Magic With Oracle - Presentation
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This document provides tips and tricks for database administrators (DBAs) related to Oracle database administration. It discusses using the DBMS_ADVANCED_REWRITE package to transform queries and improve performance, techniques for data masking and protecting sensitive data, using data versioning and repositories, making smaller copies of production databases using Data Pump, various Data Pump techniques including cloning users and changing tablespaces, and using the Data Recovery Advisor. It also provides information on the Oracle ACE program for community members.
Magic With Oracle - Presentation
- 1. Road To Success MAKING MAGIC WITH ORACLE – SOME MORE TIPS & TRICKS FOR DBA’s.
- 2. SUCCESS Next Exit Road To Success MAKING MAGIC WITH ORACLE – SOME TIPS & TRICKS FOR DBA’s.
- 3. Making Magic With Oracle Francisco Munoz Alvarez Oracle ACE Director 8/9/10g/11g OCP, RAC OCE, AS OCA, E-Business OCP, SQL/PLSQL OCA, Oracle 7 OCM Oracle 7, 11GR2 and OVM 3.1 Beta Tester IOUC LA Spokesperson ITIL Certified 2010 Oracle ACE Director of the year by Oracle Magazine Blog: oraclenz.wordpress.com - Email: [email protected] Twitter : fcomunoz Revera Oracle Professional Services Manager www.revera.co.nz
- 4. Born here Grow up here Got Married Here DBIS - Copyright 2010 Mature here Now Living here 4
- 5. A Cool Trick Who never had a problem with a SQL that is killing your Database Performance and you can’t fix it because it’s running from an external closed application that you or your developers can’t touch? Since Oracle version 10 this is a problem of the past, now you can easy solve this kind of problem using the DBMS_ADVANCED_REWRITE package, which allow you to transform/customize queries on the fly, changing for example one query with bad explain plan for another one with a good explain plan.
- 6. DBMS_ADVANCED_REWRITE Before you become too excited, please remember the following restrictions: • It does not work with bind variables.(Alternative solution at Metalink Doc ID. 392214.1) • Only works for the SELECT statement. • Does not work when the base table is modified through DML.
- 7. Data Masking with Oracle • Important to protect your sensible data in Dev/QA/Test Environments • Protect your data when sending it to outside your company. Normal Product s used for Data Masking? OEM / Grid Control Data Pump http://www.oracle.com/technetwork/database/datapump11g2009-transform-133936.pdf
- 8. What is Data Masking
- 9. Data Repository and Version Control As a DBA, I’m always looking for proactive ways to allow me to be prepared in case of a disaster strike or if an emergency release rollback is required (I love to use always the “What if” methodology), and due to these reasons, have a metadata repository and version control of it is always useful .
- 10. Creating Smaller Copies of Production That is a very common task for a DBA, you are always having a task to create a copy of your Database ( for development or test purpose ) but your destination server don’t have enough space to create a full copy of it! This can be easily solved with Data Pump, for this example, let say that you only have space for 70% of your production database, now to know how to proceed, we need to decide if the copy will contain metadata only (no data/rows) or if it will include the data also.
- 11. More Data Pump Stuff • • • • Clone a User Change Tablespaces Change Datafile Structure Flashback Consistent Backups
- 12. More Data Pump Stuff • Flashback Consistent Backups By default expdp is consistent only for the table that is currently being exported. You can use: FLASHBACK_TIME or FLASHBACK_SN Note: On 11g the CONSISTENT parameter was deprecated , At 11g you can use the FLASHBACK_TIME=systimestamp to get data pump export to be consistent to a single point in time. Since 11.2 you can also use the legacy mode option to use the old parameter CONSISTENCY=y
- 13. Data Recovery Advisor RMAN> LIST FAILURE; RMAN> ADVISE FAILURE; RMAN> REPAIR FAILURE PREVIEW; RMAN> REPAIR FAILURE; RMAN> REPAIR FAILURE NOPROMPT;
- 14. PROGRAM The Oracle ACE Program is designed to recognize and reward members of the Oracle Technology and Applications communities for their contributions to those communities. These individuals are technically proficient (when applicable) and willingly share their knowledge and experiences. The program comprises two levels: Director. Oracle ACE and Oracle ACE The former designation is Oracle's way of saying "thank you" to community contributors for their efforts; we (and the community) appreciate their enthusiasm. The latter designation is for community enthusiasts who not only share their knowledge (usually in extraordinary ways), but also want to increase their community advocacy and work more proactively with Oracle to find opportunities for the same. In this sense, Oracle ACE is "backward looking" and Oracle ACE Director is "forward looking."
- 15. PROGRAM
- 17. Questions? More Information? Francisco Munoz Alvarez [email protected]
- 18. Thank you! Have a Nice Day And Remember to participate more with your local User Group