因误删undo数据文件，启动数据库报错
| SQL> startup ORACLE instance started. Total System Global Area 1152450560 bytes Fixed Size 2252584 bytes Variable Size 956301528 bytes Database Buffers 184549376 bytes Redo Buffers 9347072 bytes Database mounted. ORA-01157: cannot identify/lock data file 3 - see DBWR trace file ORA-01110: data file 3: '/u01/app/oracle/oradata/SYD/datafile/o1_mf_undotbs1_cvdwnl7t_.dbf' SQL> select open_mode from v$database; OPEN_MODE -------------------- MOUNTED SQL> alter database datafile '/u01/app/oracle/oradata/SYD/datafile/o1_mf_undotbs1_cvdwnl7t_.dbf' offline; （归档模式） alter database datafile '/u01/app/oracle/oradata/SYD/datafile/o1_mf_undotbs1_cvdwnl7t_.dbf' offline * ERROR at line 1: ORA-01145: offline immediate disallowed unless media recovery enabled SQL> archive log list Database log mode No Archive Mode Automatic archival Disabled Archive destination /u01/app/oracle/product/11.2.0/dbhome_1/dbs/arch Oldest online log sequence 35 Current log sequence 37 SQL> alter database datafile '/u01/app/oracle/oradata/SYD/datafile/o1_mf_undotbs1_cvdwnl7t_.dbf' offline drop;（非归档） Database altered. SQL> alter database open ; Database altered. SQL> show parameter undo NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ undo_management string AUTO undo_retention integer 900 undo_tablespace string UNDOTBS1 SQL> CREATE UNDO TABLESPACE "UNDOTBS2" DATAFILE '/u01/app/oracle/oradata/SYD/datafile/undotbs01' SIZE 10m autoextend on; Tablespace created. SQL> alter system set undo_tablespace=UNDOTBS2 scope=both; System altered. SQL> show parameter undo NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ undo_management string AUTO undo_retention integer 900 undo_tablespace string UNDOTBS2 SQL> drop tablespace undotbs1 including contents and datafiles; drop tablespace undotbs1 including contents and datafiles * ERROR at line 1: ORA-01548: active rollback segment '_SYSSMU1_3724004606$' found, terminate dropping tablespace SQL> select SEGMENT_NAME,TABLESPACE_NAME,STATUS from dba_rollback_segs; SEGMENT_NAME TABLESPACE_NAME STATUS ------------------------------ ------------------------- ---------------- SYSTEM SYSTEM ONLINE _SYSSMU10_1197734989$ UNDOTBS1 NEEDS RECOVERY _SYSSMU9_1650507775$ UNDOTBS1 NEEDS RECOVERY _SYSSMU8_517538920$ UNDOTBS1 NEEDS RECOVERY _SYSSMU7_2070203016$ UNDOTBS1 NEEDS RECOVERY _SYSSMU6_1263032392$ UNDOTBS1 NEEDS RECOVERY _SYSSMU5_898567397$ UNDOTBS1 NEEDS RECOVERY _SYSSMU4_1254879796$ UNDOTBS1 NEEDS RECOVERY _SYSSMU3_1723003836$ UNDOTBS1 NEEDS RECOVERY _SYSSMU2_2996391332$ UNDOTBS1 NEEDS RECOVERY _SYSSMU1_3724004606$ UNDOTBS1 NEEDS RECOVERY _SYSSMU20_4055497039$ UNDOTBS2 ONLINE _SYSSMU19_939638859$ UNDOTBS2 ONLINE _SYSSMU18_2091397745$ UNDOTBS2 ONLINE _SYSSMU17_3633325321$ UNDOTBS2 ONLINE _SYSSMU16_1545911387$ UNDOTBS2 ONLINE _SYSSMU15_3486956598$ UNDOTBS2 ONLINE _SYSSMU14_336203531$ UNDOTBS2 ONLINE _SYSSMU13_1164891431$ UNDOTBS2 ONLINE _SYSSMU12_2252700889$ UNDOTBS2 ONLINE _SYSSMU11_767382873$ UNDOTBS2 ONLINE 21 rows selected. |
将以上查询到的回滚段信息填入参数文件_CORRUPTED_ROLLBACK_SEGMENTS（跳过回滚段恢复）
| [oracle@dj dbs]$ vi initsyd.ora syd.__db_cache_size=754974720 syd.__java_pool_size=16777216 syd.__large_pool_size=33554432 syd.__oracle_base='/u01/app/oracle'#ORACLE_BASE set from environment syd.__pga_aggregate_target=301989888 syd.__sga_target=1157627904 syd.__shared_io_pool_size=0 syd.__shared_pool_size=335544320 syd.__streams_pool_size=0 *.audit_file_dest='/u01/app/oracle/admin/syd/adump' *.audit_trail='db' *.compatible='11.2.0.4.0' *.control_files='/u01/app/oracle/oradata/SYD/controlfile/o1_mf_cvdwphpf_.ctl' *.db_block_size=8192 *.db_create_file_dest='/u01/app/oracle/oradata' *.db_domain='' *.db_name='syd' *.diagnostic_dest='/u01/app/oracle' *.dispatchers='(PROTOCOL=TCP) (SERVICE=sydXDB)' *.open_cursors=300 *.pga_aggregate_target=288358400 *.processes=1500 *.remote_login_passwordfile='EXCLUSIVE' *.sessions=1655 *.sga_target=1153433600 *.undo_tablespace='UNDOTBS2' _CORRUPTED_ROLLBACK_SEGMENTS=(_SYSSMU10_1197734989$,_SYSSMU9_1650507775$,_SYSSMU8_517538920$,_SYSSMU7_2070203016$,_SYSSMU6_1263032392$,_SYSSMU5_898567397$,_SYSSMU4_1254879796$,_SYSSMU3_1723003836$,_SYSSMU2_2996391332$,_SYSSMU1_3724004606$) SQL> shu immediate Database closed. Database dismounted. ORACLE instance shut down. SQL> exit SQL> startup pfile='/u01/app/oracle/product/11.2.0/dbhome_1/dbs/initsyd.ora'; ORACLE instance started. Total System Global Area 1152450560 bytes Fixed Size 2252584 bytes Variable Size 956301528 bytes Database Buffers 184549376 bytes Redo Buffers 9347072 bytes Database mounted. Database opened. SQL> drop tablespace undotbs1 including contents and datafiles; Tablespace dropped. SQL> shu immediate Database closed. Database dismounted. ORACLE instance shut down. SQL> exit Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options [oracle@dj ~]$ sqlplus / as sysdba SQL*Plus: Release 11.2.0.4.0 Production on Sat Jun 2 19:17:20 2018 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to an idle instance. SQL> startup ORACLE instance started. Total System Global Area 1152450560 bytes Fixed Size 2252584 bytes Variable Size 956301528 bytes Database Buffers 184549376 bytes Redo Buffers 9347072 bytes Database mounted. Database opened. SQL> |