Oracle Partitioning for DBAs and Developers
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This document discusses Oracle partitioning for DBAs and developers. It begins with an introduction of the presenter and an agenda. It then covers partitioning concepts, background/history, benefits including increased availability and performance, implementation scenarios, types of partitioning like range and hash, how to implement range, list, interval and hash partitioning, partitioning maintenance operations, and concludes with a discussion of new features in Oracle releases.
Oracle Partitioning for DBAs and Developers
- 1. 1© The Pythian Group Inc., 2018 MAY 2018 WHY, WHEN AND HOW TO DO IT ORACLE PARTITIONING FOR DBAS AND DEVELOPERS
- 2. 2© The Pythian Group Inc., 2018 2 FRANKY WEBER FAUST ● Senior Oracle Database Consultant at Pythian ● 27 years old ● Writer at OTNLA and Lore Data Blog ● Speaker at some conferences ● High Availability specialist ● Performance researcher ● Exadata, RAC, DataGuard, Grid Infrastructure, GoldenGate
- 3. © 2017 Pythian. Confidential 3 Years in Business 20 Pythian Experts in 35 Countries 400+ Current Clients Globally 350+
- 4. 4© The Pythian Group Inc., 2018 AGENDA 4 ● Partitioning concept ● Background ● Partitioning benefits (Why) ● Implementation scenarios (When) ● Types of partitioning (When) ● Range, List, Interval e Hash partitioning (How) ● The execution plan ● Partitioning maintenance operations* ● Historical data archiving* ● Converting partitions*
- 5. © 2017 Pythian. Confidential 5 PARTITIONING CONCEPTS ● Break down a table/index into smaller pieces ● Partition Key ● Single or multicolumn ● Up to 16 columns ● Unique values are not required ● Every partition is a segment ● Tables ● Heap tables ● Index-organized tables ● Indexes ● Materialized Views ● Clusters ● Performance ● Partition Pruning
- 6. © 2017 Pythian. Confidential 6 BACKGROUND HISTORY ● Since Oracle 8 ● Requires extra licensing and EE ● Manual partitioning using views ● New features every new release Oracle 12cR2 Auto-list and Multicolumn list partitioning, Partitioned external tables Table creation for partition exchange, read-only partitions, Filtered partition maintenance, Online table conversion to partitioned table Oracle 18c Online Merging of Partitions and Subpartitions Parallel Partition-Wise SQL Operations Modifying the Partitioning Strategy Partition Maintenance on multiple partitions, Asynchronous global index maintenance, Zone maps
- 7. © 2017 Pythian. Confidential 7 PARTITIONING BENEFITS (WHY) ● Increases availability of data ● Eases administration of large segments ● Might improve the performance of some queries ● Might reduce contention on hot OLTP segments
- 8. © 2017 Pythian. Confidential 8 IMPLEMENTATION SCENARIOS (WHEN) ● Large volume of data when administration becomes difficult ● Query performance on large tables suffers ● Buffer busy waits on high-concurrent tables ● Horizontal scalability in RAC ● Decreased storage cost ● Compression and row archival
- 9. © 2017 Pythian. Confidential 9 TYPES OF PARTITIONING (WHEN) ● Range Partitioning ● Dates and numbers are good candidates ● Upper boundary ● Hash Partitioning ● High-volume OLTP segments ● Data is evenly distributed across partitions ● List Partitioning ● Categories, colors, sports, brands ● Default values accepted ● Interval Partitioning ● Automated range partitions ● Reference Partitioning ● Relational model PK-FK ● Interval Reference Partitioning ● All child tables will be automatically maintained ● Virtual Column Based Partitioning
- 10. © 2017 Pythian. Confidential 10 RANGE PARTITIONING (HOW)
- 11. © 2017 Pythian. Confidential 11 RANGE PARTITIONING (HOW)
- 12. © 2017 Pythian. Confidential 12 LIST PARTITIONING (HOW)
- 13. © 2017 Pythian. Confidential 13 LIST PARTITIONING (HOW)
- 14. © 2017 Pythian. Confidential 14 HASH PARTITIONING (HOW)
- 15. © 2017 Pythian. Confidential 15 HASH PARTITIONING (HOW)
- 16. © 2017 Pythian. Confidential 16 HASH PARTITIONING (HOW)
- 17. © 2017 Pythian. Confidential 17 HASH PARTITIONING (HOW)
- 18. © 2017 Pythian. Confidential 18 HASH PARTITIONING (HOW)
- 19. © 2017 Pythian. Confidential 19 HASH PARTITIONING (HOW)
- 20. © 2017 Pythian. Confidential 20 HASH PARTITIONING (HOW)
- 21. © 2017 Pythian. Confidential 21 HASH PARTITIONING (HOW)
- 22. © 2017 Pythian. Confidential 22 HASH PARTITIONING (HOW)
- 23. © 2017 Pythian. Confidential 23 HASH PARTITIONING (HOW)
- 24. © 2017 Pythian. Confidential 24 HASH PARTITIONING (HOW)
- 25. © 2017 Pythian. Confidential 25 INTERVAL PARTITIONING (HOW)
- 26. © 2017 Pythian. Confidential 26 INTERVAL PARTITIONING (HOW)
- 27. © 2017 Pythian. Confidential 27 INTERVAL PARTITIONING (HOW)
- 28. © 2017 Pythian. Confidential 28 INTERVAL PARTITIONING (HOW)
- 29. © 2017 Pythian. Confidential 29 INTERVAL PARTITIONING (HOW)
- 30. © 2017 Pythian. Confidential 30 THE EXECUTION PLAN
- 31. © 2017 Pythian. Confidential 31 THE EXECUTION PLAN
- 32. © 2017 Pythian. Confidential 32 THE EXECUTION PLAN
- 33. © 2017 Pythian. Confidential 33 THE EXECUTION PLAN
- 34. © 2017 Pythian. Confidential 34 THE EXECUTION PLAN
- 35. © 2017 Pythian. Confidential 35 PARTITIONING MAINTENANCE OPERATIONS
- 36. © 2017 Pythian. Confidential 36 PARTITIONING MAINTENANCE OPERATIONS
- 37. © 2017 Pythian. Confidential 37 PARTITIONING MAINTENANCE OPERATIONS
- 38. © 2017 Pythian. Confidential 38 CONCLUSION ● Range Partitioning, Hash Partitioning, List Partitioning, Interval Partitioning ● 12cR2 onwards can do most partitioning operations online ● Performance problems in read or write operations can get better or worse with partitioning, so plan well ● New releases -> New features, it's been like that for years. ● Questions?
- 39. © 2017 Pythian. Confidential 39 STAY IN TOUCH! ● E-mail: faust@pythian.com ● Blog: http://loredata.com.br/blog ● Facebook: https://facebook.com/08Franky.Weber ● Twitter: https://twitter.com/frankyweber ● LinkedIn: https://linkedin.com/in/frankyweber/en ● Oracle ACE profile: https://apex.oracle.com/pls/apex/f?p=19297:4:::NO:4:P4_ID:17002