Oracle日志挖掘

Posted 2020-09-08 ChavinKing

logminer基于包：

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

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

[[email protected] ~]$ ls /u01/oracle/10g/rdbms/admin/dbmslmd.sql-->dbms_logmnr_d工具

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

挖掘联机日志：

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.

挖掘归档日志：

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.