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 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 Näslund Editorial IT Manager
2 Rubrik Källa: Autumn 2008 New publishing platform to be launched februari 17 2009. Upgrade to Polopoly 9. Redesign No old code. Many new features. New hardware.
Continious change Agile development, scrum New content New features Multiple third parties
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 Rubrik Källa: Remember this? Major events will come, but when ? All major newsites broke down
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 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.