Alistair Croll, Interop conference faculty and Coradiant's VP of product management gives an unbiased, top down view of Web performance monitoring. This informative look at Web measurement business goals, operating processes, tools and metrics will give you a solid understanding of the issues, without a product pitch. Coradiant is the leader in Web Performance Monitoring. The award-winning TrueSight Real-User Monitor allows organizations to watch what matters to their business, by delivering accurate, detailed information on the performance and integrity of Web applications in real time. Incident management, service-level management and change-impact management are three key capabilities. TrueSight watches any web or enterprise web application and lets site operators identify problems more quickly, isolate root-cause faster, and effect fixes more quickly than anything else on the market. With TrueSight, every part of an IT organization is made more effective, responsive and productive. For more information, visit http://www.coradiant.com.

1. Best Practices in Web Performance Monitoring Alistair A. Croll VP Product Management and Co-Founder

2. So you want to monitor things.

3. But there are too many toys out there…

4. A top-down approach to web performance monitoring Metrics Tools Operating processes Business goals

5. A top-down approach to web performance monitoring Metrics Tools Operating processes Business goals Start here! Simplify & interpret

6. What goals? (in plain English)

8. They can use it

10. They’re happy & productive

13. I can fix it fast

17. I worry about what matters

22. Okay, got the goals

23. But how do I make this real?

24. A top-down approach to web performance monitoring Metrics Tools Operating processes Business goals Goals drive processes

26. Keep people informed

27. Reporting & overcommunication: Know the audience Network operations Network latency, throughput, retransmissions, service outages Marketing Abandonment, conversion, demographics Server operations Host latency, server errors, session concurrency Security Anomalies, fraudulent activity Finance Capacity planning, time out of SLA, IT repair costs Different stakeholders The same data sources

28. I have enough juice

30. Capacity planning

31. We all agree on what’s “good enough”

34. I know where problems are…

36. … and I can figure out what’s behind them

38. Problem localization & resolution

40. Problem localization & resolution

41. A top-down approach to web performance monitoring Metrics Tools Operating processes Business goals Select tools that make processes work best

42. Tools: The three-legged stool Synthetic Real User Device

45. Synthetic testing: Checking it yourself

48. OK, I’ve got the tools. What do I look at?

49. A top-down approach to web performance monitoring Metrics Tools Operating processes Business goals Use the right metrics for the audience & question

58. User satisfaction: Satisfied, tolerating, frustrated What metric? What function? Target performance Impact on users Percentile data

59. Averages lie: Use percentiles

60. Averages lie: Use percentiles Average varies wildly, making it hard to threshold properly or see a real slow-down.

61. Averages lie: Use percentiles 80 th percentile only spikes once for a legitimate slow-down (20% of users affected)

62. Averages lie: Use percentiles Setting a useful threshold on percentiles gives less false positives and more real alerts

63. A top-down approach to web performance monitoring Metrics Tools Operating processes Business goals

64. Questions? acroll<at>coradiant.com (514) 944-2765