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1 #Dynatrace
gottesheim
wolfgang.gottesheim@dynatrace.com
Wolfgang Gottesheim
Performance Metrics for your Delivery PipelineJAX London, October 14
2 #Dynatrace
HOW
WEBSITE
Is 10PM a good time
to find out about performance
problems?
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When do YOU find performance problems?
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? ? ?
Unit/IntegrationTests
Acceptance Tests
CapacityTests
ReleaseDevelopers
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When to find them?
Requirements /
Specification /
Design
(Load) Test /
QA /
Acceptance
Deployment /
Production /
Maintenance
Development
(Load)Test/
QA /
Acceptance
De
v
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Development
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st Deployment /
Production /
Maintenance
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p
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p
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p
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Test
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Dev
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7 #Dynatrace
The Challenge
» Performance is not a band aid!
» Architecture has enormous influence!
You have to continuously ensure yourperformance requirements are met!
"I couldn't help but notice your pain."
"My pain?"
"It runs deep. Share it with me!"
(Star Trek V)
8 #Dynatrace
“But we have tests”
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Software testing tells us that our system
» meets the requirements that guided its design and development,
» responds correctly to all kinds of inputs,
» performs its functions within an acceptable time,
» is sufficiently usable,
» can be installed and run in its intended environments, and
» achieves the general result its stakeholders desire.
Source: Wikipedia
What are we learning from our tests?
10 #Dynatrace
Let’s look at the tests we run
Unit Tests
Integration Tests
Acceptance Tests
Load Tests
Meets requirements
Responds correctly to input
Performs in acceptable time
Usability
Deployment
Achieves Correct Result High effort (have to be created and maintained)
Only possible at a rather late development phase
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The Goal
Unit Tests Integration Tests
Acceptance Tests
Load Tests
Meets requirements
Responds correctlyto input
Performs in acceptable time
Usability
Deployment
Achieves Correct Result
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What you usually get
Measuring Performance of Unit and Integration Tests
[junit] Running com.dynatrace.sample.tests.FastUnitTest
[junit] Tests run: 15, Failures: 0, Errors: 0, Time elapsed: 34 sec
[junit] Running com.dynatrace.sample.tests.SlowUnitTest
[junit] Tests run: 17, Failures: 0, Errors: 1, Time elapsed: 2,457 sec
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Basic: Test duration
I don’t like endsWith – I like regex!
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N+1 Queries
Metrics: • # SQL Executions / Request• # of “same” SQL Executions
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Ignoring Architectural Rules
Metrics: • # SQL Executions / Request
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High Number of Requests to Backend System
Metrics: • # Calls to 3rd party system
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Memory Leak
Still crashing…
Problem
fixed!Fixed Version
Deployed
Metrics: • Heap Size• # Objects allocated
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Too Many Exceptions
Metrics: • # Exceptions
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Unnecessary work
Caching framework updates content that is never used
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What you currently measure
What you could measure
Performance Metrics in your CI
# Test FailuresOverall Duration
# calls to API# executed SQL statements# Web Service Calls# JMS Messages# Objects Allocated# Exceptions# Log MessagesExecution Time of Tests…
24 #Dynatrace
We should not forget about ACCEPTANCE tests
25 #Dynatrace
Large Web Sites
17! JS Files – 1.7MB in Size
Useless Information!Even might be a security risk!
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Missing Resources Cause Delays
46! HTTP 403 Requests for images on the landing page
Lots of time “wasted” due to roundtrips that just result in a 403
Metrics: HTTP 4xx & 5xxTotal Number of Resources
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SLOW or Failing 3rd Party Content
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What you currently measure
What you could measure
Performance Metrics in your CI
# Test FailuresOverall Duration
# calls to API# executed SQL statements# Web Service Calls# JMS Messages# Objects Allocated# Exceptions# Log MessagesExecution Time of Tests# HTTP 4xx/5xxRequest/Response SizePage Load/Rendering Time…
29 #Dynatrace
Starting from…
Production Environment
Developers CI Server TestingEnvironment
Release
? ?
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…or maybe…
Production Environment
Developers CI Server TestingEnvironment
Release
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We get to…
Commit Stage
Automated Acceptance
Testing
Automated CapacityTesting
ReleaseDevelopers
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Performance as a Quality Gate
Automated collection of performance metrics in
test runs
Comparison of performance metrics
across builds
Automated analysis of performance metrics to
identify outliers
Automated notifications on performance issues in tests
Measurements accessible and shareable across teams
Actionable data through deep transactional insight
Integration with build automation tools and
practices
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And finally make PERFORMANCE part of our Continuous Delivery Process
Commit Stage
Automated Acceptance
Testing
Automated CapacityTesting
ReleaseDevelopers
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Performance Scalability
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Collaborate VerifyMeasure
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When CAN we find performance problems?
37 #Dynatrace37
Unit/IntegrationTests
Acceptance Tests
CapacityTests
ReleaseDevelopers
38 #Dynatrace
Who Cares About Performance?
Developers?
Architects?
Testers?
Operators?
Business?
39 #Dynatrace
Everone!
Developers
Architects
Testers
Operators
Business
40 #Dynatrace
But remember:
41 #Dynatrace
Check out our trialhttp://bit.ly/jaxtrial
Stop by the Dynatrace
booth!
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