[置顶] How to dump redo log entry？

1.转储针对特定数据块（4号文件的第10-20号数据块）修改的 redo entry
select file#,name,blocks from v$datafile;

     FILE# NAME                                                   BLOCKS

---------- -------------------------------------------------- ----------

         1 +DATA/test/datafile/system.269.829746597                89600

         2 +DATA/test/datafile/sysaux.270.829746621                76800

         3 +DATA/test/datafile/undotbs1.271.829746639              25600

         4 +DATA/test/datafile/users.273.829746667                   640

-转储 test 表第4行所在的数据块的修改记录         

SQL> select t.rowid,t.* from scott.test t;

ROWID                  DEPTNO DNAME          LOC

------------------ ---------- -------------- -------------

AAAPtpAAEAAAADbAAA         10 ACCOUNTING     NEW YORK

AAAPtpAAEAAAADbAAB         20 RESEARCH       DALLAS

AAAPtpAAEAAAADbAAC         30 SALES          CHICAGO

AAAPtpAAEAAAADbAAD         40 OPERATIONS     BOSTON

SQL> select DBMS_ROWID.ROWID_OBJECT(rowid) as object#,

  2         DBMS_ROWID.ROWID_RELATIVE_FNO(rowid) as file#,

  3         dbms_rowid.rowid_block_number(rowid) as block#,

  4         DBMS_ROWID.ROWID_ROW_NUMBER(rowid) as row#

  5         from scott.test;

OBJECT#      FILE#     BLOCK#       ROW#

---------- ---------- ---------- ----------

     64361          4        219          0

     64361          4        219          1

     64361          4        219          2

     64361          4        219          3

--当前属于 current 状态的 online redo log

SQL> select * from v$log;

GROUP#    THREAD#  SEQUENCE#      BYTES  BLOCKSIZE    MEMBERS ARC STATUS           FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- --------- ------------ ---------

         1          1          1   10485760        512          2 YES INACTIVE                430256 25-OCT-13       450682 28-OCT-13

         2          1          2   10485760        512          2 YES INACTIVE                450682 28-OCT-13       453557 28-OCT-13

         3          1          3   10485760        512          2 NO  CURRENT                 453557 28-OCT-13   2.8147E+14

         

--修改 scott.test 表中 deptno 为 40 的记录进行测试

SQL> select * from scott.dept;

DEPTNO DNAME          LOC

---------- -------------- -------------

        10 ACCOUNTING     NEW YORK

        20 RESEARCH       DALLAS

        30 SALES          CHICAGO

        40 OPERATIONS     BOSTON

SQL> update scott.test set LOC='BEIJING' where deptno=40;

1 row updated.

SQL> commit;

Commit complete.

SQL> select * from scott.test;

DEPTNO DNAME          LOC

---------- -------------- -------------

        10 ACCOUNTING     NEW YORK

        20 RESEARCH       DALLAS

        30 SALES          CHICAGO

        40 OPERATIONS     BEIJING

        

--转储 redo entry，确保 redo log 没有切换

SQL> select * from v$log;

GROUP#    THREAD#  SEQUENCE#      BYTES  BLOCKSIZE    MEMBERS ARC STATUS           FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- --------- ------------ ---------

         1          1          1   10485760        512          2 YES INACTIVE                430256 25-OCT-13       450682 28-OCT-13

         2          1          2   10485760        512          2 YES INACTIVE                450682 28-OCT-13       453557 28-OCT-13

         3          1          3   10485760        512          2 NO  CURRENT                 453557 28-OCT-13   2.8147E+14

SQL> select * from v$logfile;

GROUP# STATUS  TYPE    MEMBER                                             IS_

---------- ------- ------- -------------------------------------------------- ---

         1         ONLINE  +DATA/test/onlinelog/group_1.266.829746583         NO

         1         ONLINE  +FRA/test/onlinelog/group_1.261.829746585          YES

         2         ONLINE  +DATA/test/onlinelog/group_2.267.829746587         NO

         2         ONLINE  +FRA/test/onlinelog/group_2.262.829746589          YES

         3         ONLINE  +DATA/test/onlinelog/group_3.268.829746591         NO

         3         ONLINE  +FRA/test/onlinelog/group_3.263.829746593          YES

6 rows selected.

SQL> alter system dump logfile '+FRA/test/onlinelog/group_3.263.829746593' dba min 4 219 dba max 4 219;

System altered.

--获取转储文件的路径

 col value for a60

 SQL>

SQL>  select * from  v$diag_info;

INST_ID NAME                                               VALUE

---------- -------------------------------------------------- ------------------------------------------------------------

         1 Diag Enabled                                       TRUE

         1 ADR Base                                           /u01/app/oracle

         1 ADR Home                                           /u01/app/oracle/diag/rdbms/test/test

         1 Diag Trace                                         /u01/app/oracle/diag/rdbms/test/test/trace

         1 Diag Alert                                         /u01/app/oracle/diag/rdbms/test/test/alert

         1 Diag Incident                                      /u01/app/oracle/diag/rdbms/test/test/incident

         1 Diag Cdump                                         /u01/app/oracle/diag/rdbms/test/test/cdump

         1 Health Monitor                                     /u01/app/oracle/diag/rdbms/test/test/hm

         1 Default Trace File                                 /u01/app/oracle/diag/rdbms/test/test/trace/test_ora_4160.trc

         1 Active Problem Count                               1

         1 Active Incident Count                              4

转储指定 SCN 的 redo entry

SQL> select dbms_flashback.get_system_change_number from dual;

GET_SYSTEM_CHANGE_NUMBER

------------------------

                  455005

SQL> update scott.test set LOC='BOSTON' where deptno=40;

1 row updated.

SQL> commit;

Commit complete.

SQL> select * from scott.test;

DEPTNO DNAME          LOC

---------- -------------- -------------

        10 ACCOUNTING     NEW YORK

        20 RESEARCH       DALLAS

        30 SALES          CHICAGO

        40 OPERATIONS     BOSTON

SQL> select dbms_flashback.get_system_change_number from dual;

GET_SYSTEM_CHANGE_NUMBER

------------------------

                  455020

                  

alter system dump logfile '+FRA/test/onlinelog/group_3.263.829746593' scn min 455005 scn max 455020;

SQL>  select * from v$diag_info where NAME ='Default Trace File';

INST_ID NAME                                               VALUE

---------- -------------------------------------------------- ------------------------------------------------------------

         1 Default Trace File                                 /u01/app/oracle/diag/rdbms/test/test/trace/test_ora_4160.trc

         

转储指定 RBA 的 redo entry

SQL> select group#,sequence#,BYTES/BLOCKSIZE as block# from v$log;

GROUP#  SEQUENCE#     BLOCK#

---------- ---------- ----------

         1          1      20480

         2          2      20480

         3          3      20480

alter system dump logfile '+FRA/test/onlinelog/group_3.263.829746593' rba min 3 1 rba max 3 10;

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作者：xiangsir

原文链接：http://blog.csdn.net/xiangsir/article/details/13503089

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MSN：xiangsir@hotmail.com