一个817数据库报ORA-600 4194 无法正常启动

Fri Jul 25 10:49:47 2014

Database mounted in Exclusive Mode.

Completed: ALTER DATABASE MOUNT

Fri Jul 25 10:49:58 2014

ALTER DATABASE RECOVER database

Fri Jul 25 10:49:58 2014

Media Recovery Start

Media Recovery Log

Recovery of Online Redo Log: Thread 1 Group 2 Seq 3320 Reading mem 0

Mem# 0 errs 0: D:\ORACLE\ORADATA\ORCL\REDO02.LOG

Media Recovery Complete

Completed: ALTER DATABASE RECOVER database

Fri Jul 25 10:50:09 2014

alter database open

Beginning crash recovery of 1 threads

Fri Jul 25 10:50:09 2014

Thread recovery: start rolling forward thread 1

Recovery of Online Redo Log: Thread 1 Group 2 Seq 3320 Reading mem 0

Mem# 0 errs 0: D:\ORACLE\ORADATA\ORCL\REDO02.LOG

Fri Jul 25 10:50:09 2014

Thread recovery: finish rolling forward thread 1

Thread recovery: 0 data blocks read, 0 data blocks written, 3 redo blocks read

Crash recovery completed successfully

Fri Jul 25 10:50:09 2014

Thread 1 advanced to log sequence 3321

Thread 1 opened at log sequence 3321

Current log# 3 seq# 3321 mem# 0: D:\ORACLE\ORADATA\ORCL\REDO01.LOG

Successful open of redo thread 1.

Fri Jul 25 10:50:09 2014

SMON: enabling cache recovery

Fri Jul 25 10:50:10 2014

Errors in file D:\oracle\admin\ORCL\udump\ORA03216.TRC:

ORA-00600: ??????????: [4194], [12], [37], [], [], [], [], []

Fri Jul 25 10:50:10 2014

Recovery of Online Redo Log: Thread 1 Group 3 Seq 3321 Reading mem 0

Mem# 0 errs 0: D:\ORACLE\ORADATA\ORCL\REDO01.LOG

Fri Jul 25 10:50:10 2014

SMON: disabling cache recovery

Fri Jul 25 10:50:10 2014

ORA-600 signalled during: alter database open

ORA-600 4194这个错误在数据库异常恢复中非常常见，因为库不是很重要,因此就是直接屏蔽掉故障回滚段,然后强制拉库,该库的恢复过程中,也直接使用隐含参数屏蔽回滚段

_corrupted_rollback_segments= RBS0, RBS1, RBS2, RBS3, RBS4, RBS5, RBS6, RBS_HDSYS,数据库依然无法open,进一步分析trace文件

Fri Jul 25 11:26:07 2014

ORACLE V8.1.7.0.0 - Production vsnsta=0

vsnsql=e vsnxtr=3

Windows 2000 Version 5.2 Service Pack 2, CPU type 586

Oracle8i Release 8.1.7.0.0 - Production

JServer Release 8.1.7.0.0 - Production

Windows 2000 Version 5.2 Service Pack 2, CPU type 586

Instance name: orcl

Redo thread mounted by this instance: 1

Oracle process number: 14

Windows thread id: 3648, image: ORACLE.EXE

*** SESSION ID:(11.1) 2014-07-25 11:26:07.843

*** 2014-07-25 11:26:07.843

ksedmp: internal or fatal error

ORA-00600: ??????????: [4194], [12], [37], [], [], [], [], []

Current SQL statement for this session:

update undo$ set name=:2,file#=:3,block#=:4,status$=:5,user#=:6,undosqn=:7,xactsqn=:8,

scnbas=:9,scnwrp=:10,inst#=:11,ts#=:12 where us#=:1

----- Call Stack Trace -----

这里很明显看出来，数据库是在open过程中，update undo$表遭遇到ORA-600 4194,因为该过程需要使用系统回滚段，但是由于其所对应的undo和redo信息不一致，所以无法正常启动数据库.继续读trace文件

Extent Control Header

-----------------------------------------------------------------

Extent Header:: spare1: 0 space2: 0 #extents: 5 #blocks: 49

last map 0x00000000 #maps: 0 offset: 4128

Highwater:: 0x00400006 ext#: 0 blk#: 3 ext size: 9

#blocks in seg. hdr's freelists: 0

#blocks below: 0

mapblk 0x00000000 offset: 0

Unlocked

Map Header:: next 0x00000000 #extents: 5 obj#: 0 flag: 0x40000000

Extent Map

-----------------------------------------------------------------

0x00400003 length: 9

0x0040000c length: 10

0x0040008f length: 10

0x00400099 length: 10

0x004000a3 length: 10

TRN CTL:: seq: 0x003c chd: 0x004e ctl: 0x0050 inc: 0x00000000 nfb: 0x0000

mgc: 0x8002 xts: 0x0068 flg: 0x0001 opt: 2147483646 (0x7ffffffe)

uba: 0x00400006.003c.25 scn: 0x0000.009a4009

Version: 0x01

FREE BLOCK POOL::

uba: 0x00000000.003c.24 ext: 0x0 spc: 0x196

uba: 0x00000000.001f.14 ext: 0x1 spc: 0x16f6

uba: 0x00000000.0018.02 ext: 0x4 spc: 0x1f1a

uba: 0x00000000.0000.00 ext: 0x0 spc: 0x0

uba: 0x00000000.0000.00 ext: 0x0 spc: 0x0

TRN TBL::

通过这里可以看出来,数据库在启动的时候，使用system undo的block为为0×00400006,使用bbed清除掉该uba记录,让数据库启动的时候重新分配system undo block给数据库执行update undo$使用,数据库open成功

BBED> m /x 0x00000000

File: D:\ORACLE\ORADATA\ORCL\SYSTEM01.DBF (0)

Block: 2 Offsets: 4188 to 4192 Dba:0x00000000

------------------------------------------------------------------------

00000000 3c002400 00009601 00000000 1f001400 0100f616 00000000 18000200

BBED> m /x 0x0000

File: D:\ORACLE\ORADATA\ORCL\SYSTEM01.DBF (0)

Block: 2 Offsets: 4028 to 4032 Dba:0x00000000

------------------------------------------------------------------------

00000000 00000000 3c005000 02800100 68000000 feffff7f 06004000 3c002400

Sat Jul 26 12:09:21 2014

Thread recovery: start rolling forward thread 1

Recovery of Online Redo Log: Thread 1 Group 2 Seq 3326 Reading mem 0

Mem# 0 errs 0: D:\ORACLE\ORADATA\ORCL\REDO02.LOG

Sat Jul 26 12:09:21 2014

Thread recovery: finish rolling forward thread 1

Thread recovery: 0 data blocks read, 0 data blocks written, 3 redo blocks read

Crash recovery completed successfully

Sat Jul 26 12:09:22 2014

Thread 1 advanced to log sequence 3327

Thread 1 opened at log sequence 3327

Current log# 3 seq# 3327 mem# 0: D:\ORACLE\ORADATA\ORCL\REDO01.LOG

Successful open of redo thread 1.

Sat Jul 26 12:09:22 2014

SMON: enabling cache recovery

SMON: enabling tx recovery

Sat Jul 26 12:09:39 2014

Completed: alter database open