Web Performance Monitoring Tales
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The document emphasizes the importance of web performance optimization (WPO) as a critical business factor, outlining best practices for improving website loading times through techniques like using CDNs, reducing HTTP requests, and optimizing front-end assets. It also discusses monitoring strategies to identify and address performance issues, suggesting tools for both external and internal monitoring. Key takeaways include the need for continuous performance measurement and the importance of action plans to address any performance degradations.
Web Performance Monitoring Tales
- 1. 5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVEDWeb Performance Monitoring TalesThe Internet, A Series of Tubes…Mehdi Daoudi – CEO Catchpoint Systems – mehdi@catchpoint.com
- 2. We all want to make web sites load faster!Performance is the 5th P of the Marketing Mix, Performance is a Business Differentiator!Bad performance: Not good for businessNot good for brandsNot good for end usersNot good for IT5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED2Welcome and Thank you!
- 3. WPO Best PracticesCATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED3Low Effort:Reduce # HTTP requests if possible
- 4. Use a CDN (Edgecast, Cotendo, Akamai, Cdnetworks, NetDNA)
- 6. HTTP 1.1 Keep Alives (and make sure it is working!)
- 7. Gzip CSS and JS
- 8. Audit your CDN, make sure the right headers are in place at your origin server!
- 9. Audit your Web front end servers to ensure Gziping, Keep Alives
- 10. Caching : Expire Headers / Public for CDN to ensure Cache-ability
- 11. Remove ETAGS
- 12. Chunked transfer encoding Medium Effort:CSS @ the Top
- 13. JS at the bottom
- 14. Minify JS and CSS
- 15. Optimize images
- 16. CSS SpriteMore Complex:Outclip, ControlJS… Asynchronously loading JS / Lazy LoadingWPO Applied5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED4
- 17. WPO Applied – It works!!!5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED5
- 18. Using a CDN improves East Coast Times5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED6Introduction of CDN
- 19. 80 / 20 Rule5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED7Steve Souders:“80% of the end-user response time is spent on the front-end. Start there.”Well when things go wrong it’s more like 20 / 80!
- 20. Monitoring5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED8DB monitoringRUMExternal MonitoringInternal MonitoringNetwork
- 21. Monitoring5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED9
- 22. Collection of Plumbing Tales5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED10
- 23. My site is down … HELP!!!!5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED11100 % Downtime
- 24. My site is down … HELP!!!!5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED12Varnish issuing 302 to cyber-drain100 % Downtime
- 25. Clogged Internet Tube? 5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED13
- 26. Clogged Internet Tube? 5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED14Latency increase
- 27. Clogged Internet Tube? 5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED15Latency Increase by 100 ms
- 28. What !@&(&@# is happening?5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED1620 % Packet loss
- 29. DNS huh? What is DNS? 5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED17Adserving company has performance & discrepancies issues… DNS Provider Change
- 30. DNS huh? What is DNS? 5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED18Adserving company has performance & discrepancies issues… Moved to another DNS provider! DNS Provider Change
- 31. Midnight call with Customer…Houston we have a problem!5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED19New Load Balancer Config – Loss of Stickiness
- 32. Impossible… I can not have downtime5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED20CDN handing over Dead NS server
- 33. Web Site Performance X2. Why?5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED21
- 34. Oops … bad httpd.conf file5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED22Apache configuration!No More Keep Alives
- 35. Why am I seeing spikes…?let’s see under the hood…5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED23
- 36. Why am I seeing spikes…?let’s see under the hood…5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED24Database Slownessimpacts user experience
- 37. External Monitoring5/18/11CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED25Simulates End User activityMeasures the end to end transactionContinuous, 24x7Detect anomaliesTrack performance degradations / improvements over timeMeasures every Component
- 38. Monitoring Best PracticesCATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED26Monitor VS Measure:Monitor: High Frequency (Up / Down)
- 39. Measure: High Fidelity (30-60 Minutes / Browser based or good Emulation)Monitor every Component:Setup monitoring for every key provider / hostname
- 40. DNS
- 41. Origin servers
- 42. if Multiple datacenters, monitor them individuallyBaseline very often, track improvement or degradationKeep an eye on performance during critical business hours (Volume)Review Daily / WeeklyAlerts on % Delta
- 43. CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED27Toolbox
- 44. ToolboxCATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED28StandaloneChrome – Developer tool
- 45. IE 9 – Developer tool
- 46. Fiddler
- 47. HTTPWatch
- 48. Yslow
- 49. Dynatrace
- 50. Wireshark
- 51. Firebug
- 52. Dig for DNS
- 54. Google Page speed (http://pagespeed.googlelabs.com/)
- 55. Closing the LoopCATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED29Rule #1: You can't improve what you can't measure. Monitor Action Plan Optimize Monitor… do it againRule #2:It isn’t over till it’s over. And it’s never over.
- 56. CATCHPOINT SYSTEMS . CONFIDENTIAL . © 2011 . ALL RIGHTS RESERVED30THANK YOU.http://blog.catchpoint.com@catchpoint