一. undo 的一些准备知识
在之前的blog里有对undo segment 有说明：
1.1 当undo_management被设置成MENUAL时使用系统回滚段, 即将undo records 记录到SYSTEM 表空间下的SYSTEM段。
SQL> col segment_name format a10
SQL> select segment_name,tablespace_name,bytes,next_extent from dba_segments where segment_type='ROLLBACK';
SEGMENT_NATABLESPACE_NAME BYTES NEXT_EXTENT
---------- ---------------------------------------- -----------
SYSTEM SYSTEM 393216 1048576
通过上面的这条语句，我们查到了这个用于rollback 的system segment 存在与system 表空间。 默认情况下，只有一个segment，并且它还比较小，所以，如果使用system 段来存储undo records。肯定会影响数据库的性能。 所以Oracle 是建议使用Undo tablespace 来管理undo records。
1.2 当undo_management设置成AUTO时使用UNDOtablespace来管理回滚段。 这个时候，我们将有多个undo segment，并且这些segment 是存放在UNDO 表空间里的。 这样对DB的性能就会提高。
SYS@anqing2(rac2)> select segment_name,tablespace_name, header_file, header_block,bytes from dba_segments where segment_type='TYPE2 UNDO';
SEGMENT_NAME TABLESPACE_NAME HEADER_FILEHEADER_BLOCK BYTES
--------------- --------------- ----------------------- ----------
_SYSSMU1$ UNDOTBS1 2 9 107806720
_SYSSMU2$ UNDOTBS1 2 25 111411200
_SYSSMU3$ UNDOTBS1 2 41 120586240
_SYSSMU4$ UNDOTBS1 2 57 100990976
_SYSSMU5$ UNDOTBS1 2 73 112721920
_SYSSMU6$ UNDOTBS1 2 89 117243904
_SYSSMU7$ UNDOTBS1 2 105 106233856
_SYSSMU8$ UNDOTBS1 2 121 155975680
_SYSSMU9$ UNDOTBS1 2 137 184287232
_SYSSMU10$ UNDOTBS1 2 153 149356544
_SYSSMU11$ UNDOTBS2 5 9 131072
SEGMENT_NAME TABLESPACE_NAME HEADER_FILEHEADER_BLOCK BYTES
--------------- --------------- ----------------------- ----------
_SYSSMU12$ UNDOTBS2 5 25 131072
_SYSSMU13$ UNDOTBS2 5 41 131072
_SYSSMU14$ UNDOTBS2 5 57 131072
_SYSSMU15$ UNDOTBS2 5 73 131072
_SYSSMU16$ UNDOTBS2 5 89 131072
_SYSSMU17$ UNDOTBS2 5 105 131072
_SYSSMU18$ UNDOTBS2 5 121 131072
_SYSSMU19$ UNDOTBS2 5 137 131072
_SYSSMU20$ UNDOTBS2 5 153 131072
20 rows selected.
通过以上SQL的查询结果，我们可以看出，每个节点有10个undo segment来存放undo records。
以上我们是通过dba_segment 表查看的结果。 也可以通过v$rollstat和v$rollname 两个视图来查看信息。 这2个视图会显示所有rollback 段的信息。 包括system段和undo段。
SQL> col name format a15
SQL> select s.usn,n.name,s.extents,s.hwmsize,s.status from v$rollstat s, v$rollname n wheres.usn=n.usn;
USNNAME EXTENTS HWMSIZESTATUS
---------- --------------- -------------------- ---------------
0SYSTEM 6 385024ONLINE
1_SYSSMU1$ 3 7659520ONLINE
2_SYSSMU2$ 3 9691136ONLINE
3_SYSSMU3$ 4 7462912ONLINE
4_SYSSMU4$ 3 76668928ONLINE
5_SYSSMU5$ 4 8511488ONLINE
6_SYSSMU6$ 3 7462912ONLINE
7_SYSSMU7$ 3 33480704ONLINE
8_SYSSMU8$ 3 8577024ONLINE
9_SYSSMU9$ 3 7462912ONLINE
10_SYSSMU10$ 3 13754368ONLINE
11 rows selected.
1.3 查看事务当前使用的undo segment
可以通过v$transaction 视图来确认事务当前使用的undo segment信息。 确定undo segment之后，就可以进行相关的dump 操作。 关于v$transaction 视图的说明，参考官方文档：
部分说明如下：
| ADDR | RAW(4 | 8) | Address of the transaction state object |
| XIDUSN | NUMBER | Undo segment number |
| XIDSLOT | NUMBER | Slot number |
| XIDSQN | NUMBER | Sequence number |
| UBAFIL | NUMBER | Undo block address (UBA) filenum |
| UBABLK | NUMBER | UBA block number |
| UBASQN | NUMBER | UBA sequence number |
| UBAREC | NUMBER | UBA record number |
| STATUS | VARCHAR2(16) | Status |
--查看当前的SID信息
SYS@anqing2(rac2)> select sid fromv$mystat where rownum=1;
SID
----------
147
SYS@anqing2(rac2)> update ta set name='dave'where name='ora_rowscn';
474 rows updated.
--查看v$transaction中正在使用的回滚段号
SYS@anqing2(rac2)> selectxidusn,xidslot,xidsqn,ubablk,ubafil,ubarec from v$transaction;
XIDUSN XIDSLOT XIDSQN UBABLK UBAFIL UBAREC
---------- ---------- ---------- -------------------- ----------
11 23 1010 12 5 9
--xidusn：undo segment number
--xidslot：slot number
--xidsqn：sequence number
--ubafil：undo block address (uba) filenum
--ubablk：uba block number
--ubarec：UBA record number
其中UBA的格式为：DBA.seq#.rec#，关于UBA的这部分内容， 在我有关itl 的那篇blog里有说明：
--通过xidusn号和v$rollname确定正在使用的undo segment name
SYS@anqing2(rac2)> select usn,name from v$rollname where usn=11;
USN NAME
----------------------------------------
11 _SYSSMU11$
--commit之后，对应的事务信息就没有了。
SYS@anqing2(rac2)> commit;
Commit complete.
SYS@anqing2(rac2)> selectxidusn,xidslot,xidsqn,ubablk,ubafil,ubarec from v$transaction;
no rows selected
SYS@anqing2(rac2)>
二. Dump Undo 信息
2.1 dump undo header
在1.3节里已经做了一些测试，这里直接使用上面测试的结果。
SYS@anqing2(rac2)> alter system dump undo header '_SYSSMU11$';
System altered.
SYS@anqing2(rac2)> oradebug setmypid
Statement processed.
SYS@anqing2(rac2)> oradebug tracefile_name
/u01/app/oracle/admin/anqing/udump/anqing2_ora_3078.trc
[oracle@rac2 ~]$ cat /u01/app/oracle/admin/anqing/udump/anqing2_ora_3078.trc
/u01/app/oracle/admin/anqing/udump/anqing2_ora_3078.trc
Oracle Database 10g Enterprise EditionRelease 10.2.0.4.0 - Production
With the Partitioning, Real ApplicationClusters, OLAP, Data Mining
and Real Application Testing options
ORACLE_HOME =/u01/app/oracle/product/10.2.0/db_1
System name: Linux
Node name: rac2
Release: 2.6.18-194.el5
Version: #1 SMP Tue Mar 16 21:52:43 EDT 2010
Machine: i686
Instance name: anqing2
Redo thread mounted by this instance: 2
Oracle process number: 32
Unix process pid: 3078, image: oracle@rac2(TNS V1-V3)
*** 2011-08-09 13:56:10.376
*** ACTION NAME:() 2011-08-09 13:56:10.375
*** MODULE NAME:(sqlplus@rac2 (TNS V1-V3))2011-08-09 13:56:10.375
*** SERVICE NAME:(SYS$USERS) 2011-08-0913:56:10.375
*** SESSION ID:(135.38749) 2011-08-0913:56:10.375
********************************************************************************
Undo Segment: _SYSSMU11$ (11)
********************************************************************************
Extent Control Header
-----------------------------------------------------------------
Extent Header:: spare1: 0 spare2: 0 #extents: 2 #blocks: 15
last map 0x00000000 #maps: 0 offset: 4080
Highwater:: 0x0140000d ext#: 0 blk#: 3 ext size: 7
#blocks in seg. hdr's freelists: 0
#blocks below: 0
mapblk 0x00000000 offset: 0
Unlocked
Map Header:: next 0x00000000 #extents: 2 obj#: 0 flag: 0x40000000
Extent Map
-----------------------------------------------------------------
0x0140000a length: 7
0x01400041 length: 8
Retention Table
-----------------------------------------------------------
Extent Number:0 Commit Time: 1312867343
Extent Number:1 Commit Time: 1312867343
TRNCTL:: seq: 0x00c9 chd: 0x0016 ctl: 0x0024 inc: 0x00000000 nfb: 0x0002
mgc: 0x8201 xts: 0x0068 flg: 0x0001 opt: 2147483646 (0x7ffffffe)
uba: 0x0140000d.00c9.04 scn: 0x0000.0070e385
Version: 0x01
FREE BLOCK POOL::
uba: 0x0140000d.00c9.04 ext: 0x0 spc: 0x1c42
uba: 0x0140000c.00c9.09 ext: 0x0 spc: 0x1bc0
uba: 0x00000000.00c0.1f ext: 0x1 spc: 0xd4c
uba: 0x00000000.0000.00 ext: 0x0 spc: 0x0
uba: 0x00000000.0000.00 ext: 0x0 spc: 0x0
TRNTBL::
index state cflags wrap# uel scn dba parent-xid nub stmt_num cmt
------------------------------------------------------------------------------------------------
0x00 9 0x00 0x03f3 0x0001 0x0000.0070ec74 0x0140000f 0x0000.000.00000000 0x00000001 0x00000000 1312670852
0x01 9 0x00 0x03f2 0x0004 0x0000.0070ecec 0x0140000f 0x0000.000.00000000 0x00000001 0x00000000 1312671061
0x02 9 0x00 0x03f3 0x0012 0x0000.0071f2ca 0x01400010 0x0000.000.00000000 0x00000001 0x00000000 1312793154
0x03 9 0x00 0x03ee 0x0023 0x0000.00729e4b 0x01400041 0x0000.000.00000000 0x00000001 0x00000000 1312865754
.....
2.2 Dump 整个blcok
通过v$transaction 视图可以确定uba 对应的fileno 和blockno。 如：
SYS@anqing2(rac2)> selectxidusn,xidslot,xidsqn,ubablk,ubafil,ubarec from v$transaction;
XIDUSN XIDSLOT XIDSQN UBABLK UBAFIL UBAREC
---------- ---------- ---------- -------------------- ----------
11 23 1010 12 5 9
直接根据结果dump 对应的block 就ok了。
SYS@anqing2(rac2)> alter system dump datafile 5 block 12;
System altered.
SYS@anqing2(rac2)> oradebug tracefile_name
/u01/app/oracle/admin/anqing/udump/anqing2_ora_3078.trc
Trace file 内容：
Start dump data blocks tsn: 5 file#: 5minblk 12 maxblk 12
buffer tsn: 5 rdba: 0x0140000c (5/12)
scn: 0x0000.0072a1e9 seq: 0x09 flg: 0x04tail: 0xa1e90209
frmt: 0x02 chkval: 0xd566 type: 0x02=KTUUNDO BLOCK
Hex dump of block: st=0, typ_found=1
Dump of memory from 0x0D741400 to0x0D743400
D741400 0000A202 0140000C 0072A1E904090000 [......@...r.....]
D741410 0000D566 0017000B 000003F2090900C9 [f...............]
......
D7433F0 00000000 0041175A 000001DBA1E90209 [....Z.A.........]
********************************************************************************
UNDO BLK:
xid: 0x000b.017.000003f2 seq: 0xc9 cnt: 0x9 irb: 0x9 icl: 0x0 flg: 0x0000
RecOffset Rec Offset Rec Offset Rec Offset Rec Offset
---------------------------------------------------------------------------
0x01 0x1f64 0x02 0x1f08 0x03 0x1e84 0x04 0x1e28 0x05 0x1da4
0x06 0x1d48 0x07 0x1cc4 0x08 0x1c68 0x09 0x1be4
*-----------------------------
* Rec #0x1 slt: 0x17 objn: 53519(0x0000d10f) objd:54764 tblspc: 0(0x00000000)
* Layer: 11(Row) opc: 1 rci 0x00
Undo type: Regular undo Last buffersplit: No
Temp Object: No
Tablespace Undo: No
rdba: 0x0140000b
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x0140000b.00c9.46
KDO Op code: URP row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x018028f1 hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 43(0x2b) flag: 0x0c lock: 0ckix: 12
ncol: 2 nnew: 1 size: 6
col 1: [10] 6f 72 61 5f 72 6f 77 7363 6e
*-----------------------------
* Rec #0x2 slt: 0x17 objn: 53519(0x0000d10f) objd:54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x01
Undo type: Regular undo Last buffersplit: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x0140000b.00c9.47
KDO Op code: LKR row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x0041175a hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 477 to: 0
*-----------------------------
* Rec #0x3 slt: 0x17 objn: 53519(0x0000d10f) objd:54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x02
Undo type: Regular undo Last buffersplit: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x0140000c.00c9.01
KDO Op code: URP row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x018028f1 hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 44(0x2c) flag: 0x0c lock: 0ckix: 12
ncol: 2 nnew: 1 size: 6
col 1: [10] 6f 72 61 5f 72 6f 77 7363 6e
*-----------------------------
......
*-----------------------------
* Rec #0x9 slt: 0x17 objn: 53519(0x0000d10f) objd:54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x08
Undo type: Regular undo Last buffersplit: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x0140000c.00c9.07
KDO Op code: URP row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x018028f1 hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 47(0x2f) flag: 0x0c lock: 0ckix: 12
ncol: 2 nnew: 1 size: 6
col 1: [10] 6f 72 61 5f 72 6f 77 7363 6e
End dump data blocks tsn: 5 file#: 5 minblk12 maxblk 12
[oracle@rac2 ~]$
2.3 根据事务进行Dump
事务的信息还是通过v$transaction 进行查看：
SYS@anqing2(rac2)> selectxidusn,xidslot,xidsqn,ubablk,ubafil,ubarec from v$transaction;
XIDUSN XIDSLOT XIDSQN UBABLK UBAFIL UBAREC
---------- ---------- ---------- -------------------- ----------
11 23 1010 12 5 9
SYS@anqing2(rac2)> select usn,name fromv$rollname where usn=11;
USN NAME
---------- ------------------------------
11 _SYSSMU11$
Dump命令格式如下：
SQL>ALTER SYSTEM DUMP UNDO BLOCK'segment_name' XID xidusn xidslot xidsqn;
SYS@anqing2(rac2)> ALTER SYSTEM DUMP UNDO BLOCK '_SYSSMU11$' XID 11 23 1010;
System altered.
SYS@anqing2(rac2)> oradebug tracefile_name
/u01/app/oracle/admin/anqing/udump/anqing2_ora_3078.trc
[oracle@rac2 ~]$ head -500/u01/app/oracle/admin/anqing/udump/anqing2_ora_3078.trc
*** 2011-08-09 14:12:56.163
********************************************************************************
Undo Segment: _SYSSMU11$ (11)
xid: 0x000b.017.000003f2
Low Blk : (0, 0)
High Blk : (1, 7)
Object Id : ALL
Layer : ALL
Opcode : ALL
Level : 2
********************************************************************************
UNDO BLK: Extent: 0 Block: 2 dba (file#, block#): 5,0x0000000c
xid: 0x000b.017.000003f2 seq: 0xc9 cnt: 0x9 irb: 0x9 icl: 0x0 flg: 0x0000
RecOffset Rec Offset Rec Offset Rec Offset Rec Offset
---------------------------------------------------------------------------
0x01 0x1f64 0x02 0x1f08 0x03 0x1e84 0x04 0x1e28 0x05 0x1da4
0x06 0x1d48 0x07 0x1cc4 0x08 0x1c68 0x09 0x1be4
*-----------------------------
* Rec #0x9 slt: 0x17 objn:53519(0x0000d10f) objd: 54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x08
Undo type: Regular undo Last buffersplit: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x0140000c.00c9.07
KDO Op code: URP row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x018028f1 hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 47(0x2f) flag: 0x0c lock: 0ckix: 12
ncol: 2 nnew: 1 size: 6
col 1: [10] 6f 72 61 5f 72 6f 77 7363 6e
*-----------------------------
* Rec #0x8 slt: 0x17 objn:53519(0x0000d10f) objd: 54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x07
Undo type: Regular undo Last buffersplit: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x0140000c.00c9.06
KDO Op code: LKR row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x0041175a hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 482 to: 0
*-----------------------------
* Rec #0x7 slt: 0x17 objn:53519(0x0000d10f) objd: 54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x06
Undo type: Regular undo Last buffersplit: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x0140000c.00c9.05
KDO Op code: URP row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x018028f1 hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 46(0x2e) flag: 0x0c lock: 0ckix: 12
ncol: 2 nnew: 1 size: 6
col 1: [10] 6f 72 61 5f 72 6f 77 7363 6e
*-----------------------------
* Rec #0x6 slt: 0x17 objn:53519(0x0000d10f) objd: 54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x05
Undo type: Regular undo Last buffersplit: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x0140000c.00c9.04
KDO Op code: LKR row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x0041175a hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 480 to: 0
*-----------------------------
* Rec #0x5 slt: 0x17 objn:53519(0x0000d10f) objd: 54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x04
Undo type: Regular undo Last buffersplit: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x0140000c.00c9.03
KDO Op code: URP row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x018028f1 hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 45(0x2d) flag: 0x0c lock: 0ckix: 12
ncol: 2 nnew: 1 size: 6
col 1: [10] 6f 72 61 5f 72 6f 77 7363 6e
*-----------------------------
* Rec #0x4 slt: 0x17 objn:53519(0x0000d10f) objd: 54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x03
Undo type: Regular undo Last buffersplit: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x0140000c.00c9.02
KDO Op code: LKR row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x0041175a hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 479 to: 0
*-----------------------------
* Rec #0x3 slt: 0x17 objn: 53519(0x0000d10f) objd: 54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x02
Undo type: Regular undo Last buffersplit: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x0140000c.00c9.01
KDO Op code: URP row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x018028f1 hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 44(0x2c) flag: 0x0c lock: 0ckix: 12
ncol: 2 nnew: 1 size: 6
col 1: [10] 6f 72 61 5f 72 6f 77 7363 6e
*-----------------------------
* Rec #0x2 slt: 0x17 objn:53519(0x0000d10f) objd: 54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x01
Undo type: Regular undo Last buffer split: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x0140000b.00c9.47
KDO Op code: LKR row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x0041175a hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 477 to: 0
*-----------------------------
* Rec #0x1 slt: 0x17 objn:53519(0x0000d10f) objd: 54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x00
Undo type: Regular undo Last buffersplit: No
Temp Object: No
Tablespace Undo: No
rdba: 0x0140000b
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x0140000b.00c9.46
KDO Op code: URP row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x018028f1 hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 43(0x2b) flag: 0x0c lock: 0ckix: 12
ncol: 2 nnew: 1 size: 6
col 1: [10] 6f 72 61 5f 72 6f 77 7363 6e
********************************************************************************
UNDO BLK: Extent: 0 Block: 1 dba (file#, block#): 5,0x0000000b
xid: 0x000b.017.000003f2 seq: 0xc9 cnt: 0x47 irb: 0x47 icl: 0x0 flg: 0x0000
Rec Offset Rec Offset Rec Offset Rec Offset Rec Offset
---------------------------------------------------------------------------
0x01 0x1f8c 0x02 0x1f08 0x03 0x1eac 0x04 0x1e28 0x05 0x1dcc
0x06 0x1d48 0x07 0x1cec 0x08 0x1c68 0x09 0x1c0c 0x0a 0x1b88
0x0b 0x1b2c 0x0c 0x1aa8 0x0d 0x1a4c 0x0e 0x19c8 0x0f 0x196c
0x10 0x18e8 0x11 0x188c 0x12 0x1808 0x13 0x17ac 0x14 0x1728
0x15 0x16cc 0x16 0x1648 0x17 0x15ec 0x18 0x1568 0x19 0x150c
0x1a 0x1488 0x1b 0x142c 0x1c 0x13a8 0x1d 0x134c 0x1e 0x12c8
0x1f 0x126c 0x20 0x11e8 0x21 0x118c 0x22 0x1108 0x23 0x10ac
0x24 0x1028 0x25 0x0fcc 0x26 0x0f48 0x27 0x0eec 0x28 0x0e68
0x29 0x0e0c 0x2a 0x0d88 0x2b 0x0d2c 0x2c 0x0ca8 0x2d 0x0c4c
0x2e 0x0bc8 0x2f 0x0b6c 0x30 0x0ae8 0x31 0x0a8c 0x32 0x0a08
0x33 0x09ac 0x34 0x0928 0x35 0x08cc 0x36 0x0848 0x37 0x07ec
0x38 0x0768 0x39 0x070c 0x3a 0x0688 0x3b 0x062c 0x3c 0x05a8
0x3d 0x054c 0x3e 0x04c8 0x3f 0x046c 0x40 0x03e8 0x41 0x038c
0x42 0x0308 0x43 0x02ac 0x44 0x0228 0x45 0x01cc 0x46 0x0148
0x47 0x00ec
*-----------------------------
* Rec #0x47 slt: 0x17 objn:53519(0x0000d10f) objd: 54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x46
Undo type: Regular undo Last buffer split: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x0140000b.00c9.45
KDO Op code: LKR row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x0041175a hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 475 to: 0
*-----------------------------
* Rec #0x46 slt: 0x17 objn:53519(0x0000d10f) objd: 54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x45
Undo type: Regular undo Last buffersplit: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x0140000b.00c9.44
KDO Op code: URP row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x018028f1 hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 42(0x2a) flag: 0x0c lock: 0ckix: 12
ncol: 2 nnew: 1 size: 6
col 1: [10] 6f 72 61 5f 72 6f 77 7363 6e
[oracle@rac2 ~]$ tail-100 /u01/app/oracle/admin/anqing/udump/anqing2_ora_3078.trc
xtype: XA flags: 0x00000000 bdba:0x0041175a hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 13(0xd) flag: 0x2c lock: 0ckix: 12
ncol: 2 nnew: 1 size: 6
col 1: [10] 6f 72 61 5f 72 6f 77 7363 6e
*-----------------------------
* Rec #0x10 slt: 0x17 objn: 53519(0x0000d10f) objd: 54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x0f
Undo type: Regular undo Last buffersplit: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x01400041.00c8.0f
KDO Op code: URP row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x0041175a hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 12(0xc) flag: 0x2c lock: 0ckix: 12
ncol: 2 nnew: 1 size: 6
col 1: [10] 6f 72 61 5f 72 6f 77 7363 6e
*-----------------------------
* Rec #0xf slt: 0x17 objn:53519(0x0000d10f) objd: 54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x0e
Undo type: Regular undo Last buffersplit: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x01400041.00c8.0e
KDO Op code: URP row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x0041175a hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 11(0xb) flag: 0x2c lock: 0ckix: 12
ncol: 2 nnew: 1 size: 6
col 1: [10] 6f 72 61 5f 72 6f 77 7363 6e
*-----------------------------
* Rec #0xe slt: 0x17 objn:53519(0x0000d10f) objd: 54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x0d
Undo type: Regular undo Last buffersplit: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
KDO undo record:
KTB Redo
op: 0x02 ver: 0x01
op: C uba: 0x01400041.00c8.0d
KDO Op code: URP row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x0041175a hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 10(0xa) flag: 0x2c lock: 0ckix: 12
ncol: 2 nnew: 1 size: 6
col 1: [10] 6f 72 61 5f 72 6f 77 7363 6e
*-----------------------------
* Rec #0xd slt: 0x17 objn:53519(0x0000d10f) objd: 54764 tblspc: 0(0x00000000)
* Layer: 11 (Row) opc: 1 rci 0x00
Undo type: Regular undo Begin trans Last buffer split: No
Temp Object: No
Tablespace Undo: No
rdba: 0x00000000
*-----------------------------
uba: 0x01400041.00c8.0c ctl max scn:0x0000.0070e148 prv tx scn: 0x0000.0070e216
txn start scn: scn: 0x0000.0072a1db logonuser: 0
prevbrb: 20971534 prev bcl: 0
KDO undo record:
KTB Redo
op: 0x04 ver: 0x01
op: L itl: xid: 0x0013.007.00000340uba: 0x014015bc.00a2.11
flg: C--- lkc: 0 scn: 0x0000.005bf84e
KDO Op code: URP row dependencies Disabled
xtype: XA flags: 0x00000000 bdba:0x0041175a hdba: 0x00411759
itli: 2 ispac: 0 maxfr: 4863
tabn: 0 slot: 9(0x9) flag: 0x2c lock: 0ckix: 12
ncol: 2 nnew: 1 size: 6
col 1: [10] 6f 72 61 5f 72 6f 77 7363 6e
+++++++++++ Next block not in extent map -rollback segment has been shrunk.
+ WARNING + Block dba (file#, block#):0,0x00000000
+++++++++++
*************************************
Total undo blocks scanned = 11
Total undo records scanned = 667
Total undo blocks dumped = 11
Total undo records dumped = 667
##Total warnings issued = 1
*************************************
-------------------------------------------------------------------------------------------------------
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