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标题：Patch_SCN快速修复ORA-01555数据库open故障

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

有一个朋友在线把数据文件拷贝走,然后发现异常又拷贝回来,结果再重启库发现数据库无法正常启动,尝试强制拉库

SQL> recover database using backup controlfile until cancel;
ORA-00279: change 1046834263 generated at 07/24/2026 22:04:11 needed for thread
1
ORA-00289: suggestion : /data02/archivelog/reybtstg/1_1755_1147617488.dbf
ORA-00280: change 1046834263 for thread 1 is in sequence #1755


Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
cancel
ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below
ORA-01152: file 1 was not restored from a sufficiently old backup
ORA-01110: data file 1: '/u01/app/oracle/oradata/reybtstg/system01.dbf'

SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00704: bootstrap process failure
ORA-00704: bootstrap process failure
ORA-00604: error occurred at recursive SQL level 1
ORA-01555: snapshot too old: rollback segment number 10 with name
"_SYSSMU10_1197734989$" too small
Process ID: 298308
Session ID: 613 Serial number: 3

alert日志报错信息

ARC0: STARTING ARCH PROCESSES COMPLETE
Thread 1 opened at log sequence 1
  Current log# 1 seq# 1 mem# 0: /data02/reybtstg/oradata/redo01.log
Successful open of redo thread 1
MTTR advisory is disabled because FAST_START_MTTR_TARGET is not set
Sat Jul 25 14:15:34 2026
SMON: enabling cache recovery
ORA-01555 caused by SQL statement below (SQL ID: 4krwuz0ctqxdt, SCN: 0x0000.3e656c5d):
select ctime, mtime, stime from obj$ where obj# = :1
Errors in file /u01/app/oracle/diag/rdbms/reybtstg/reybtstg/trace/reybtstg_ora_298308.trc:
ORA-00704: bootstrap process failure
ORA-00704: bootstrap process failure
ORA-00604: error occurred at recursive SQL level 1
ORA-01555: snapshot too old: rollback segment number 10 with name "_SYSSMU10_1197734989$" too small
Errors in file /u01/app/oracle/diag/rdbms/reybtstg/reybtstg/trace/reybtstg_ora_298308.trc:
ORA-00704: bootstrap process failure
ORA-00704: bootstrap process failure
ORA-00604: error occurred at recursive SQL level 1
ORA-01555: snapshot too old: rollback segment number 10 with name "_SYSSMU10_1197734989$" too small
Error 704 happened during db open, shutting down database
USER (ospid: 298308): terminating the instance due to error 704
Instance terminated by USER, pid = 298308
ORA-1092 signalled during: alter database open resetlogs...
opiodr aborting process unknown ospid (298308) as a result of ORA-1092
Sat Jul 25 14:15:35 2026
ORA-1092 : opitsk aborting process

这个错误比较好处理只要修改Oracle scn即可,使用Patch_SCN for Linux进行修改

---会话1
[oracle@xff ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Sat Jul 25 14:21:11 2026

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup nomount pfile='/tmp/pfile';
ORACLE instance started.

Total System Global Area 6.4137E+10 bytes
Fixed Size		    2269072 bytes
Variable Size		 1.5569E+10 bytes
Database Buffers	 4.8318E+10 bytes
Redo Buffers		  246980608 bytes
SQL> @/tmp/rectl

Control file created.

---会话2
[oracle@xff tmp]$ ./Patch_SCN -h
Usage:
  Software License:       ./Patch_SCN -key
  Get Oracle SPID:        ./Patch_SCN -spid
  Get SCN address:        ./Patch_SCN -addr
  Automatic address mode: ./Patch_SCN <spid> <new_value>
  Manual address mode:    ./Patch_SCN <spid> <address> <new_value>
  Where:
    <spid> - Oracle process ID
    <address> - Memory address (hexadecimal)
    <new_value> - SCN value to modify (decimal or hexadecimal)
[oracle@xff tmp]$ ./Patch_SCN -spid

Found 3 Oracle LOCAL=YES processes: 283668  283670  305036  

Process Details:
UID        PID  PPID  C STIME TTY          TIME CMD
oracle   283668 283627  0 Jul18 ?        00:15:10 oracletesta (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oracle   283670 283627  0 Jul18 ?        00:35:25 oracletesta (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oracle   305036 304678  0 14:21 ?        00:00:00 oracleorcltg (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
[oracle@xff tmp]$ ./Patch_SCN 305036 1146834263
Successfully obtained address automatically: 0x6001ae70
Original Oracle SCN at Address 0x6001ae70: 0x0
Are you sure you want to modify Oracle SCN? (yes/no): yes
New SCN at Address 0x6001ae70: 0x445b4d57
Oracle SCN successfully modified.

数据库正常打开

----会话1
SQL> recover database;
Media recovery complete.
SQL> alter database open ;

Database altered.

SQL> 

完成本次数据库恢复工作.