有时候我们遇到如下错误：
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00600: internal error code, arguments: [2662], [0], [5685940], [0], [5685970], [4194432], [], [], [], [], [], []
Process ID: 3157
Session ID: 1 Serial number: 3
我们可以通过bbed修改对应的数据文件头来解决，也可以通过推进scn来解决：
alter session set events 'IMMEDIATE trace name ADJUST_SCN level 1';
也可以使用oradebug来推进：
SYS@orcl11g>oradebug setmypid
Statement processed.
SYS@orcl11g>
SYS@orcl11g>
SYS@orcl11g>oradebug dumpvar sga kcsgscn_
kcslf kcsgscn_ [060017F58, 060017F88) = 005711D8 00000000 00000000 00000000 000000B5 00000000 00000000 00000000 00000000 00000000 60017C38 00000000
SYS@orcl11g>oradebug poke 0x060017F58 4 0x40000000
BEFORE: [060017F58, 060017F5C) = 005711DD
AFTER: [060017F58, 060017F5C) = 40000000
SYS@orcl11g>oradebug dumpvar sga kcsgscn_
kcslf kcsgscn_ [060017F58, 060017F88) = 40000002 00000000 00000000 00000000 000000BC 00000000 00000000 00000000 00000000 00000000 60017C38 00000000
SYS@orcl11g>
SYS@orcl11g>
SYS@orcl11g>select dbms_flashback.get_system_change_number a from dual;
A
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1073741827