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where it counts Pedro Cardoso – Senior Consultant @ OutSystems

Ricardo Soeiro – Software Engineer @ OutSystems

Measuring Performance

http://bit.ly/performancewhereitcounts

www.outsystems.com

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Why we care about

performance

1

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Great Apps =

Usability + Design

+

Performance

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Chrome user adoption

0%

20%

40%

60%

80%

100%

2009 2010 2011 2012 2013

Google Chrome Other Browsers

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Are you losing money?

• Slow application Lower productivity

• Google: + 500ms – 20% searches

• Amazon: + 100ms – 1% sales

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How to measure performance?

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What you can measure

How to measure performance?

What users feel

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RUM (Real User

Monitoring)

• Find problems outside the server scope

• Monitor directly from the browser

• What the users actually experience

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Measure User Satisfaction

APDEX (Application Performance inDEX)

T 4T

8 sec 2 sec 0

Satisfied Tolerating Frustrated

𝐴𝑃𝐷𝐸𝑋 =𝑆𝑎𝑡𝑖𝑠𝑓𝑖𝑒𝑑 𝑐𝑜𝑢𝑛𝑡 +

𝑇𝑜𝑙𝑒𝑟𝑎𝑡𝑖𝑛𝑔 𝑐𝑜𝑢𝑛𝑡2

𝑇𝑜𝑡𝑎𝑙 𝑝𝑎𝑔𝑒 𝑣𝑖𝑒𝑤𝑠

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Measure User Satisfaction

an example

Satisfied Tolerating Frustrated

𝐴𝑃𝐷𝐸𝑋 =120 +

252

150= 0.88

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Debugging User

Screams

2

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Integration Horror Story

User

Front End

Network Switch Load Balancer

Front End

External SystemsDatabase Server

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Query Horror Story

User

Front End

Network Switch Load Balancer

Front End

External SystemsDatabase Server

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Looping Horror Story

User

Front End

Network Switch Load Balancer

Front End

External SystemsDatabase Server

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A Switch Horror Story

User

Front End

Network Switch Load Balancer

Front End

External SystemsDatabase Server

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What can go wrong?

User

Front End

Network Switch Load Balancer

Front End

External SystemsDatabase Server

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Preventing User Screams

• R.U.M.: Measure where it counts

• Be proactive: monitor trends

• Fix problems before screaming starts

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Monitoring

in LifeTime

3

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Performance Monitor!

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How does it work?

App UserFront End

Database Server

DevOps

LifeTime

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DEMO

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Don’t let it burn!

User

Front End

Network Switch Load Balancer

Front End

External SystemsDatabase Server

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Start monitoring!

User

Front End

Network Switch Load Balancer

Front End

External SystemsDatabase Server

LifeTimeDevOps

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http://bit.ly/performancewhereitcounts

www.outsystems.com