Monitoring Page Splits in SQL Server

Transcription

1 Monitoring Page Splits in SQL Server Guy Glantser, CEO, Madeira Data Solutions Moderated By: Jay O'Donnell Presenting Sponsors

2 Technical Assistance If you require assistance during the session, type your inquiry into the question pane on the right side. Maximize your screen with the zoom button on the top of the presentation window. Please fill in the short evaluation following the session. It will appear in your web browser.

3 Thank You to Our Presenting Sponsors Empower users with new insights through familiar tools while balancing the need for IT to monitor and manage user created content. Deliver access to all data types across structured and unstructured sources. Quest helps IT Professionals simplify administration tasks so they can focus on the evolving needs of their businesses. Combined with its commitment to help companies protect today s investment while planning for the future, Quest continues to deliver the most comprehensive solutions to monitor, manage, protect and replicate database environments IDERA designs powerful software with one goal in mind to solve customers most complex challenges with easy-to-use solutions. IDERA s awardwinning SQL Server database solutions and multiplatform database, application and cloud monitoring tools ensure your business never slows down. SentryOne empowers Microsoft data professionals to achieve breakthrough performance across physical, virtual and cloud environments. We develop solutions to monitor, diagnose, and optimize SQL Server performance, including Plan Explorer, the query-tuning tool with more than 100,000 downloads. Supporting Sponsor

4 Attend PASS Summit to Grow Your Career Connect with a global network of 250,000+ data professionals PASS Summit is the largest conference for technical professionals who leverage the Microsoft Data Platform. November 6-9 Seattle, WA PASSsummit.com The Community

5 Guy Glantser Founder & CEO Microsoft Data Platform MVP Community Leader SQL Server Radio Co-Host

6 Monitoring Page Splits in SQL Server Guy Glantser, CEO, Madeira Data Solutions Presenting Sponsors

7 Agenda What is a Page Split? Why should We Care about Page Splits? How can We Monitor Them?

8 Why is There a Clothes Line on Stage?

9 OK, Very Funny! Now, What is a Page Split?

10 Why should We Care about Page Splits? They affect performance of INSERT and UPDATE operations They affect performance of scan operations (but not seek operations) Excessive page splits in the system can indicate a performance issue They can help us determine the appropriate fill factor for every index

11 How can We Monitor Them? 1 2 Performance Monitor Profiler 3 Dynamic Mgmt Objects 4 Extended Events

12 Enough Bullshit! Let s See the Demo

13 How can We Monitor Them? Performance Monitor Profiler Dynamic Mgmt Objects Extended Events

14 Summary It s impossible to monitor page splits in SQL Server. When Microsoft says Page Splits, they actually mean Page Allocations.

15 Just Kidding!

16 How can We Monitor Them? 5The Transaction Log

17 Demo, Please

18 There is Even a Better Way 6 Extended Events

19 Summary When Microsoft says Page Splits, they actually mean Page Allocations The only way to monitor real page splits prior to SQL Server 2012 is using the undocumented function sys.fn_dblog The best way to monitor real page splits since SQL Server 2012 is using Extended Events ( transaction_log event) By monitoring index performance statistics, including page splits, you can optimize each index individually and improve performance

20 Best Practices Rebuild Indexes During Maintenance Window Monitor Page Splits Adjust the Fill Factor Also Monitor Recompilations Use Query Store

21 QUESTIONS?

22 Coming up next Modernizing Mission-Critical Apps with SQL Server 2017 on Windows, Linux and Docker Containers Marko Hotti

23 THANK YOU FOR Presenting Sponsors

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