Environment: OS: Ubuntu 10.10 Oracle: 11.1.0.6.0 Test table： test_user SQL desc test_user; Name Null? Type ----------------------------------------- -------- ---------------------------- ID NUMBER(38) NAME VARCHAR2(20) Current data: SQL s
Environment:
Test table： test_user
SQL> desc test_user; Name Null? Type ----------------------------------------- -------- ---------------------------- ID NUMBER(38) NAME VARCHAR2(20)
Current data:
SQL> select * from test_user; ID NAME ---------- -------------------- 1 aaa 2 bbb 3 ccc
Operation:
update test_user set name='ddd' where id=3; commit;
Log File Dumps :
Symbolic dumps can be created for both online redo logs and archived redo logs using the following syntax: ALTER SYSTEM DUMP LOGFILE ' ';
For online redo logs the filename of the current redo log can be obtained using the following SQL: SELECT member FROM v$logfile WHERE group# = ( SELECT group# FROM v$log WHERE status = 'CURRENT' );
Output dump file can be found with this command:
SQL> SELECT VALUE FROM V$DIAG_INFO WHERE NAME = 'Default Trace File';
if ASM, use following command
SQL> oradebug setmypid; Statement processed. SQL> oradebug tracefile_name; /u02/app/diag/rdbms/ora11g/ora11g/trace/ora11g_ora_20221.trc
Find the detail log info we just operated in dump file:
1. find the object id of the table
SQL> select object_id from user_objects where object_name='TEST_USER';
OBJECT_ID
----------
71329
2. find log in dump file based on "object_id" and operation time.The redo infomation as follows, note the "OBJ:71329" and the timestap "12/21/2010
REDO RECORD - Thread:1 RBA: 0x000007.00012d3d.0010 LEN: 0x022c VLD: 0x0d SCN: 0x0000.000fddbd SUBSCN: 1 12/21/2010 16:30:29 CHANGE #1 TYP:2 CLS: 1 AFN:4 DBA:0x01000195 OBJ:71329 SCN:0x0000.000fdd5e SEQ: 2 OP:11.19 KTB Redo op: 0x01 ver: 0x01 compat bit: 4 (post-11) padding: 1 op: F xid: 0x000a.005.0000035a uba: 0x00c00478.01ca.28 Array Update of 1 rows: tabn: 0 slot: 2(0x2) flag: 0x2c lock: 2 ckix: 15 ncol: 2 nnew: 1 size: 0 KDO Op code: 21 row dependencies Disabled xtype: XAxtype KDO_KDOM2 flags: 0x00000080 bdba: 0x01000195 hdba: 0x01000193 itli: 2 ispac: 0 maxfr: 4858 vect = 3 col 1: [ 3] 64 64 64 CHANGE #2 TYP:0 CLS:35 AFN:3 DBA:0x00c00099 OBJ:4294967295 SCN:0x0000.000fdd85 SEQ: 1 OP:5.2 ktudh redo: slt: 0x0005 sqn: 0x0000035a flg: 0x0012 siz: 184 fbi: 0 uba: 0x00c00478.01ca.28 pxid: 0x0000.000.00000000 CHANGE #3 TYP:0 CLS:35 AFN:3 DBA:0x00c00099 OBJ:4294967295 SCN:0x0000.000fddbd SEQ: 1 OP:5.4 ktucm redo: slt: 0x0005 sqn: 0x0000035a srt: 0 sta: 9 flg: 0x2 ktucf redo: uba: 0x00c00478.01ca.28 ext: 2 spc: 3182 fbi: 0 CHANGE #4 TYP:0 CLS:36 AFN:3 DBA:0x00c00478 OBJ:4294967295 SCN:0x0000.000fdd84 SEQ: 1 OP:5.1 ktudb redo: siz: 184 spc: 3368 flg: 0x0012 seq: 0x01ca rec: 0x28 xid: 0x000a.005.0000035a ktubl redo: slt: 5 rci: 0 opc: 11.1 objn: 71329 objd: 71329 tsn: 4 Undo type: Regular undo Begin trans Last buffer split: No Temp Object: No Tablespace Undo: No 0x00000000 prev ctl uba: 0x00c00478.01ca.27 prev ctl max cmt scn: 0x0000.000fd7ee prev tx cmt scn: 0x0000.000fd7fa txn start scn: 0x0000.000fdd5e logon user: 106 prev brb: 12584054 prev bcl: 0 BuExt idx: 0 flg2: 0 KDO undo record: KTB Redo op: 0x04 ver: 0x01 compat bit: 4 (post-11) padding: 1 op: L itl: xid: 0x0004.020.000002ef uba: 0x00c0011b.02c1.0a flg: C--- lkc: 0 scn: 0x0000.000f25f5 Array Update of 1 rows: tabn: 0 slot: 2(0x2) flag: 0x2c lock: 0 ckix: 15 ncol: 2 nnew: 1 size: 0 KDO Op code: 21 row dependencies Disabled xtype: XAxtype KDO_KDOM2 flags: 0x00000080 bdba: 0x01000195 hdba: 0x01000193 itli: 2 ispac: 0 maxfr: 4858 vect = 3 col 1: [ 3] 63 63 63
Redo Log Analysis:
Redo Records Structure:
Reo Record Header
REDO RECORD - Thread:1 RBA: 0x000007.00012d3d.0010 LEN: 0x022c VLD: 0x0d SCN: 0x0000.000fddbd SUBSCN: 1 12/21/2010 16:30:29
Thread - redo log thread number RBA - redo byte address - address of redo record within redo log. Format is .
block_number: 0x00012d3d
LEN - length of redo record in bytes including header
value: 0x22c
VLD -The VLD field determines the size of the redo record header. Known values are shown in the following table. These values may vary from one release to another.
Mnemonic Value Description KCRVOID 0 The contents are not valid KCRVALID 1 Includes change vectors KCRDEPND 2 Includes commit SCN KCRVOID 4 Includes dependent SCN KCRNMARK 8 New SCN mark record. SCN allocated exactly at this point in the redo log by this instance KCROMARK 16 Old SCN mark record. SCN allocated at or before this point in the redo. May be allocated by another instance KCRORDER 32 New SCN was allocated to ensure redo for some block would be ordered by inc/seq# when redo sorted by SCN
value: 0x0d - 1101: "Includes change vectors" & "Includes dependent SCN" & "New SCN mark record. SCN allocated exactly at this point in the redo log by this instance"
SCN - system change number of redo recordvalue: 0x0000.000fddbd
SUBSCN: Unknown Timestamp
Change #1:
CHANGE #1 TYP:2 CLS: 1 AFN:4 DBA:0x01000195 OBJ:71329 SCN:0x0000.000fdd5e SEQ: 2 OP:11.19 KTB Redo op: 0x01 ver: 0x01 compat bit: 4 (post-11) padding: 1 op: F xid: 0x000a.005.0000035a uba: 0x00c00478.01ca.28 Array Update of 1 rows: tabn: 0 slot: 2(0x2) flag: 0x2c lock: 2 ckix: 15 ncol: 2 nnew: 1 size: 0 KDO Op code: 21 row dependencies Disabled xtype: XAxtype KDO_KDOM2 flags: 0x00000080 bdba: 0x01000195 hdba: 0x01000193 itli: 2 ispac: 0 maxfr: 4858 vect = 3 col 1: [ 3] 64 64 64
Change Header:
CHANGE #1 TYP:2 CLS: 1 AFN:4 DBA:0x01000195 OBJ:71329 SCN:0x0000.000fdd5e SEQ: 2 OP:11.19
TYP - change type CLS - classClass Description 1 Data Block 2 Sort Block 3 Deferred Undo Segment Blocks 4 Segment Header Block (Table) 5 Deferred Undo Segment Header Blocks 6 Free List Blocks 7 Extent Map Blocks 8 Space Management Bitmap Blocks 9 Space Management Index Blocks 10 Unused 11 + 2r Segment Header for Undo Segment r 12 + 2r Data Blocks for Undo Segment r
value: 1 - mean data block
AFN - Absolute File Noget file info using this sql statement:
SQL> select file_name, file_id from dba_data_files; FILE_NAME -------------------------------------------------------------------------------- FILE_ID ---------- /home/duanbb/oracle/oradata/mydb/users01.dbf 4 /home/duanbb/oracle/oradata/mydb/undotbs01.dbf 3 /home/duanbb/oracle/oradata/mydb/sysaux01.dbf 2 FILE_NAME -------------------------------------------------------------------------------- FILE_ID ---------- /home/duanbb/oracle/oradata/mydb/system01.dbf 1 /home/duanbb/oracle/oradata/mydb/example01.dbf 5
value: 4 - means to "users01.dbf"
DBA - Database Block Address OBJ - object SCN - System change Numbervalue: 0x0000.000fdd5e
base: 0xfdd5e
SEQ - Sequence Number OP - Operation Code
Each change vector has an operation code. In Oracle 9.2 there were over 150 redo log operations; this number has grown significantly in Oracle 10.2 though the exact figure is not known. The operation code consists of a major number and a minor number.
The major number describes the level in the kernel where the redo is generated. The following table shows common levels:
Level Description 4 Block Cleanout 5 Transaction Layer (Undo) 10 Index Operation 11 Table Operation (DML) 13 Block Allocation 14 Extent Allocation 17 Backup Management 18 Online Backup 19 Direct Load 20 Transaction Metadata (LogMiner) 22 Space Management (ASSM) 23 Block Write (DBWR) 24 DDL StatementFor "Table Operation(DML)", description as follows:
Code Mnemonic Description 11.1 IUR Undo 11.2 IRP Insert Row Piece 11.3 DRP Delete Row Piece 11.4 LKR Lock Row 11.5 URP Update Row Piece 11.6 ORP Overflow Row Piece 11.7 MFC 11.8 CFA 11.9 CKI 11.10 SKL 11.11 QMI Insert Row Array 11.12 QMD Delete Row Array 11.14 DSC 11.16 LMN 11.17 LLB 11.19 19 Update Row Array 11.20 SHK 11.21 21
For "Transaction Layer (Undo)", description as follows:
Code Mnemonic Description 5.1 1 Undo Recorder 5.2 2 Undo Header 5.4 4 Commit
KTB Redo op: 0x01 ver: 0x01 compat bit: 4 (post-11) padding: 1 op: F xid: 0x000a.005.0000035a uba: 0x00c00478.01ca.28
KTB Redo
KTB Redo records modifications to the transaction header of a block. The inverse operations are recorded in the undo segment
Each KTB Redo record has an operation type. Known codes include:
Numeric Code Alphanumeric Code 0x1 F 0x2 C 0x3 Z 0x4 L 0x5 R 0x11 F op: 0x01 - Numeric Code ver: 0x01 op: F - Alphanumeric Codexid : Transaction ID. Format is usn#.slot#.wrap# Components are:
usn# Undo segment number slot# Slot number in undo segment wrap# Sequence numbervalue: 0x000a.005.0000035a
usn: 0x000a
wrap: 0x0000035a
uba: uba Undo block address. Format is dba.seq#.rec# Components are: dba Data block address of undo block seq# Sequence number of undo block rec# Record number within undo blockseq: 0x01ca
tabn: 0 slot: 2(0x2) flag: 0x2c lock: 2 ckix: 15
tabn - specifies the table number. For non-clustered tables this will always be 0 slot - specifies the slot number. Each block has an variable length array of slots. Each element in this array specifies the location of a row within the block. The first slot in the block is 0. In this example the row was written to the third slot in the table (slot 2) flag - Unknown lock - probably set to 1 indicating a lock has been taken on the row header, what's the mean 2? ckix - Unknownncol: 2 nnew: 1 size: 0
ncol - Number of columns in row piece nnew - Number of changed columns in row piece size - (Probably) change in size of row pieceKDO Op code: 21 row dependencies Disabled
Operation code: Update Row Piece row dependencies - specifies whether row dependencies are disabled (default) or enabled for this tablextype: XAxtype KDO_KDOM2 flags: 0x00000080 bdba: 0x01000195 hdba: 0x01000193
xtype - transaction type. Can be XA, XR, CR or KDO_KDOM2. In this case the transaction type is KDO_KDOM2. This structure can potentially store an array of change vectors for an object. flags - Unknown bdba - block DBA. Data block address of this block hdba - header DBA. Probably data block address of extent header
itli: 2 ispac: 0 maxfr: 4858
itli - specifes the ITL slot number of the transaction performing the operation. In this example the row is locked by the transaction in the first ITL slot. ispac - Unknown maxfr - Unknownvect = 3 col 1: [ 3] 64 64 64
Update of column 1 (name) to 'ddd'
Change #2:
CHANGE #2 TYP:0 CLS:35 AFN:3 DBA:0x00c00099 OBJ:4294967295 SCN:0x0000.000fdd85 SEQ: 1 OP:5.2 ktudh redo: slt: 0x0005 sqn: 0x0000035a flg: 0x0012 siz: 184 fbi: 0 uba: 0x00c00478.01ca.28 pxid: 0x0000.000.00000000
Change header:
CHANGE #2 TYP:0 CLS:35 AFN:3 DBA:0x00c00099 OBJ:4294967295 SCN:0x0000.000fdd85 SEQ: 1 OP:5.2
TYP: 0 CLS: 35 AFN: 3 - refer to "undotbs01.dbf" DBA: 0x00c00099 OBJ: 4294967259 SCN: 0x0000.000fdd85 SEQ: 1 OP: 5.2 - means "Undo header"Change body:
ktudh redo: slt: 0x000f sqn: 0x00000312 flg: 0x0012 siz: 156 fbi: 0 uba: 0x00c005ba.02c2.19 pxid: 0x0000.000.00000000
Change #3:
CHANGE #3 TYP:0 CLS:35 AFN:3 DBA:0x00c00099 OBJ:4294967295 SCN:0x0000.000fddbd SEQ: 1 OP:5.4 ktucm redo: slt: 0x0005 sqn: 0x0000035a srt: 0 sta: 9 flg: 0x2 ktucf redo: uba: 0x00c00478.01ca.28 ext: 2 spc: 3182 fbi: 0
Change header:
CHANGE #3 TYP:0 CLS:23 AFN:3 DBA:0x00c00039 OBJ:4294967295 SCN:0x0000.000fddc3 SEQ: 1 OP:5.4
TYP: 0 CLS: 35 AFN: 3 - refer to "undotbs01.dbf" DBA: 0x00c00039 OBJ: 4294967295 SCN: 0x0000.000fddc3 SEQ: 1 OP: 5.4 - means "Commit"Change #4:
CHANGE #4 TYP:0 CLS:36 AFN:3 DBA:0x00c00478 OBJ:4294967295 SCN:0x0000.000fdd84 SEQ: 1 OP:5.1 ktudb redo: siz: 184 spc: 3368 flg: 0x0012 seq: 0x01ca rec: 0x28 xid: 0x000a.005.0000035a ktubl redo: slt: 5 rci: 0 opc: 11.1 objn: 71329 objd: 71329 tsn: 4 Undo type: Regular undo Begin trans Last buffer split: No Temp Object: No Tablespace Undo: No 0x00000000 prev ctl uba: 0x00c00478.01ca.27 prev ctl max cmt scn: 0x0000.000fd7ee prev tx cmt scn: 0x0000.000fd7fa txn start scn: 0x0000.000fdd5e logon user: 106 prev brb: 12584054 prev bcl: 0 BuExt idx: 0 flg2: 0 KDO undo record: KTB Redo op: 0x04 ver: 0x01 compat bit: 4 (post-11) padding: 1 op: L itl: xid: 0x0004.020.000002ef uba: 0x00c0011b.02c1.0a flg: C--- lkc: 0 scn: 0x0000.000f25f5 Array Update of 1 rows: tabn: 0 slot: 2(0x2) flag: 0x2c lock: 0 ckix: 15 ncol: 2 nnew: 1 size: 0 KDO Op code: 21 row dependencies Disabled xtype: XAxtype KDO_KDOM2 flags: 0x00000080 bdba: 0x01000195 hdba: 0x01000193 itli: 2 ispac: 0 maxfr: 4858 vect = 3 col 1: [ 3] 63 63 63
Change header:
CHANGE #4 TYP:0 CLS:24 AFN:3 DBA:0x00c005ba OBJ:4294967295 SCN:0x0000.000fdd8a SEQ: 3 OP:5.1
TYP: 0 CLS: 24 AFN: 3 - refer to "undotbs01.dbf" DBA: 0x00c005ba OBJ: 4294967295 SCN: 0x0000.000fdd8a SEQ: 3 OP: 5.1 - means "Undo Recorder"Change Body:
logon user: 106 - current user id, confirmed as follows:SQL> select user,uid from dual; USER UID ------------------------------ ---------- MYDB1 106
RollBack:
Opration:
SQL> select * from test_user; ID NAME ---------- -------------------- 1 aaa 2 222 3 111 SQL> SQL> update test_user set name='999' where id=3; 1 row updated. SQL> rollback; Rollback complete.
Redo Log:
REDO RECORD - Thread:1 RBA: 0x00000b.0000e166.016c LEN: 0x01b8 VLD: 0x09 SCN: 0x0000.0011db22 SUBSCN: 1 12/27/2010 13:28:52 CHANGE #1 TYP:0 CLS: 1 AFN:4 DBA:0x01000195 OBJ:71329 SCN:0x0000.0011cbe9 SEQ: 1 OP:11.19 KTB Redo op: 0x01 ver: 0x01 compat bit: 4 (post-11) padding: 1 op: F xid: 0x0006.008.0000042c uba: 0x00c000d6.01ed.03 Array Update of 1 rows: tabn: 0 slot: 2(0x2) flag: 0x2c lock: 1 ckix: 15 ncol: 2 nnew: 1 size: 0 KDO Op code: 21 row dependencies Disabled xtype: XAxtype KDO_KDOM2 flags: 0x00000080 bdba: 0x01000195 hdba: 0x01000193 itli: 1 ispac: 0 maxfr: 4858 vect = 3 col 1: [ 3] 39 39 39 CHANGE #2 TYP:0 CLS:27 AFN:3 DBA:0x00c00059 OBJ:4294967295 SCN:0x0000.0011db19 SEQ: 2 OP:5.2 ktudh redo: slt: 0x0008 sqn: 0x0000042c flg: 0x0012 siz: 184 fbi: 0 uba: 0x00c000d6.01ed.03 pxid: 0x0000.000.00000000 CHANGE #3 TYP:0 CLS:28 AFN:3 DBA:0x00c000d6 OBJ:4294967295 SCN:0x0000.0011db19 SEQ: 1 OP:5.1 ktudb redo: siz: 184 spc: 7914 flg: 0x0012 seq: 0x01ed rec: 0x03 xid: 0x0006.008.0000042c ktubl redo: slt: 8 rci: 0 opc: 11.1 objn: 71329 objd: 71329 tsn: 4 Undo type: Regular undo Begin trans Last buffer split: No Temp Object: No Tablespace Undo: No 0x00000000 prev ctl uba: 0x00c000d6.01ed.02 prev ctl max cmt scn: 0x0000.0011d79d prev tx cmt scn: 0x0000.0011d7bc txn start scn: 0x0000.0011cbea logon user: 106 prev brb: 12583123 prev bcl: 0 BuExt idx: 0 flg2: 0 KDO undo record: KTB Redo op: 0x04 ver: 0x01 compat bit: 4 (post-11) padding: 1 op: L itl: xid: 0x0001.001.00000350 uba: 0x00c00010.0228.1e flg: C--- lkc: 0 scn: 0x0000.0011ca07 Array Update of 1 rows: tabn: 0 slot: 2(0x2) flag: 0x2c lock: 0 ckix: 15 ncol: 2 nnew: 1 size: 0 KDO Op code: 21 row dependencies Disabled xtype: XAxtype KDO_KDOM2 flags: 0x00000080 bdba: 0x01000195 hdba: 0x01000193 itli: 1 ispac: 0 maxfr: 4858 vect = 3 col 1: [ 3] 31 31 31 REDO RECORD - Thread:1 RBA: 0x00000b.0000e167.0134 LEN: 0x00e0 VLD: 0x01 SCN: 0x0000.0011db22 SUBSCN: 2 12/27/2010 13:28:52 CHANGE #1 TYP:0 CLS: 1 AFN:4 DBA:0x01000195 OBJ:71329 SCN:0x0000.0011db22 SEQ: 1 OP:11.19 KTB Redo op: 0x04 ver: 0x01 compat bit: 4 (post-11) padding: 1 op: L itl: xid: 0x0001.001.00000350 uba: 0x00c00010.0228.1e flg: C--- lkc: 0 scn: 0x0000.0011ca07 Array Update of 1 rows: tabn: 0 slot: 2(0x2) flag: 0x2c lock: 0 ckix: 15 ncol: 2 nnew: 1 size: 0 KDO Op code: 21 row dependencies Disabled xtype: XRxtype KDO_KDOM2 flags: 0x00000080 bdba: 0x01000195 hdba: 0x01000193 itli: 1 ispac: 0 maxfr: 4858 vect = 3 col 1: [ 3] 31 31 31 CHANGE #2 TYP:0 CLS:27 AFN:3 DBA:0x00c00059 OBJ:4294967295 SCN:0x0000.0011db22 SEQ: 1 OP:5.11 ktubu redo: slt: 8 rci: 0 opc: 11.1 objn: 71329 objd: 71329 tsn: 4 Undo type: Regular undo Undo type: User undo done Begin trans Last buffer split: No Tablespace Undo: No 0x00000000 BuExt idx: 0flg2: 0 REDO RECORD - Thread:1 RBA: 0x00000b.0000e168.0024 LEN: 0x0050 VLD: 0x01 SCN: 0x0000.0011db23 SUBSCN: 1 12/27/2010 13:28:52 CHANGE #1 TYP:0 CLS:27 AFN:3 DBA:0x00c00059 OBJ:4294967295 SCN:0x0000.0011db22 SEQ: 2 OP:5.4 ktucm redo: slt: 0x0008 sqn: 0x0000042c srt: 0 sta: 9 flg: 0x4 rolled back transaction
Update Multiple rows:
Operation:
SQL> select * from test_user; ID NAME ---------- -------------------- 1 aaa 2 222 3 111 SQL> SQL> update test_user set name='333'; 3 rows updated.
Redo Log:
REDO RECORD - Thread:1 RBA: 0x00000b.0001031f.013c LEN: 0x0250 VLD: 0x09 SCN: 0x0000.0011ea91 SUBSCN: 1 12/27/2010 15:05:47 CHANGE #1 TYP:0 CLS: 1 AFN:4 DBA:0x01000195 OBJ:71329 SCN:0x0000.0011db22 SEQ: 2 OP:11.19 KTB Redo op: 0x01 ver: 0x01 compat bit: 4 (post-11) padding: 1 op: F xid: 0x0001.01b.00000355 uba: 0x00c000f4.022b.15 Array Update of 3 rows: tabn: 0 slot: 0(0x0) flag: 0x2c lock: 1 ckix: 15 ncol: 2 nnew: 1 size: 0 KDO Op code: 21 row dependencies Disabled xtype: XAxtype KDO_KDOM2 flags: 0x00000080 bdba: 0x01000195 hdba: 0x01000193 itli: 1 ispac: 0 maxfr: 4858 vect = 3 col 1: [ 3] 33 33 33 tabn: 0 slot: 1(0x1) flag: 0x2c lock: 1 ckix: 15 ncol: 2 nnew: 1 size: 0 KDO Op code: 21 row dependencies Disabled xtype: XAxtype KDO_KDOM2 flags: 0x00000080 bdba: 0x01000195 hdba: 0x01000193 itli: 1 ispac: 0 maxfr: 4858 vect = 3 col 1: [ 3] 33 33 33 tabn: 0 slot: 2(0x2) flag: 0x2c lock: 1 ckix: 15 ncol: 2 nnew: 1 size: 0 KDO Op code: 21 row dependencies Disabled xtype: XAxtype KDO_KDOM2 flags: 0x00000080 bdba: 0x01000195 hdba: 0x01000193 itli: 1 ispac: 0 maxfr: 4858 vect = 3 col 1: [ 3] 33 33 33 CHANGE #2 TYP:0 CLS:17 AFN:3 DBA:0x00c00009 OBJ:4294967295 SCN:0x0000.0011ea48 SEQ: 2 OP:5.2 ktudh redo: slt: 0x001b sqn: 0x00000355 flg: 0x0012 siz: 260 fbi: 0 uba: 0x00c000f4.022b.15 pxid: 0x0000.000.00000000 CHANGE #3 TYP:0 CLS:18 AFN:3 DBA:0x00c000f4 OBJ:4294967295 SCN:0x0000.0011ea48 SEQ: 15 OP:5.1 ktudb redo: siz: 260 spc: 5766 flg: 0x0012 seq: 0x022b rec: 0x15 xid: 0x0001.01b.00000355 ktubl redo: slt: 27 rci: 0 opc: 11.1 objn: 71329 objd: 71329 tsn: 4 Undo type: Regular undo Begin trans Last buffer split: No Temp Object: No Tablespace Undo: No 0x00000000 prev ctl uba: 0x00c000f4.022b.06 prev ctl max cmt scn: 0x0000.0011e534 prev tx cmt scn: 0x0000.0011e57b txn start scn: 0x0000.0011ea91 logon user: 106 prev brb: 12583064 prev bcl: 0 BuExt idx: 0 flg2: 0 KDO undo record: KTB Redo op: 0x04 ver: 0x01 compat bit: 4 (post-11) padding: 1 op: L itl: xid: 0x0001.001.00000350 uba: 0x00c00010.0228.1e flg: C--- lkc: 0 scn: 0x0000.0011ca07 Array Update of 3 rows: tabn: 0 slot: 0(0x0) flag: 0x2c lock: 0 ckix: 15 ncol: 2 nnew: 1 size: 0 KDO Op code: 21 row dependencies Disabled xtype: XAxtype KDO_KDOM2 flags: 0x00000080 bdba: 0x01000195 hdba: 0x01000193 itli: 1 ispac: 0 maxfr: 4858 vect = 3 col 1: [ 3] 61 61 61 tabn: 0 slot: 1(0x1) flag: 0x2c lock: 0 ckix: 15 ncol: 2 nnew: 1 size: 0 KDO Op code: 21 row dependencies Disabled xtype: XAxtype KDO_KDOM2 flags: 0x00000080 bdba: 0x01000195 hdba: 0x01000193 itli: 1 ispac: 0 maxfr: 4858 vect = 3 col 1: [ 3] 32 32 32 tabn: 0 slot: 2(0x2) flag: 0x2c lock: 0 ckix: 15 ncol: 2 nnew: 1 size: 0 KDO Op code: 21 row dependencies Disabled xtype: XAxtype KDO_KDOM2 flags: 0x00000080 bdba: 0x01000195 hdba: 0x01000193 itli: 1 ispac: 0 maxfr: 4858 vect = 3 col 1: [ 3] 31 31 31
Multi Operation One Commit:
operation:
SQL> select * from test_user; ID NAME ---------- -------------------- 1 111 2 222 3 333 SQL> update test_user set name='aaa' where id=1; 1 row updated. SQL> update test_user set name='bbb' where id=2; 1 row updated. SQL> commit; Commit complete.
Redo Log:
REDO RECORD - Thread:1 RBA: 0x000019.00001837.0010 LEN: 0x0224 VLD: 0x05 SCN: 0x0000.00178fd4 SUBSCN: 1 01/06/2011 16:11:12 CHANGE #1 TYP:0 CLS:17 AFN:3 DBA:0x00c00009 OBJ:4294967295 SCN:0x0000.00178f8c SEQ: 1 OP:5.2 ktudh redo: slt: 0x0007 sqn: 0x0000042d flg: 0x0012 siz: 184 fbi: 0 uba: 0x00c00a7d.029a.15 pxid: 0x0000.000.00000000 CHANGE #2 TYP:0 CLS:18 AFN:3 DBA:0x00c00a7d OBJ:4294967295 SCN:0x0000.00178f8b SEQ: 3 OP:5.1 ktudb redo: siz: 184 spc: 5486 flg: 0x0012 seq: 0x029a rec: 0x15 xid: 0x0001.007.0000042d ktubl redo: slt: 7 rci: 0 opc: 11.1 objn: 71329 objd: 71828 tsn: 4 Undo type: Regular undo Begin trans Last buffer split: No Temp Object: No Tablespace Undo: No 0x00000000 prev ctl uba: 0x00c00a7d.029a.12 prev ctl max cmt scn: 0x0000.001789db prev tx cmt scn: 0x0000.001789eb txn start scn: 0xffff.ffffffff logon user: 106 prev brb: 12585591 prev bcl: 0 BuExt idx: 0 flg2: 0 KDO undo record: KTB Redo op: 0x04 ver: 0x01 compat bit: 4 (post-11) padding: 1 op: L itl: xid: 0x0005.013.00000551 uba: 0x00c00e6f.01ff.0e flg: C--- lkc: 0 scn: 0x0000.0017875c KDO Op code: URP row dependencies Disabled xtype: XA flags: 0x00000000 bdba: 0x01000198 hdba: 0x01000193 itli: 1 ispac: 0 maxfr: 4858 tabn: 0 slot: 0(0x0) flag: 0x2c lock: 0 ckix: 0 ncol: 2 nnew: 1 size: 0 col 1: [ 3] 31 31 31 CHANGE #3 TYP:2 CLS: 1 AFN:4 DBA:0x01000198 OBJ:71828 SCN:0x0000.00178ead SEQ: 1 OP:11.5 KTB Redo op: 0x11 ver: 0x01 compat bit: 4 (post-11) padding: 1 op: F xid: 0x0001.007.0000042d uba: 0x00c00a7d.029a.15 Block cleanout record, scn: 0x0000.00178fd4 ver: 0x01 opt: 0x02, entries follow... itli: 2 flg: 2 scn: 0x0000.00178ead KDO Op code: URP row dependencies Disabled xtype: XA flags: 0x00000000 bdba: 0x01000198 hdba: 0x01000193 itli: 1 ispac: 0 maxfr: 4858 tabn: 0 slot: 0(0x0) flag: 0x2c lock: 1 ckix: 0 ncol: 2 nnew: 1 size: 0 col 1: [ 3] 61 61 61 CHANGE #4 MEDIA RECOVERY MARKER SCN:0x0000.00000000 SEQ: 0 OP:5.20 session number = 113 serial number = 2027 transaction name = version 185599488 audit sessionid 203728 REDO RECORD - Thread:1 RBA: 0x000019.00001943.0010 LEN: 0x0140 VLD: 0x05 SCN: 0x0000.0017902a SUBSCN: 1 01/06/2011 16:11:30 CHANGE #1 TYP:0 CLS:18 AFN:3 DBA:0x00c00a7d OBJ:4294967295 SCN:0x0000.00178fd4 SEQ: 1 OP:5.1 ktudb redo: siz: 116 spc: 5300 flg: 0x0022 seq: 0x029a rec: 0x16 xid: 0x0001.007.0000042d ktubu redo: slt: 7 rci: 21 opc: 11.1 objn: 71329 objd: 71828 tsn: 4 Undo type: Regular undo Undo type: Last buffer split: No Tablespace Undo: No 0x00000000 KDO undo record: KTB Redo op: 0x02 ver: 0x01 compat bit: 4 (post-11) padding: 1 op: C uba: 0x00c00a7d.029a.15 KDO Op code: URP row dependencies Disabled xtype: XA flags: 0x00000000 bdba: 0x01000198 hdba: 0x01000193 itli: 1 ispac: 0 maxfr: 4858 tabn: 0 slot: 1(0x1) flag: 0x2c lock: 0 ckix: 0 ncol: 2 nnew: 1 size: 0 col 1: [ 3] 32 32 32 CHANGE #2 TYP:0 CLS: 1 AFN:4 DBA:0x01000198 OBJ:71828 SCN:0x0000.00178fd4 SEQ: 1 OP:11.5 KTB Redo op: 0x02 ver: 0x01 compat bit: 4 (post-11) padding: 1 op: C uba: 0x00c00a7d.029a.16 KDO Op code: URP row dependencies Disabled xtype: XA flags: 0x00000000 bdba: 0x01000198 hdba: 0x01000193 itli: 1 ispac: 0 maxfr: 4858 tabn: 0 slot: 1(0x1) flag: 0x2c lock: 1 ckix: 0 ncol: 2 nnew: 1 size: 0 col 1: [ 3] 62 62 62 REDO RECORD - Thread:1 RBA: 0x000019.0000194c.0010 LEN: 0x00bc VLD: 0x05 SCN: 0x0000.00179033 SUBSCN: 1 01/06/2011 16:11:37 CHANGE #1 TYP:0 CLS:17 AFN:3 DBA:0x00c00009 OBJ:4294967295 SCN:0x0000.00178fd4 SEQ: 1 OP:5.4 ktucm redo: slt: 0x0007 sqn: 0x0000042d srt: 0 sta: 9 flg: 0x2 ktucf redo: uba: 0x00c00a7d.029a.16 ext: 2 spc: 5182 fbi: 0 CHANGE #2 MEDIA RECOVERY MARKER SCN:0x0000.00000000 SEQ: 0 OP:24.11 KRV CMT marker usn: 0x1 start scn: 0x0000.00178fd4
Reference:
http://www.juliandyke.com/Internals/Redo/Redo.html