Download as PDF, PPTX
Uploaded byJason Strate
How Do Non-Clustered Indexes Improve Performance?
The document discusses the role of non-clustered indexes in improving database performance, highlighting their value as additional access paths and their ability to enhance performance and stability. It provides insights into different index patterns and techniques, such as included columns and filtered indexes, while emphasizing the importance of not overusing indexes. The author, Jason Strate, offers resources and additional information for those looking to leverage indexing in their Microsoft BI and SQL Server environments.
More Related Content
Similar to How Do Non-Clustered Indexes Improve Performance?
How Do Non-Clustered Indexes Improve Performance?
- 1. How Do Non-Clustered IndexesImprove Performance?
- 2. Introduction Jason Strate e: jstrate@pragmaticworks.com e: jasonstrate@gmail.com b:www.jasonstrate.com t: StrateSQL Resources jasonstrate.com/go/indexing MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 3. About Pragmatic Works ā¢ ā¢ ā¢ ā¢ ā¢ ā¢ ā¢ Industryleaders in Microsoft BI and SQL Server Platform SQL Server Professionals - PASS Board of Directors, Speakers, Authors and MVPās National Sales Team Divided by Microsoft Territories National System Integrator (NSI) Gold Certified in Business Intelligence and Data Platform Platform Modernization/Safe Passage Premier Partner for PDW SI Partner Program MS PDW Partner of Year FY13 Frontline Partnership Partner of the Year for Big Data Executive sponsor - Andy Mouacdie, WW sales director PDW ā¢ ā¢ Over 7,200 customers worldwide Over 186,000 people in PW database for demand generation MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 4.
- 5.
- 6.
- 8. Agenda Introduction Just The Cluster Non-Clustered Index Patterns MAKINGBUSINESS INTELLIGENT Value of NonClustered Summary www.pragmaticworks.com
- 9. Introduction Just The Cluster Value of NonClustered NonClustered Index Patterns Summary CLUSTEREDINDEX OR HEAP MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 10. Introduction Just The Cluster Value of NonClustered NonClustered Index Patterns Summary JUSTTHE CLUSTER MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 11. Clustered ā¢ Default datastorage ā¢ Sorted data storage ā One or more columns ā Data and index stored together ā¢ Fragmentation ā¢ Operations ā Clustered index scan ā Clustered index seek ā Key Lookup
- 12. The Clustered IndexProblem MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 13. The Clustered IndexProblem MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 14. What About Non-KeyColumns? MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 15. What About Non-KeyColumns? MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 16. What About Non-KeyColumns? MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 17. Demo CLUSTERED INDEX PROBLEM MAKINGBUSINESS INTELLIGENT www.pragmaticworks.com
- 18. Left searching foranswersā¦
- 19. Got Problems? ā¢ Locks āLock Escalation ā Blocking ā Deadlocking ā¢ Resource ā CPU ā Memory ā Storage MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 20. Introduction Just The Cluster Value of NonClustered NonClustered Index Patterns Summary VALUEOF NON-CLUSTERED MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 21. ā¢ Sorted keyvalues āOne or more columns āKey values only āPointers to Heap/Clustered Index rows ā¢ Secondary data access ā Bridge to the data ā¢ Operations ā Index scan ā Index seek MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 22. Additional Index Magic ā¢Included Columns ā Add data pages to index ā Bring in the data pages! ā¢ Filtered Indexes ā Reduce the index pages ā¢ Data Compression ā Row/Page ā Reduce the index pages MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 23. The Non-Clustered MAKING BUSINESSINTELLIGENT www.pragmaticworks.com
- 24. What About Non-KeyColumns? SELECT ProductID, OrderQty FROM Sales.SalesOrderheader WHERE ProductID = 776 MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 25. What About Non-KeyColumns? SELECT ProductID, OrderQty FROM Sales.SalesOrderheader WHERE ProductID = 716 MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 26. What About Non-KeyColumns? SELECT ProductID, OrderQty FROM Sales.SalesOrderheader WHERE ProductID = 762 MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 27. Introduction Just The Cluster Value of NonClustered NonClustered Index Patterns Summary NON-CLUSTEREDINDEX PATTERNS MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 28. Non-Clustered Index Patterns Cover Up Team Up MAKINGBUSINESS INTELLIGENT Look Up www.pragmaticworks.com
- 29. Non-Clustered Index Patterns Cover Up Team Up MAKINGBUSINESS INTELLIGENT Look Up www.pragmaticworks.com
- 30. Non-Clustered Indexes -Cover Up CREATE INDEX IX_Sample ON Sales.SalesOrderheader (ProductID) MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 31. Non-Clustered Indexes -Cover Up SELECT ProductID FROM Sales.SalesOrderheader WHERE ProductID = 776 MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 32. Non-Clustered Indexes -Cover Up SELECT ProductID FROM Sales.SalesOrderheader MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 33. Non-Clustered Indexes -Cover Up CREATE INDEX IX_Sample ON Sales.SalesOrderheader (ProductID ,OrderQty) MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 34. Non-Clustered Indexes -Cover Up SELECT ProductID, OrderQty FROM Sales.SalesOrderheader WHERE ProductID = 716 MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 35. Non-Clustered Indexes -Cover Up SELECT ProductID, OrderQty FROM Sales.SalesOrderheader MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 36. Non-Clustered Index Patterns Cover Up Team Up MAKINGBUSINESS INTELLIGENT Look Up www.pragmaticworks.com
- 37. Non-Clustered Indexes āLook Up CREATE INDEX IX_Sample ON Sales.SalesOrderheader (ProductID) MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 38. Non-Clustered Indexes āLook Up SELECT ProductID, CarrierTrackingNumber FROM Sales.SalesOrderheader WHERE ProductID = 776 MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 39. Non-Clustered Indexes āLook Up SELECT ProductID, CarrierTrackingNumber FROM Sales.SalesOrderheader WHERE ProductID = 776 MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 40. Non-Clustered Index Patterns Cover Up Team Up MAKINGBUSINESS INTELLIGENT Look Up www.pragmaticworks.com
- 41. Non-Clustered Indexes āTeam Up CREATE INDEX IX_Sample ON Sales.SalesOrderheader (ProductID) MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 42. Non-Clustered Indexes āTeam Up CREATE INDEX IX_Sample ON Sales.SalesOrderheader (CarrierTrackingNumber) MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 43. Non-Clustered Indexes āTeam Up SELECT ProductID, CarrierTrackingNumber FROM Sales.SalesOrderheader WHERE ProductID = 776 AND CarrierTrackingNumber = ā4911-403C-98ā MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 44. Non-Clustered Indexes āTeam Up SELECT ProductID, CarrierTrackingNumber FROM Sales.SalesOrderheader WHERE ProductID = 776 AND CarrierTrackingNumber = ā4911-403C-98ā MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 45. Demo NON-CLUSTERED INDEX PATTERN MAKINGBUSINESS INTELLIGENT www.pragmaticworks.com
- 46. Introduction Just The Cluster Value of NonClustered NonClustered Index Patterns Summary SUMMARY MAKINGBUSINESS INTELLIGENT www.pragmaticworks.com
- 47. Summary 1. Clustered indexesare not enough 2. Non-clustered indexes provide additional paths 3. Learn how to leverage all of the properties 4. Performance and stability enhanced through non-clustered indexes 5. Donāt go overboardā¦ too much of a good thing MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 48. Learn More AboutIndexes MAKING BUSINESS INTELLIGENT www.pragmaticworks.com
- 49. For more informationā¦ Name:Jason Strate Email: jstrate@pragmaticworks.com Blog: www.jasonstrate.com Resource: jasonstrate.com/go/indexing Products BI products to covert to a Microsoft BI platform and simplify development on the platform. Services Speed development through training, and rapid development services from Pragmatic Works. Foundation Helping those who do not have the means to get into information technology achieve their dreams.