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Power BI / AAS Model Optimization
This document discusses optimizing Power BI and Analysis Services (AAS) data models. It outlines the required tools for reviewing and optimizing models, including DAX Studio, Vertipaq Analyzer, Tabular Editor, and Best Practice Analyzer. The document provides steps for initial review of table sizes, column sizes and cardinality, and DAX expressions. It also lists best practices for data model design like star schema, only including needed data, and simplifying reporting and naming. Resources for learning more about optimization and troubleshooting performance are also included.
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Power BI / AAS Model Optimization
- 1. Power BI /AAS data model optimization 101 Dan English, Microsoft - Data & AI Cloud Solution Architect August 23, 2021
- 2. Speaker Background Dan English Cloud SolutionArchitect Microsoft http://denglishbi.wordpress.com @denglishbi • Published Author / Contributing Editor
- 3. Agenda • Required Tools •Steps / Process • Model Review • Best Practices • Resources • Questions
- 4. Required Tools • DAXStudio • Vertipaq Analyzer • Tabular Editor • Best Practice Analyzer Optional • Performance Analyzer (Power BI Desktop)
- 5. Initial Step –get metrics & review DAX Studio • Connect to data model • Export metrics (vpax file) Vertipaq Analyzer • Open vpax file • Review tables, columns, DAX expressions
- 6. Key items forReview • Table sizes (typically target large / Fact tables) • Column sizes, cardinality, and data types • DAX Expressions • Calculated columns • DISTINCTCOUNT, basic math and division (use DIVIDE), multiple measure references in a measure (use variables) • Evaluate which columns are not referenced in DAX or used in relationships (from Fact table)
- 7. Best Practices Star Schema design Onlyinclude what is needed for reporting / analysis Perform logic / calculations downstream to source as much as possible Only load granularity needed for reporting Watch out for precision and type of data Reduce / simplify reporting Naming and DAX model references
- 8. Downloads • DAX Studio(portable zip version available too) • Vertipaq Analyzer • Tabular Editor • Business Ops Installer (External Tools installer) • One Tool to Install them ALL - (powerbi.tips)
- 9. Resources • My CHECKLISTfor troubleshooting Power BI Performance - YouTube • Understand star schema and the importance for Power BI - Power BI | Microsoft Docs • Data models within Azure Analysis Services and Power BI | Azure Blog and Updates | Microsoft Azure • Best Practice Analyzer for Tabular Editor Update 5/20 • best practices | Search Results | (desertislesql.com) (3 part series) • 10 Best practice tips to improve your Tabular Model performance | BI4ALL - Turning Data Into Insights • (11) Guy in a Cube - YouTube (best practice search) • Improve Power BI Performance by Optimizing DAX | MAQ Software
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