1. Azure SQL Database Lessons Learned From the Trenches Best practices, Tips and Tricks on monitoring and improving performance.
Fernando Cobo José Manuel Jurado Díaz
Technical Support Engineer Support Escalation Engineer
@jmJuradoDiaz

2. BIG Thanks to SQLSatLima sponsors

3. Special thanks

4. 1st Lesson Learned: Playing a Role calling Microsoft Support
8/8/ :16 PM
2nd Lesson Learned: Tips and Tricks for Connectivity and Performance
1st Lesson Learned: Playing a Role calling Microsoft Support
© 2014 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

5. Introduction COSTA RICA Amazing Microsoft Support Engineer
Name: Fernando Cobo
Job Title:
Azure SQL DB Support Engineer
Other Known Activities:
SQL Saturday
Rol Play:
Amazing Microsoft Support Engineer
COSTA RICA

6. Introduction SPAIN .NET Developer with water up to his neck...
Name: José Manuel Jurado Díaz
Twitter: @jmJuradoDiaz
Job Title:
Azure SQL DB Support Escalation Engineer
Subject Matter Expert on Azure SQL DB
Other Known Activities:
SQL Saturday, TechReady, SQL Nexus, Azure Global BootCamp
Rol Play:
.NET Developer with water up to his neck...
SPAIN

7. Background Check Are you working with Azure?
Are you a DBA or Developer?

8. Common Azure SQL DB Performance Issues
8/8/2019
Common Azure SQL DB Performance Issues
This Photo by Unknown Author is licensed under CC BY-SA-NC
© 2014 Microsoft Corporation. All rights reserved. Microsoft, Windows, and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

9. Common Perf Issues Becoming More Complex
8/8/2019
Common Perf Issues
Becoming More Complex
Query tuning, investigating execution plans
Query Timeouts
Blocking
Sizing Database Server
How to convert DTU - Price x Performance comparison - VCore
Elastic Database Tools – Horizontal Sharding
Frequently Simple
Outdated statistics
Missing Indexes
Throttling – Max concurrent Logins/Requests/Sessions
© 2014 Microsoft Corporation. All rights reserved. Microsoft, Windows, and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

10. Performance Troubleshooting Path
8/8/2019
Performance Troubleshooting Path
Always
Verify/Update Statistics
Then
Investigate Missing Indexes
QDS
SQL Audit
QPI
Consider
Reducing Fragmentation levels
Queries
Sufficient DTU / vCore Level for your Workload?
Engage Support
We can help!
© 2014 Microsoft Corporation. All rights reserved. Microsoft, Windows, and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

11. The 02:05 AM Problem a.k.a.: Sunday
8/8/2019
The 02:05 AM Problem a.k.a.: Sunday
sys.dm_db_resource_stats, sys.resource_stas
© 2014 Microsoft Corporation. All rights reserved. Microsoft, Windows, and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

12. Common Azure SQL DB Connectivity Issues
8/8/2019
Common Azure SQL DB Connectivity Issues
This Photo by Unknown Author is licensed under CC BY-SA-NC
© 2014 Microsoft Corporation. All rights reserved. Microsoft, Windows, and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

13. Best Practices Configuration Main Points Prevention Retry-Logic
Connection String parameters
Execution
Command Timeout
Connect Retry Count
Monitor
How to monitor my connections

14. Best Practices – Configuration
Wrong DNS
DNS not updated, missing, invalid.
Outside: 1433
Inside: /
Ports outbound
Antivirus/Windows Firewall
Port 1433 is blocked as outbound
Ephemeral ports are not available
Client IP is blocked
Azure SQL Proxy is blocked or changed
Your ISP Provider
Public IP Azure VM
VM needs a Public IP
Geo-Replicated User
Orphaned Logins

15. Best Practices – Prevention
tcp:yourservername.database.windows.net,1433
Open/close the connection as fast as possible
Connection Timeout=30
Connection may fail – Retry Logic is key
- EF and NET.4.6.1
Latest version of ADO.NET, Microsoft JDBC, ODBC
Avoid idle connections – ConnectRetryInterval and ConnectRetryCount
Contained User instead of Logins
Try .. Catch for all connections and command executions
Connection Pooling
MultipleActiveResultSets

16. Best Practices – Execution
Avoid to use select * and return just needed rows
Execution timeout
Distributed transactions
Transaction.Scope
Cross-Queries
sp_execute_remote
UTC, Language
AT TIME ZONE
Language in the connection string
Short Batches
Indexes and Statistics

17. Best Practices – Monitoring
Internal Telemetry
SQL Auditing
SQL Connection Statistics and StopWatch
Query Data Store, QPI

18. Do you want to implement your own performance monitor?
8/8/2019
Do you want to implement your own performance monitor?
sys.dm_db_resource_stats, sys.resource_stas
© 2014 Microsoft Corporation. All rights reserved. Microsoft, Windows, and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

19. Questions.- Questions? 8/8/2019
© 2015 Microsoft Corporation. All rights reserved. Microsoft, Windows, and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

20. Rafflle
Raffle prizes at 17:50

21. Evaluation Session Eval: