如何解决Ora-600 4193错误

记得在前文说过出现ora-600 2662问题,在解决oracle_diagnostics_howto_deal_2662_error.html">2662错误之后，经常会出现Ora-00600 4193错误，经常可以在alert文件中看到的错误号类似:

Fri Dec 16 22:37:27 2005
Errors in file /opt/oracle/admin/conner/bdump/conner_smon_22817.trc:
ORA-00604: error occurred at recursive SQL level 1
ORA-00607: Internal error occurred while making a change to a data block
ORA-00600: internal error code, arguments: [4193], [1171], [1187], [], [], [], [], []
Fri Dec 16 23:28:40 2005
Errors in file /opt/oracle/admin/conner/bdump/conner_smon_22817.trc:
ORA-00600: internal error code, arguments: [4193], [1171], [1187], [], [], [], [], []

4193错误通常是因为恢复时redo与undo不一致所导致。

Oracle的解释如下:

While backing out an undo record (i.e. at the time of rollback) we found a transaction id mis-match indicating either a corruption in the rollback segment or corruption in an object which the rollback segment is trying to apply undo records on.

This would indicate a corrupted rollback segment.

检查具体的Trace文件，可以发现类似如下错误：

*** 2005-12-16 20:54:53.496
ksedmp: internal or fatal error
ORA-00600: internal error code, arguments: [4193], [1171], [1187], [], [], [], [], []
Current SQL statement for this session:
UPDATE SMON_SCN_TIME SET SCN_WRP=:1, SCN_BAS=:2, TIME_MP=:3, TIME_DP=:4 
WHERE TIME_MP = :5  AND   THREAD = :6  AND   ROWNUM <= 1

由于是UNDO存在不一致，可以通过oracle_howto_shrink_undo_tablespace.html">重建UNDO表空间来解决:

SQL> create undo tablespace undotbs2 
   2 datafile '/opt/oracle/oradata/conner/undotbs2.dbf' size 10m;

Tablespace created.

SQL> alter system set undo_tablespace=undotbs2 scope=both;

System altered.

SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup
ORACLE instance started.

Total System Global Area  114365800 bytes
Fixed Size                   451944 bytes
Variable Size              50331648 bytes
Database Buffers           62914560 bytes
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Redo Buffers                 667648 bytes
Database mounted.
Database opened.
SQL> show parameter undo

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
undo_management                      string      AUTO
undo_retention                       integer     10800
undo_suppress_errors                 boolean     FALSE
undo_tablespace                      string      UNDOTBS2

 					  
					

										
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