--- title: "Understanding Queueing Theory" url: https://daily.dev/posts/understanding-queueing-theory-oruboujom source_url: https://www.bigbinary.com/blog/understanding-queueing-theory type: article source: "BigBinary" published: 2025-06-03T10:41:05.711Z updated: 2025-06-03T10:41:30.003Z tags: ["performance", "rails"] reading_time: 10 upvotes: 2 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Understanding Queueing Theory **[BigBinary](https://daily.dev/sources/bigbinary)** · 10 min read · 2 upvotes · 0 comments ## Summary Queueing theory provides mathematical foundations for understanding background job systems like Sidekiq and Solid Queue. Key concepts include Little's Law (L = λW), which relates system load to processing capacity, and the critical insight that utilization above 70-75% causes exponential latency increases. The article explains how to calculate optimal parallelism using Amdahl's Law, considering I/O wait times and thread concurrency. Practical guidance covers determining the right number of Sidekiq processes based on offered traffic, target utilization rates, and theoretical parallelism calculations. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 0 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments --- Tags: [#performance](https://daily.dev/tags/performance), [#rails](https://daily.dev/tags/rails) [View this post on daily.dev](https://daily.dev/posts/understanding-queueing-theory-oruboujom)