How to Quantify Scalability - perfdynamics.com ![rw-book-cover|200x400](https://readwise-assets.s3.amazonaws.com/static/images/article3.5c705a01b476.png) ## Metadata - Author: **perfdynamics.com** - Full Title: How to Quantify Scalability - Category: #articles - URL: http://www.perfdynamics.com/Manifesto/USLscalability.html ## Highlights - The purpose of models is not to fit the data but to sharpen the questions. ([View Highlight](https://read.readwise.io/read/01j682vavhfj2r5c9mkn6kd4fv)) - **CONTENTION** (with proportionality α) due to waiting or **queueing** for shared resources ([View Highlight](https://read.readwise.io/read/01j683060wez2tvnwtrvm98464)) - **COHERENCY** or data consistency (with proportionality β) due to the delay for data to become consistent, or cache coherent, by virtue of **point-to-point exchange** of data between resources that are **distributed** ([View Highlight](https://read.readwise.io/read/01j6831cs697p6zzzdnf0rxz0h))