朋友的庫啟動的時候出現ORA-600[4194]/[4193]錯誤

Tue Feb 14 09:34:11 2012 Errors in file d:\oracle\product\10.2.0\admin\interlib\bdump\interlib_smon_2784.trc: ORA-01595: error freeing extent (2) of rollback segment (3)) ORA-00607: Internal error occurred while making a change to a data block ORA-00600: internal error code, arguments: [4194], [6], [30], [], [], [], [], [] Tue Feb 14 09:35:34 2012 Errors in file d:\oracle\product\10.2.0\admin\interlib\udump\interlib_ora_2824.trc: ORA-00603: ORACLE server session terminated by fatal error ORA-00600: internal error code, arguments: [4193], [2005], [2008], [], [], [], [], [] ORA-00600: internal error code, arguments: [4193], [2005], [2008], [], [], [], [], [] Tue Feb 14 09:36:30 2012 DEBUG: Replaying xcb 0x1fa24174, pmd 0x1fba06d4 for failed op 8 Doing block recovery for file 2 block 177 No block recovery was needed Tue Feb 14 09:37:30 2012 Errors in file d:\oracle\product\10.2.0\admin\interlib\bdump\interlib_pmon_2732.trc: ORA-00600: internal error code, arguments: [4193], [2005], [2008], [], [], [], [], [] Tue Feb 14 09:37:31 2012 Errors in file d:\oracle\product\10.2.0\admin\interlib\bdump\interlib_pmon_2732.trc: ORA-00600: internal error code, arguments: [4193], [2005], [2008], [], [], [], [], []

從這里可以看到出現了ORA-600[4194]/[4193]，第一感覺就是undo出現問題。
4193：表示undo和redo不一致（Arg [a] Undo record seq number，Arg [b] Redo record seq number ）；
4194：表示也是undo和redo不一致（Arg [a] Maximum Undo record number in Undo block，Arg [b] Undo record number from Redo block）
至于為什么有時候會只出現其中一個，我不太清楚，求答案

直接設置了下面參數，數據庫就意外的open成功，這位朋友比較幸運

undo_tablespace=SYSTEM undo_management=MANUAL

既然庫已經open，然后新建undo空間，刪除出問題的undo，做如下修改，數據庫恢復完成

undo_tablespace=新undo undo_management=AUTO

如果出現極端的情況可能需要做如下處理:
1.使用_offline_rollback_segments和_corrupted_rollback_segments屏蔽掉有問題的undo segment
2.繼續可能出現ora-600[2662]，需要推進scn

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