Oracle Log Mining

Logminer based on package:

[[email protected] ~]$ ls/u01/oracle/10g/rdbms/admin/dbmslm.sql-->DBMS_LOGMNR Tool

/u01/oracle/10g/rdbms/admin/dbmslm.sql

[Email protected] ~]$ Ls/u01/oracle/10g/rdbms/admin/dbmslmd.sql-->dbms_logmnr_d tool

/u01/oracle/10g/rdbms/admin/dbmslmd.sql

To tap an online log:

Sql> Execute Dbms_logmnr.add_logfile

('/u01/oracle/oradata/orcl/redo03.log ', dbms_logmnr.new);

Sql> Execute Dbms_logmnr.add_logfile

('/u01/oracle/oradata/orcl/redo02.log ', dbms_logmnr.addfile);

Sql> Execute DBMS_LOGMNR.START_LOGMNR

(options=>dbms_logmnr.dict_from_online_catalog+dbms_logmnr.committed_data_only);

Sql> Select Sql_redo,sql_undo from v$logmnr_contents where table_name= ' EMP ';

Sql> CREATE TABLE TLog as SELECT * from V$logmnr_contents;

Table created.

Sql> exec DBMS_LOGMNR.END_LOGMNR ();

PL/SQL procedure successfully completed.

Mining Archive logs:

sql> Delete from dept where deptno=70;

1 row deleted.

Sql> commit;

Commit complete.

sql> Delete from dept where deptno=60;

1 row deleted.

Sql> commit;

Commit complete.

sql> alter system switch logfile;

System altered.

sql> alter system switch logfile;

System altered.

sql> alter system switch logfile;

System altered.

Sql> select name from V$archived_log;

NAME

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

/u01/oracle/flash_recovery_area/orcl/archivelog/2015_04_01/o1_mf_1_2_bkp6s8vy_.arc

/u01/oracle/flash_recovery_area/orcl/archivelog/2015_04_01/o1_mf_1_3_bkp6sdbz_.arc

/u01/oracle/flash_recovery_area/orcl/archivelog/2015_04_01/o1_mf_1_4_bkp6sjbz_.arc

Sql> Show Parameter Utl_file

NAME TYPE VALUE

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

Utl_file_dir string

Sql> alter system set utl_file_dir= '/home/oracle/' scope=spfile;

System altered.

sql> shutdown Immediate

Database closed.

Database dismounted.

ORACLE instance shut down.

Sql> Startup

ORACLE instance started.

Total System Global area 285212672 bytes

Fixed Size 1218968 bytes

Variable Size 88082024 bytes

Database buffers 188743680 bytes

Redo buffers 7168000 bytes

Database mounted.

Database opened.

sql> exec dbms_logmnr_d.build (' Log.ora ', '/home/oracle/', dbms_logmnr_d.store_in_flat_file);

PL/SQL procedure successfully completed.

sql> exec dbms_logmnr.add_logfile ('/u01/oracle/flash_recovery_area/orcl/archivelog/2015_04_01/o1_mf_1_12_ Bkr48xy4_.arc ', dbms_logmnr.new);

PL/SQL procedure successfully completed.

sql> exec dbms_logmnr.add_logfile ('/u01/oracle/flash_recovery_area/orcl/archivelog/2015_04_01/o1_mf_1_11_ Bkr48wsk_.arc ', dbms_logmnr.addfile);

PL/SQL procedure successfully completed.

sql> exec dbms_logmnr.add_logfile ('/u01/oracle/flash_recovery_area/orcl/archivelog/2015_04_01/o1_mf_1_10_ Bkr48vcs_.arc ', dbms_logmnr.addfile);

PL/SQL procedure successfully completed.

sql> exec dbms_logmnr.start_logmnr (dictfilename=> '/home/oracle/log.ora ');

PL/SQL procedure successfully completed.

Sql> Select Sql_undo,sql_redo from v$logmnr_contents where table_name= ' EMP ';

No rows selected

Sql> exec DBMS_LOGMNR.END_LOGMNR ();

PL/SQL procedure successfully completed.

Oracle Log Mining