Why Is My App SLOw? Defining Reliability in Platform Engineering • Jez Humble • GOTO 2023

This presentation was recorded at GOTO Aarhus 2023. #GOTOcon #GOTOaar https://gotoaarhus.com Jez Humble - SRE at Google Cloud & Lecturer at UC Berkeley @JezHumble RESOURCES https://continuousdelivery.com https://github.com/jezhumble https://linkedin.com/in/jez-humble https://twitter.com/jezhumble https://sre.google/resources ABSTRACT Platform engineering is all fun and games until platform customers start complaining about their apps running slowly. Is it the app code or the platform? This talk looks at how Google’s Serverless SRE team detects platform-level latency regressions before users, measures the impact of regressions, and tracks performance over time. We’ll discuss the limitations of SLOs in this context and how to take a statistical approach that gives a customer-centric picture of the performance of our platform instead. [...] TIMECODES 00:00 Intro 02:08 Serverless platform is amazing 05:56 "My app is slow" 08:14 The platform is slow 09:29 Total (end-to-end) latency distribution 10:54 Request delivery latency 12:37 Goal 13:39 Reliability in practice 17:09 Applying to the model 18:39 Stationarity 19:31 2-Sigma Technique 24:30 Mechanics 26:41 Overload score 28:08 Impact analysis 29:03 FAQ 31:56 Backtesting 33:21 Limitations 35:13 Other applications 35:20 Streamlined diagnosis 37:06 Approximate cohort A/B testing 37:33 Conclusions 40:02 Outro Download slides and read the full abstract here: https://gotoaarhus.com/2023/sessions/2661 RECOMMENDED BOOKS Nicole Forsgren, Jez Humble & Gene Kim • Accelerate • https://amzn.to/442Rep0 Kim, Humble, Debois, Willis & Forsgren • The DevOps Handbook • https://amzn.to/47oAf3l Jez Humble & David Farley • Continuous Delivery • https://amzn.to/452ZRky Jez Humble, Joanne Molesky & Barry O'Reilly • Lean Enterprise • https://amzn.to/47pcOXD https://twitter.com/GOTOcon https://www.linkedin.com/company/goto- https://www.facebook.com/GOTOConferences #SLO #SRE #ChaosEngineering #Serverless #PlatformEngineering #2Sigma #GoogleCloud #JezHumble #DevOps #Accelerate Looking for a unique learning experience? Attend the next GOTO conference near you! Get your ticket at https://gotopia.tech Sign up for updates and specials at https://gotopia.tech/newsletter SUBSCRIBE TO OUR CHANNEL - new videos posted almost daily. https://www.youtube.com/user/GotoConferences/?sub_confirmation=1