Bring your website down with Gatling

Presentation from Vodqa workshop, Pune 2014

Transcript

1. Bring your website down with Gatling 1 / 22
2. Not quite literally :) 2 / 22
3. Why would we want to do that? 3 / 22
4. To Test Production-Readiness Can we meet SLA? Are we meeting required throughput? like request/rec Will app sustain the normal & peak loads 4 / 22
5. Benchmarking CPU utilization Memory utilization Network bandwidth usage 5 / 22
6. Finding Performance Issues Like memory leaks Index missing (in DB) Caching issues 6 / 22
7. Capacity Planning How many servers would I need What will be configuration 7 / 22
8. Types Load testing Stress testing Spike testing Endurance/Soak and many more... 8 / 22
9. Server-side performance vs Client-side performance 9 / 22
10. Client Side Performance DOM rendering time Network issues / latency JavaScript execution time CSS/JS compression/optimiaztion Image optimization 10 / 22
11. Tools YSlow Google PageSpeed 11 / 22
12. Server Side Performance Resource consumption Throughput and a lot more... 12 / 22
13. What are the options? 13 / 22
14. Command Line Utilities Shell script with curl/wget fighting a battle with needle Apache bench good for very simple use cases Seige bit more sophisticated than AB but not full blown 14 / 22
15. More Programmable Solutions Locust python JMeter java but more gui centric Gatling JVM with scala DSL 15 / 22
16. User Journeys Tool should be able to emulate real users with realistic load Example: 1. I login, 2. I browse for an item 3. I add it to my cart 4. I proceed to checkout 5. I pay 6. I logout 16 / 22
17. Scenarios User regestration will happens less frequently than order checkout Should test accordingly With desired load pattern 17 / 22
18. Complexities Sessions Cookies user journeys reporting/insights into key metrices 18 / 22
19. Metrices Requests request/sec distribution of urls Response time 90%ile, 95%ile avg/mean min/max Result failed vs passed vs timed out status codes Users active sessions 19 / 22
20. Demo Clone the gatling-stater project 20 / 22
21. Thank You @kdabir github.com/kdabir 21 / 22
22. References http://msdn.microsoft.com/en-us/library/bb924356.aspx https://github.com/kdabir/gatling-starter http://gatling.io 22 / 22