Download as PDF, PPTX
![complacency
Com·pla·cen·cy[kuhm-pley-suhn-see]
a feeling of quiet pleasure or
security, often while unaware of
some potential danger, defect, or
the like;](https://image.slidesharecdn.com/velocity2013-final-131114112552-phpapp02/75/Velocity-EU-2013-What-is-the-velocity-of-an-unladen-swallow-33-2048.jpg)
More Related Content
![[DevFest Strasbourg 2025] - NodeJs Can do that !!](https://cdn.slidesharecdn.com/ss_thumbnails/devfeststrasbourg2025-nodejscandothat-251127142731-da65b6fd-thumbnail.jpg?width=640&height=640&fit=bounds)
![[BDD 2025 - Full-Stack Development] Digital Accessibility: Why Developers nee...](https://cdn.slidesharecdn.com/ss_thumbnails/fs-digitalaccessibilitywhydevelopersneedtoknowandcarein2025-251127011019-0674441d-thumbnail.jpg?width=640&height=640&fit=bounds)
![[BDD 2025 - Mobile Development] Crafting Immersive UI with E2E and AGSL Shade...](https://cdn.slidesharecdn.com/ss_thumbnails/md-craftingimmersiveuiwithe2eandagslshaderveronicaputrianggraini-251124030840-0c677f44-thumbnail.jpg?width=640&height=640&fit=bounds)
![[BDD 2025 - Artificial Intelligence] AI for the Underdogs: Innovation for Sma...](https://cdn.slidesharecdn.com/ss_thumbnails/ai-aifortheunderdogsinnovationforsmallbusinesses-251124030839-72a599a4-thumbnail.jpg?width=640&height=640&fit=bounds)
Velocity EU 2013 What is the velocity of an unladen swallow?
- 1.
- 2.
- 4.
- 5.
- 6.
- 7.
- 9.
- 10. Photo courtesy ofFlorian Wieder wiederdesign.com
- 11.
- 13.
- 14.
- 16.
- 17.
- 18.
- 19. 0 29/10/2010 CPUPerSession DBCallsPerSession 0.6 60 0.5 50 0.4 40 0.3 30 0.2 20 0.1 10 0 DB Calls PerSession 0.7 22/10/2010 0.8 15/10/2010 08/10/2010 01/10/2010 24/09/2010 17/09/2010 10/09/2010 03/09/2010 27/08/2010 20/08/2010 13/08/2010 06/08/2010 30/07/2010 CPU Per Session (sec) Database Usage per Web Session 80 70
- 20.
- 21. User All Limit Checks Traffic counters Queuing iRule Increment/ Decrement Data Group Site | Limit Original client request is passed from queue back to F5 so customer goes to the exact page they originally requested when queue is inactive Site Limit Checks Does Cookie Exist? Yes No Does All Sites Limit Exist? Yes No All Sites Limit Exceeded? Yes No Does Site Limit Exist? No Yes Site Limit Exceeded? No Infrastructure B Infrastructure A Main Site When client timer reaches zero Server controlled timer served to client Yes
- 22.
- 23. One site didn’tgo down….
- 24. Traffic Profile 29thOctober 2010 60 1 months revenue in 1 day 10 days revenue per hour for 2 hours 40 30 20 10 Time 23:00 22:00 21:00 20:00 19:00 18:00 17:00 16:00 15:00 14:00 13:00 12:00 11:00 10:00 09:00 08:00 0 07:00 Traffic multiple 50
- 25.
- 26.
- 27.
- 28. Photo courtesy ofFlorian Wieder wiederdesign.com
- 29.
- 30. Traffic Profile 14thNovember 2010 60 Spikes within 15 seconds of TV advert start 40 30 Traffic boost in ad breaks when we had no active advertisement 20 10 Time 23:00 22:00 21:00 20:00 0 19:00 Traffic multiple 50
- 31.
- 32.
- 33. complacency Com·pla·cen·cy[kuhm-pley-suhn-see] a feeling ofquiet pleasure or security, often while unaware of some potential danger, defect, or the like;
- 34.
- 36.
- 37.
- 38.
- 53.
- 60.
- 63.
- 65. WebPageTest Private Instance • • https://sites.google.com/a/webpagetest.org/docs/private-instances http://andydavies.me/blog/2012/09/18/how-to-create-an-all-in-one-webpagetest-private-instance/ HTTPArchivePrivate Instance • We will publish the HTTPArchive customization we have developed – watch this space! WebPageTest / Jenkins mash-up • http://www.webwob.com/html/webpagetest.html Events • • • http://velocityconf.com/velocityeu2013/public/schedule/detail/32943 http://www.webperfdays.org/events/2013-london/index.html http://www.meetup.com/London-Web-Performance-Group/
- 66.
- 67.
- 68.