Four Practices to Fix Your Top .NET Performance Problems
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Inefficient Database Access, Inefficien Pool usage and Sizing, Bad Synchronization, Bad Web Page Design - these are the problems that crash .NET Apps. Learn how to analyze them and fix these problems
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Four Practices to Fix Your Top .NET Performance Problems
- 1. @Dynatrace - Get Dynatrace: http://bit.ly/dtpersonal - More YouTube Tutorials: http://bit.ly/dttutorials Hosted by: Andreas Grabner (@grabnerandi & agrabner@dynatrace.com) Ask questions using the Questions Tab – or post on answers.dynatrace.com Four Practices for Fixing Your Top .NET Performance Problems
- 2. @Dynatrace • Top Problems I’ve seen in the years thanks to http://bit.ly/sharepurepath • How to • Instrument ASP.NET, IIS and Common Mistakes • Process Performance Analysis: • CPU, Memory & Thread Hotspots • Monitoring through Windows Performance Counters • Application Performance Analysis • Error, Exception and Log Analysis • Database Hotspots: SQL + Bind Values, Connection Pool Information • Method Hotspots, Synchronous vs Asynchronous Executions • Monitoring Thread Pools and Other Queues using JMX • Live Q&A Agenda for Today
- 4. Browser Issue? Bandwidth Issue? OS Issue? Geo Issue?Why Frustrated?
- 8. 32! JavaScript files 5MB! In Size W3C Resource Timings!
- 9. #1: # of Resources #2: Total Page Size #3: Involved Domains
- 10. 10 @Dynatrace
- 11. Too Many Queries crash Undersized Pools
- 12. Online Banking: Slow Balance Check 1.69m (=101s!) To Check Balance! 87% spent in IIS 600! SQL Executions
- 13. #1 Time really spent in IIS? Tip: Elapsed Time tells us WHEN a Method was executed! Finding: Thread 32 in IIS waited 87s to pass control to Thread 30 in ASP.NET Tip: Thread# gives us insight on Thread Queues / Switches
- 14. #2 What about these SQL Executions? Finding: EVERY SQL statement is executed on ITS OWN Connection! Tip: Look at “GetConnection”
- 15. #2 SQL Executions! continued … #1: Same SQL is executed 67! times #2: NO PREPARATION because everything executed on new Connection
- 16. Lessons Learned! ASP.NET Worker Thread Pool Sizing! DB Connection Pools More Efficient SQL
- 17. #1: Idle vs. Busy Threads #2: # SQLs / Request #3: # GetConnection
- 20. Load vs. Memory vs Response Time vs. Threads Increasing Memory Avg Response Time: Increases over Time Max Response Time correlates with # Threads Max Response Time correlates with # Threads Load: System can’t handle constant load over time # of Worker Threads increase with constant load Layer Breakdown: Performance Problem is in their own code (Sync Time)
- 21. 96% Synchronization Time Monitor.Enter: By far biggest performance contributor Called from GetStatus and _GetDebugStatus. Why also from Debug method? Bug?
- 22. Excessive File Attribute Access second hotspot Can FileExist check be cached to reduce File Access? File Access next hotspots
- 23. #1: # of Threads vs # Incoming Requests #2: Time Spent in Sync #3: Time Spent in I/O
- 25. @Dynatrace • Get Dynatrace Personal License: http://bit.ly/dtpersonal • Download and Install from: http://bit.ly/dttrial • Watch the YouTube Tutorials: http://bit.ly/dttutorials • 2 Steps for Instrumenting .NET and IIS Agent • .NET Agent Configuration Tool to configure ASP.NET AppPool • Load Dynatrace IIS Web Server Agent Module • GO! Launch Your App! Analyze Results! Instrumenting ASP.NET & IIS
- 26. @Dynatrace • IIS not restarted after Agent Installation • IIS only loads AppPool when you access website • Loading 64bit instead of 32Bit Agent IIS Module • Firewall or DNS issues to YOURDTCOLLECTOR:9998 • Wrong TIERNAME leading to „Agent didnt match System Profile“ Most Common Mistakes
- 27. @Dynatrace Demo Instrumenting an ASP.NET Application
- 29. @Dynatrace • Meetups and User Groups: We are happy to present! • Feb 2016: SAP hybris Summit, Chef Seattle, Docker Meetup San Mateo, DT User Group in Pittsburgh and Cleveland … • Mar 2016: Zurich (Testing Day + Java Meetup), DevConf South Africa, DT User Groups in Detroit, Columbus and New York City • April 2016: STPCon, DT User Group in San Mateo • YouTube Channel: http://bit.ly/dttutorials • Dynatrace Personal: http://bit.ly/dtpersonal • Contact: agrabner@dynatrace.com • Share Your PurePath: http://bit.ly/sharepurepath Reminders
- 30. Participate in our Forum :: community.dynatrace.com Like us on Facebook facebook.com/dynatrace Follow us on LinkedIn linkedin.com/company/dynatrace Connect with us! Follow us on Twitter twitter.com/dynatrace Watch our Videos & Demos youtube.com/dynatrace Read our Blog application-performance-blog.com
Editor's Notes
- #2: Get Dynatrace: http://bit.ly/dtpersonal