭，查看告警日志：
Errors in file /opt/oracle/diag/rdbms/orcl11g/orcl11g/trace/orcl11g_mmon_3749.trc (incident=65276):
ORA-00600: internal error code, arguments: [4194], [0x000000011], [0x7F9676793990], [], [], [], [], [], [], [], [], []
Incident details in: /opt/oracle/diag/rdbms/orcl11g/orcl11g/incident/incdir_65276/orcl11g_mmon_3749_i65276.trc
ORACLE Instance orcl11g (pid = 13) - Error 1578 encountered while recovering transaction (20, 27).
Errors in file /opt/oracle/diag/rdbms/orcl11g/orcl11g/trace/orcl11g_smon_3745.trc:
ORA-01578: ORACLE data block corrupted (file # 10, block # 2088)
ORA-01110: data file 10: '/opt/oracle/oradata/orcl11g/undotb02.dbf'
Completed: ALTER DATABASE OPEN
Mon Nov 10 22:40:18 2014
Trace dumping is performing id=[cdmp_20141110224018]
Mon Nov 10 22:40:20 2014
Starting background process SMCO
Mon Nov 10 22:40:20 2014
SMCO started with pid=26, OS id=3805
Trace dumping is performing id=[cdmp_20141110224020]
Exception [type: SIGSEGV, Address not mapped to object] [ADDR:0x79C8DBF3] [PC:0x2297740, kgegpa()+40] [flags: 0x0, count: 1]
Exception [type: SIGSEGV, Address not mapped to object] [ADDR:0x79C8DBF3] [PC:0x229596B, kgebse()+279] [flags: 0x2, count: 2]
Exception [type: SIGSEGV, Address not mapped to object] [ADDR:0x79C8DBF3] [PC:0x229596B, kgebse()+279] [flags: 0x2, count: 2]
Mon Nov 10 22:40:21 2014
Doing block recovery for file 10 block 3395
Trace dumping is performing id=[cdmp_20141110224022]
Mon Nov 10 22:40:23 2014
Simulated error on redo application.
Mon Nov 10 22:40:24 2014
PMON (ospid: 3721): terminating the instance due to error 474
Instance terminated by PMON, pid = 3721
SYS@orcl11g>select file#,name from v$datafile;
FILE# NAME
---------- ------------------------------------------------------------
1 /opt/oracle/oradata/orcl11g/system01.dbf
2 /opt/oracle/oradata/orcl11g/sysaux01.dbf
3 /opt/oracle/oradata/orcl11g/undotbs01.dbf
4 /opt/oracle/oradata/orcl11g/users01.dbf
5 /opt/oracle/oradata/zbdba.dbf
7 /opt/oracle/oradata/orcl11g/test.dbf
8 /opt/oracle/oradata/orcl11g/test_size.dbf
9 /opt/oracle/oradata/orcl11g/test_size2.dbf
10 /opt/oracle/oradata/orcl11g/undotb02.dbf
在初始化参数中加入：
event='10061 trace name context forever, level 10'
_smon_internal_errlimit=1000000
再次启动数据库：
SYS@orcl11g>alter database open;
alter database open
*
ERROR at line 1:
ORA-00600: internal error code, arguments: [4194], [0x000000011], [0x000000000], [], [], [], [], [], [], [], [], []
SYS@orcl11g>
SYS@orcl11g>
SYS@orcl11g>
SYS@orcl11g>select open_mode from v$database;
OPEN_MODE
----------------------------------------
READ WRITE
这时候我们重建undo表空间，问题解决。
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