PL/SQL Camp MeetUp 2019 - Oracle Partitioning for Developers
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The document presents an overview of Oracle partitioning by discussing its concepts, benefits, challenges, and implementation scenarios. It covers various types of partitioning techniques including range, list, hash, and interval partitioning, as well as the execution plans and maintenance operations involved. The conclusion emphasizes the importance of careful planning due to the potential impacts on performance with partitioning.
PL/SQL Camp MeetUp 2019 - Oracle Partitioning for Developers
- 1. 1© The Pythian Group Inc., 2018 Franky Weber Faust October 2019 WHY, WHEN AND HOW TO DO IT ORACLE PARTITIONING FOR DEVELOPERS
- 2. 2© The Pythian Group Inc., 2018 2 FRANKY WEBER FAUST ● Senior Oracle Database Consultant at Pythian ● 29 years old ● Writer at OTNLA and Lore Data Blog ● Speaker at conferences around the world ● High Availability specialist ● Performance researcher ● Exadata, RAC, DataGuard, GoldenGate ● AcroYoga practitioner ● Guitar player loredata.com.br
- 3. 3© The Pythian Group Inc., 2018 3 E-mail: faust@pythian.com or franky@loredata.com.br Blog: http://loredata.com.br/blog Facebook: https://facebook.com/08Franky.Weber Instagram: https://www.instagram.com/frankyweber/ Twitter: https://twitter.com/frankyweber LinkedIn: https://linkedin.com/in/frankyweber/en Oracle ACE: https://bit.ly/2YxU6bK Keep in touch
- 5. © 2017 Pythian. Confidential 5 Years in Business 20 Pythian Experts in 35 Countries 400+ Current Clients Globally 350+
- 6. © 2017 Pythian. Confidential 6 WHY THIS PRESENTATION?
- 7. 7© The Pythian Group Inc., 2018 AGENDA 7 ● Partitioning concept ● Background ● Partitioning benefits (Why) ● Implementation scenarios (When) ● Types of partitioning (When) ● Range, List, Interval e Hash partitioning (How) ● The execution plan
- 8. © 2017 Pythian. Confidential 8 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
- 9. © 2017 Pythian. Confidential 9 BACKGROUND HISTORY ● Since Oracle 8 (1997) ● Requires extra licensing and EE ● Manual partitioning using views ● New features every new release ● 19c Hybrid partitioning (Hive, HDFS, External file) Partition Maintenance on multiple partitions, Asynchronous global index maintenance, Zone maps Oracle 12cR2 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 Auto-list and Multicolumn list partitioning, Partitioned external tables
- 10. © 2017 Pythian. Confidential 10 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
- 11. © 2017 Pythian. Confidential 11 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
- 12. © 2017 Pythian. Confidential 12 TYPES OF PARTITIONING (HOW) ● 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 ● *Hybrid Partitioning (19c)*
- 13. © 2017 Pythian. Confidential 13 RANGE PARTITIONING (HOW)
- 14. © 2017 Pythian. Confidential 14 RANGE PARTITIONING (HOW)
- 15. © 2017 Pythian. Confidential 15 LIST PARTITIONING (HOW)
- 16. © 2017 Pythian. Confidential 16 LIST 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 HASH PARTITIONING (HOW)
- 26. © 2017 Pythian. Confidential 26 HASH PARTITIONING (HOW)
- 27. © 2017 Pythian. Confidential 27 HASH PARTITIONING (HOW)
- 28. © 2017 Pythian. Confidential 28 HASH PARTITIONING (HOW)
- 29. © 2017 Pythian. Confidential 29 HASH PARTITIONING (HOW)
- 30. © 2017 Pythian. Confidential 30 HASH PARTITIONING (HOW)
- 31. © 2017 Pythian. Confidential 31 HASH PARTITIONING (HOW)
- 32. © 2017 Pythian. Confidential 32 INTERVAL PARTITIONING (HOW)
- 33. © 2017 Pythian. Confidential 33 INTERVAL PARTITIONING (HOW)
- 34. © 2017 Pythian. Confidential 34 INTERVAL PARTITIONING (HOW)
- 35. © 2017 Pythian. Confidential 35 INTERVAL PARTITIONING (HOW)
- 36. © 2017 Pythian. Confidential 36 INTERVAL PARTITIONING (HOW)
- 37. © 2017 Pythian. Confidential 37 THE EXECUTION PLAN
- 38. © 2017 Pythian. Confidential 38 THE EXECUTION PLAN
- 39. © 2017 Pythian. Confidential 39 THE EXECUTION PLAN
- 40. © 2017 Pythian. Confidential 40 THE EXECUTION PLAN
- 41. © 2017 Pythian. Confidential 41 THE EXECUTION PLAN
- 42. © 2017 Pythian. Confidential 42 THE EXECUTION PLAN
- 43. © 2017 Pythian. Confidential 43 THE EXECUTION PLAN
- 44. © 2017 Pythian. Confidential 44 THE EXECUTION PLAN
- 45. © 2017 Pythian. Confidential 45 THE EXECUTION PLAN
- 46. © 2017 Pythian. Confidential 46 THE EXECUTION PLAN
- 47. © 2017 Pythian. Confidential 47 THE EXECUTION PLAN
- 48. © 2017 Pythian. Confidential 48 THE EXECUTION PLAN
- 49. © 2017 Pythian. Confidential 49 THE EXECUTION PLAN
- 50. © 2017 Pythian. Confidential 50 THE EXECUTION PLAN
- 51. © 2017 Pythian. Confidential 51 PARTITIONING MAINTENANCE OPERATIONS online
- 52. © 2017 Pythian. Confidential 52 PARTITIONING MAINTENANCE OPERATIONS
- 53. © 2017 Pythian. Confidential 53 PARTITIONING MAINTENANCE OPERATIONS online
- 54. © 2017 Pythian. Confidential 54 CONCLUSION ● Range Partitioning, Hash Partitioning, List Partitioning, Interval Partitioning ● 12cR2 onwards can perform 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?
- 55. © The Pythian Group Inc., 2018 55 Stay in touch! ● E-mail: franky@loredata.com.br or faust@pythian.com ● Blog: http://loredata.com.br/blog ● Facebook: https://facebook.com/08Franky.Weber ● Instagram: https://www.instagram.com/frankyweber/ ● Twitter: https://twitter.com/frankyweber ● LinkedIn: https://linkedin.com/in/frankyweber/en ● Oracle ACE: https://bit.ly/2YxU6bK
- 56. © The Pythian Group Inc., 2018 5656© The Pythian Group Inc., 2018