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1.alert日志
Tue Dec 20 22:09:45 2011 Errors in file /opt/app/oracle/admin/BAS/bdump/bas_m000_27442.trc: Wed Dec 21 22:10:45 2011 Errors in file /opt/app/oracle/admin/BAS/bdump/bas_m000_32761.trc: Thu Dec 22 22:11:46 2011 Errors in file /opt/app/oracle/admin/BAS/bdump/bas_m000_5935.trc: Fri Dec 23 22:12:47 2011 Errors in file /opt/app/oracle/admin/BAS/bdump/bas_m000_11382.trc:
Mnnn performs manageability tasks dispatched to them by MMON. Tasks performed include taking Automatic Workload Repository snapshots and Automatic Database Diagnostic Monitor analysis.
从这个时间点来看，应该是数据库启动GATHER_STATS_JOB收集统计信息时发现这个错误。
2.bas_m000_11382.trc
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production With the Partitioning, OLAP and Data Mining options ORACLE_HOME = /opt/app/oracle/product/10.2.0/db_1 System name: Linux Node name: bas Release: 2.6.9-78.ELsmp Version: #1 SMP Wed Jul 9 15:46:26 EDT 2008 Machine: x86_64 Instance name: BAS Redo thread mounted by this instance: 1 Oracle process number: 24 Unix process pid: 11382, image: oracle@bas (m000) *** ACTION NAME:(Auto-Purge Slave Action) 2011-12-23 22:12:47.074 *** MODULE NAME:(MMON_SLAVE) 2011-12-23 22:12:47.074 *** SERVICE NAME:(SYS$BACKGROUND) 2011-12-23 22:12:47.074 *** SESSION ID:(5465.2033) 2011-12-23 22:12:47.074 oer 8102.2 - obj# 4152, rdba: 0x00401f7c(afn 1, blk# 8060) kdk key 8102.2: ncol: 2, len: 10 key: (10): 02 c1 0a 06 00 c0 04 dc 00 00 mask: (4096): 09 00 00 00 00 fb d1 c0 00 00 00 00 00 70 f8 fe bf 7f 00 00 00 cd 7d 5d 01
oer 8102.<code> - obj# <object id>, rdba: <rdba value>(afn <file#>, blk# <block#>) kdk key 8102.2: ncol: <number of columns in the key including the rowid>, len: <key length> key: (<length>):<hexadecimal value> obj#: object_id for the affected index in dba_objects. rdba: relative data block address where the key is supposed to be stored in the index. afn: absolute file number where the affected index block is stored. (file_id in dba_data_files, file# in v$datafile). blk#: Index block number where the key is supposed to be stored.
出现oer 8102.2的错误，有两种可能:1.坏块,2.表和索引数据不一致
3.找出相关对象
SQL> col object_name for a30 SQL> col owner for a10 SQL> select object_name,owner,object_type 2 from dba_objects where object_id=4152; OBJECT_NAME OWNER OBJECT_TYPE ------------------------------ ---------- ------------------- WRI$_SEGADV_OBJLIST_IDX_TS SYS INDEX SQL> select OWNER,TABLE_NAME from dba_indexes 2 where index_name='WRI$_SEGADV_OBJLIST_IDX_TS'; OWNER TABLE_NAME ---------- ------------------------------ SYS WRI$_SEGADV_OBJLIST SQL> ANALYZE TABLE sys.WRI$_SEGADV_OBJLIST VALIDATE STRUCTURE CASCADE; ANALYZE TABLE sys.WRI$_SEGADV_OBJLIST VALIDATE STRUCTURE CASCADE * ERROR at line 1: ORA-01499: table/index cross reference failure - see trace file
4.分析坏块(逻辑/物理)
SQL> ANALYZE INDEX WRI$_SEGADV_OBJLIST_IDX_TS VALIDATE STRUCTURE; Index analyzed. SQL> ANALYZE TABLE WRI$_SEGADV_OBJLIST VALIDATE STRUCTURE; Table analyzed. [oracle@bas bdump]$ dbv file=/opt/app/oracle/oradata/BAS/system01.dbf DBVERIFY: Release 10.2.0.1.0 - Production on Sat Dec 24 21:14:38 2011 Copyright (c) 1982, 2005, Oracle. All rights reserved. DBVERIFY - Verification starting : FILE = /opt/app/oracle/oradata/BAS/system01.dbf DBVERIFY - Verification complete Total Pages Examined : 552960 Total Pages Processed (Data) : 360156 Total Pages Failing (Data) : 0 Total Pages Processed (Index): 167596 Total Pages Failing (Index): 0 Total Pages Processed (Other): 1961 Total Pages Processed (Seg) : 0 Total Pages Failing (Seg) : 0 Total Pages Empty : 23247 Total Pages Marked Corrupt : 0 Total Pages Influx : 0 Highest block SCN : 2890198330 (2750.2890198330)
检测证明，对象以及对象所属的数据文件，无坏块现象
5.分析表和index不一致
--找出index对应列
SQL> SELECT table_name , column_name from dba_ind_columns
2 WHERE index_name='WRI$_SEGADV_OBJLIST_IDX_TS' order by table_name;
TABLE_NAME COLUMN_NAME
------------------------------ --------------------
WRI$_SEGADV_OBJLIST TS_ID
--确定对应列是否允许为null
SQL> desc WRI$_SEGADV_OBJLIST
Name Null? Type
----------------------------------------- -------- ----------------------------
AUTO_TASKID NUMBER
TS_ID NUMBER
OBJN NUMBER
OBJD NUMBER
STATUS VARCHAR2(40)
TASK_ID NUMBER
REASON VARCHAR2(40)
REASON_VALUE NUMBER
CREATION_TIME TIMESTAMP(6)
PROC_TASKID NUMBER
END_TIME TIMESTAMP(6)
SEGMENT_OWNER VARCHAR2(30)
SEGMENT_NAME VARCHAR2(81)
PARTITION_NAME VARCHAR2(30)
SEGMENT_TYPE VARCHAR2(18)
TABLESPACE_NAME VARCHAR2(30)
--确认在表中对应列是否有空值
SQL> SELECT /*+ FULL(t1) */ count(TS_ID)
2 FROM WRI$_SEGADV_OBJLIST t1
3 WHERE t1.TS_ID IS NULL;
COUNT(TS_ID)
------------
0
--表比index多数据
SQL> SELECT /*+ FULL(t1) */ TS_ID
2 FROM WRI$_SEGADV_OBJLIST t1
3 MINUS
4 SELECT /*+ index(t WRI$_SEGADV_OBJLIST_IDX_TS) */ TS_ID
5 FROM WRI$_SEGADV_OBJLIST t where ts_id is not null;
no rows selected
--index中数据条数
SQL> SELECT /*+ index(t WRI$_SEGADV_OBJLIST_IDX_TS) */ count(TS_ID)
2 FROM WRI$_SEGADV_OBJLIST t
3 where ts_id is not null;
COUNT(TS_ID)
------------
901
--表中数据条数
SQL> SELECT /*+ FULL(t1) */ count(TS_ID)
2 FROM WRI$_SEGADV_OBJLIST t1 ;
COUNT(TS_ID)
------------
937
--index中不同值数量
SQL> SELECT /*+ index(t WRI$_SEGADV_OBJLIST_IDX_TS) */
2 COUNT(DISTINCT TS_ID)
3 FROM WRI$_SEGADV_OBJLIST t WHERE TS_ID IS NOT NULL;
COUNT(DISTINCTTS_ID)
--------------------
5
--表中不同值数量
SQL> SELECT /*+ index(t WRI$_SEGADV_OBJLIST_IDX_TS) */ TS_ID
2 FROM WRI$_SEGADV_OBJLIST t WHERE ts_id IS NOT NULL
3 MINUS
4 SELECT /*+ FULL(t1) */ TS_ID
5 FROM WRI$_SEGADV_OBJLIST t1 ;
TS_ID
----------
4
--对比可以知道index中的唯一值比表中，这个也就解释了，为什么表中总条数多，
--但是他们两做减法的时候，记录为空
--索引表比表多数据
SQL> SELECT /*+ index(t WRI$_SEGADV_OBJLIST_IDX_TS) */ TS_ID
2 FROM WRI$_SEGADV_OBJLIST t WHERE ts_id IS NOT NULL
3 MINUS
4 SELECT /*+ FULL(t1) */ TS_ID
5 FROM WRI$_SEGADV_OBJLIST t1 ;
TS_ID
----------
4
上面的检测证明:1.表中有索引中无的数据,2.索引中有表中不存在数据
6.解决问题
SQL> alter index WRI$_SEGADV_OBJLIST_IDX_TS rebuild online;
Index altered.
--测试index中总条数
SQL> SELECT /*+ index(t WRI$_SEGADV_OBJLIST_IDX_TS) */ count(TS_ID)
2 FROM WRI$_SEGADV_OBJLIST t
3 where ts_id is not null;
COUNT(TS_ID)
------------
937
--无多余index项(以前唯一值为4的记录已经不存在)
SQL> SELECT /*+ index(t WRI$_SEGADV_OBJLIST_IDX_TS) */ TS_ID
2 FROM WRI$_SEGADV_OBJLIST t WHERE ts_id IS NOT NULL
3 MINUS
4 SELECT /*+ FULL(t1) */ TS_ID
5 FROM WRI$_SEGADV_OBJLIST t1 ;
no rows selected
--通过上述测试，证明表和index不一致问题解决