performance challenges along the continuous delivery pipeline - javaone 2014

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PERFORMANCE CHALLENGES ALONG THE CONTINUOUS DELIVERY PIPELINE

Wolfgang Gottesheim

Compuware APM Dynatrace

3 COMPANY CONFIDENTIAL – DO NOT DISTRIBUTE

Is 10PM a good time to find out

about performance

problems?

44

When do YOU find performance problems?


? ? ?Unit/Integration

TestsAcceptance

TestsCapacity

TestsReleaseDevelopers

77

When can we find them? When can we find them?

Requirements /Specification /

Design

(Load) Test / QA /

Acceptance

Deployment / Production / Maintenance

Development

(Load)Test/ QA /

Acceptance

Dev

TestDevelopment

Dev

Test

Deployment / Production / Maintenance

Dev

Test

Dep

Dev

Test

Dep

Dev

Test

Dep

Dev

Test

Dep

Dev

Test

Dep

Dev

Test

Dep

Dev

Test

Dep

Dev

Test

Dep

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The ChallengeThe Challenge

"I couldn't help but notice your pain."

"My pain?"

"It runs deep. Share it with me!"

(Star Trek V)

» Performance pain runs deep» Architecture has enormous influence! You have to continuously ensure your

performance requirements are met!


“But we have tests”

1010

What are we learning from our tests?What are we learning from our tests?

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

1111

Let’s look at the tests we runLet’s look at the tests we run

Unit TestsIntegration

TestsAcceptance

TestsLoad Tests

Meets requirements

Responds correctly to input

Performs in acceptable time

Usability Deployment Achieves Correct Result

Tests looking at non-functional aspects, but- High effort (have to be created and maintained)

- Only possible at a rather late development phase

Very focused on FUNCTIONAL aspects

1313

Focus on automatically analyzing performanceFocus on automatically analyzing performance

Unit Tests Integration Tests

Acceptance Tests

Load Tests

Meets requirements

Responds correctly to input

Performs in acceptable time

Usability Deployment Achieves Correct Result

1414

How can we measure performance of Unit and Integration tests?How can we measure performance of Unit and Integration tests?

What you usually get

[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

Looking at overall timings does not make sense But what does?

1616

Basic: Test durationBasic: Test duration

I don’t like endsWith – I like regex!

1717

N+1 QueriesN+1 Queries

Metrics: • # SQL Executions / Request• # of “same” SQL Executions

1818

Ignoring Architectural RulesIgnoring Architectural Rules

Metrics: • # SQL Executions /

Request per Tier

1919

High Number of Requests to Backend SystemHigh Number of Requests to Backend System

Metrics: • # Calls to Web Service

2020

Memory LeakMemory Leak

Still crashing…

Problem fixed!

Fixed Version Deployed

Metrics: • Heap Size• # Objects allocated

2121

Too Many ExceptionsToo Many Exceptions

Metrics: • # Exceptions

2323

What you currently measure

What you should measure

Performance Metrics in your CI

2424


# Test FailuresOverall Duration

Execution Time per test# calls to API# executed SQL statements# Web Service Calls# JMS Messages# Objects Allocated# Exceptions# Log Messages…

What you currently measurePerformance Metrics in your CI

2525

We should not forget about

ACCEPTANCE tests

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Large Web SitesLarge Web Sites

17! JS Files – 1.7MB in Size

Useless Information!Even might be a security risk!

2727

Missing Resources Cause DelaysMissing 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

2828

SLOW or Failing 3rd Party ContentSLOW or Failing 3rd Party Content

2929


Performance Metrics in your CI # Test Failures

Overall Duration

Execution Time per test# calls to API# executed SQL statements# Web Service Calls# JMS Messages# Objects Allocated# Exceptions# Log Messages# HTTP 4xx/5xxRequest/Response SizePage Load/Rendering Time…

What you currently measure

3030

Starting from…Starting from…

Production Environment

Developers CI Server TestingEnvironment

Release

3131

…or maybe……or maybe…

Production Environment

Developers CI Server TestingEnvironment

Release

3232

We get to…We get to…

Commit Stage

Automated Acceptance

Testing

Automated CapacityTesting

ReleaseDevelopers

3333

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

3434

PERFORMANCE as part of our Continuous Delivery ProcessPERFORMANCE as part of our Continuous Delivery Process

Commit Stage

Automated Acceptance

Testing

Automated CapacityTesting

ReleaseDevelopers

3535

Performance Scalability

3636

Collaborate VerifyMeasure

3737

When CAN we find

performance problems?

3838

Unit/IntegrationTests

Acceptance Tests

CapacityTests

ReleaseDevelopers

4040

Who Cares About Performance?Who Cares About Performance?

Developers?

Architects?

Testers?

Operators?

Business?

4141

Everyone!Everyone!

Developers

Architects

Testers

Operators

Business

4242

But remember:

4343

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4545

How can this look in real life?

4646

Performance Focus in Test AutomationPerformance Focus in Test Automation

Analyzing All Unit / Performance Tests

Analyzing Metrics such as DB Exec Count

Jump in DB Callsfrom one Build to the

next

4747


Cross Impact of KPIs

4848


Here is the difference!

Compare Build that shows BAD Behavior!

With Build that shows GOOD Behavior!

4949


Embed your Architectural Results in Jenkins

5050


CalculateUserStats is the new Plugin that

causes problems

5151

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Get your demo and a T-Shirt at

Booth #5107!

