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@Dynatrace
- Get Dynatrace: http://bit.ly/dtpersonal- More YouTube Tutorials: http://bit.ly/dttutorialsHosted by: Andreas Grabner (@grabnerandi & [email protected])Ask questions using the Questions Tab – or post on answers.dynatrace.com
Four Practices for Fixing Your Top .NET Performance Problems
@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
WHERE? HOW?
WHAT?
HOW?
WHAT?
Browser Issue?
Bandwidth Issue? OS Issue?
Geo Issue?Why Frustrated?
Beautiful but Heavy Pages
32! JavaScript files
5MB! In Size
W3C Resource Timings!
#1: # of Resources
#2: Total Page Size
#3: Involved Domains
10 @Dynatrace
Too Many Queries crash
Undersized Pools
Online Banking: Slow Balance Check
1.69m (=101s!) To Check Balance!
87% spent in IIS 600! SQL Executions
#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
#2 What about these SQL Executions?Finding: EVERY SQL
statement is executed on ITS OWN Connection!
Tip: Look at “GetConnection”
#2 SQL Executions! continued …
#1: Same SQL is executed 67! times
#2: NO PREPARATION because everything
executed on new Connection
Lessons Learned!
ASP.NET Worker Thread Pool Sizing!
DB Connection PoolsMore Efficient SQL
#1: Idle vs. Busy Threads
#2: # SQLs / Request
#3: # GetConnection
Bad Synchronization
Load vs. Memory vs Response Time vs. ThreadsIncreasing 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)
96% Synchronization TimeMonitor.Enter: By far biggest
performance contributor
Called from GetStatus and _GetDebugStatus. Why also from Debug method? Bug?
Excessive File Attribute Access second hotspot
Can FileExist check be cached to reduce
File Access?
File Access next hotspots
#1: # of Threads vs # Incoming Requests
#2: Time Spent in Sync
#3: Time Spent in I/O
@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
@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
@Dynatrace
DemoInstrumenting an ASP.NET Application
@Dynatrace
DemoAnalyze Application Performance
@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: [email protected] • Share Your PurePath: http://bit.ly/sharepurepath
Reminders
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 Blogapplication-performance-blog.com
