An introduction to log miner tool in oracle

1. Oracle
Log miner
Student: Reza Sadeghi
Advisor: Dr. Abasi
Course: Advanced database
Myemails: im_rezasadeghi@yahoo.com
reza.sadeghi@imamreza.ac.ir
April 2014

2.  Why we use it?
 What is Log Miner?
 Background processes
 Requirements
 Steps
 Kind of dictionaries
 Schematic view
 Main work
 References
Oracle log miner
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3.  Pinpointing when a logical corruption to a
database, such as errors made at the application
level, may have begun.
 Determining what actions you would have to take
to perform fine-grained recovery at the
transaction level.
 Performance tuning and capacity planning
through trend analysis.
 Performing post auditing.
Oracle log miner
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4. It enables us to query online and archived
redo log files through a SQL interface.
Oracle log miner
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5. insert into "UNKNOWN"."OBJ# 45522
"("COL 1","COL 2","COL 3","COL 4") values
(HEXTORAW('45465f4748'),
HEXTORAW('546563686e6963616c20577269746572'),
HEXTORAW('c229'),HEXTORAW('c3020b'));
?
INSERT INTO HR.JOBS(JOB_ID, JOB_TITLE,
MIN_SALARY, MAX_SALARY)
VALUES('IT_WT','Technical Writer', 4000, 11000);
Oracle log miner
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6. Oracle log miner
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7. 7
Arch 1
Logging and Archiving
Archive Log FilesRedo Log Files
Arch 2
Arch 3
Arch 4
Arch 5
Arch 6
LGWR
Group 1
Group 3
Group 2
ARCH
Oracle log miner

8.  Preinstallation:
Source and mining database
Log Miner dictionary
All redo log files
 Setup:
Supplemental logging
archive log mode
Oracle log miner
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9. 1. Specify a Log Miner dictionary.
2. Specify a list of redo log files for analysis.
3. Start Log Miner.
4. Request the redo data of interest.
5. End the Log Miner session.
Oracle log miner
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10. Oracle log miner
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11. Oracle log miner
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EXECUTE DBMS_LOGMNR.START_LOGMNR(- OPTIONS =>
DBMS_LOGMNR.DICT_FROM_ONLINE_CATALOG + -
DBMS_LOGMNR.COMMITTED_DATA_ONLY + -
DBMS_LOGMNR.PRINT_PRETTY_SQL);

12. Oracle log miner
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13. 1. Oracle 11g introduction to oracle SQL and
PL/SQL written by E.Momen
2. www.oracle.com
3. www.asktom.com
4. www.juliandyke.com
5. http://www.idevelopment.info
6. www.dba-oracle.com
7. Oracle LogMiner prepared by Martin
Frauendorfer
Oracle log miner
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