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1 Dagens Nyheter Swedens largest morning newspaper. DN.se has 1.2 million unique visitors per week. A normal day about 150 000 pageviews per hour. Stefan.

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Presentation on theme: "1 Dagens Nyheter Swedens largest morning newspaper. DN.se has 1.2 million unique visitors per week. A normal day about 150 000 pageviews per hour. Stefan."— Presentation transcript:

1 1 Dagens Nyheter Swedens largest morning newspaper. DN.se has 1.2 million unique visitors per week. A normal day about pageviews per hour. Stefan Näslund Editorial IT Manager

2 2 Rubrik Källa: Autumn 2008 New publishing platform to be launched februari Upgrade to Polopoly 9. Redesign No old code. Many new features. New hardware.

3 Continious change Agile development, scrum New content New features Multiple third parties

4 4 Rubrik Källa: My problem Would the new site be fast enough? How is ”fast enough” defined? During load? What kind of load? Normal ; High, Peak What type of load ?

5 5 Rubrik Källa: Remember this? Major events will come, but when ? All major newsites broke down

6 6 Rubrik Källa: The solution Load testing in production environment. 1. Define performance goals. 2. Translate into load test scenarios. 3. Do loadtest during night time – in production! 4. Fix errors, analyze logs, test again. 5. Monitor continually using same tool.

7 7 Rubrik Källa: The results The Loadtests where run during jan/feb. - Some initial errors were found, - Applications tuned for improved performance and stability ( front end cache and cc user sessions ) Capacity planning All the primary goals met with the current HW ->Bandwidth is the limiting factor.

8 Before / After -> On going effort

9 9 Rubrik Källa: Advice Define goals for load tests. Can you interpret the load test results? Monitor reported problems specifically.


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