--- title: How I’d Design SQS for 1,000 Customers | daily.dev description: A walkthrough of designing a fair multi-tenant job queue system using AWS SQS FIFO queues for an AI agent platform. Covers the noisy neighbor problem, how FIFO... canonical: https://daily.dev/posts/how-i-d-design-sqs-for-1-000-customers-zdbfexaqd twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How I’d Design SQS for 1,000 Customers | daily.dev og:description: A walkthrough of designing a fair multi-tenant job queue system using AWS SQS FIFO queues for an AI agent platform. Covers the noisy neighbor problem, how FIFO... og:url: https://daily.dev/posts/how-i-d-design-sqs-for-1-000-customers-zdbfexaqd og:image: https://api.daily.dev/og/posts/zdBFExaQD.png og:image:alt: How I’d Design SQS for 1,000 Customers og:image:width: 1200 og:image:height: 630 og:locale: 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. # How I’d Design SQS for 1,000 Customers **[Web Dev Cody](https://daily.dev/sources/webdevcody)** · 9 min read · 10 upvotes · 0 comments ## Summary A walkthrough of designing a fair multi-tenant job queue system using AWS SQS FIFO queues for an AI agent platform. Covers the noisy neighbor problem, how FIFO message group IDs shard work across users, setting maximum concurrency to match AWS microVM rate limits, and using shard IDs to implement a priority-like system where premium users get more concurrent capacity than basic plan users. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How can I prevent one tenant from monopolizing an AWS SQS queue in a multi-tenant system? Use a FIFO SQS queue with a message group ID per tenant so that message groups are processed as separate logical sub-queues, then set a maximum concurrency limit so only one message per group is in flight at a time. This stops a single user who enqueues many messages from blocking other users, since the consumer skips groups that already have an active in-flight message and pulls from idle groups instead. _Developers wrestling with noisy-neighbor problems in shared queues can find more real-world architecture write-ups on daily.dev._ ### Why does increasing SQS FIFO maximum concurrency not speed up my AWS Lambda-based workers? Maximum concurrency on a FIFO queue only controls how many message groups can be processed in parallel, but it is capped by underlying AWS account limits such as transactions-per-second for the service the workers call. A new AWS account may allow only one microVM launch per second, so setting concurrency to a thousand just causes repeated failed launch attempts and wasted compute until the account's rate and memory limits are raised. _Teams tuning concurrency against AWS account limits often compare notes on scaling patterns via daily.dev._ ### How can I give premium users higher priority in an AWS SQS FIFO queue without a separate priority queue? Attach multiple shard IDs to a single message group so a premium user's messages get distributed across several sub-queues instead of just one, giving them proportionally more concurrent processing slots. A basic-tier user with only one shard has all messages funneled through a single lane, so premium messages have a statistically higher chance of being picked up sooner, simulating priority without AWS's native priority queue feature. _Anyone designing tiered access for queued workloads can track more SQS sharding techniques on daily.dev._ ## Similar posts on daily.dev - [Amazon SQS turns 20: Two decades of reliable messaging at scale](https://daily.dev/posts/amazon-sqs-turns-20-two-decades-of-reliable-messaging-at-scale-eor4p7rmi) · AWS · 1 upvotes · 0 comments - [SFQ: Simple, Stateless, Stochastic Fairness](https://daily.dev/posts/sfq-simple-stateless-stochastic-fairness-x4eraradk) · Programming Digest · 0 upvotes · 0 comments - [Building a Distributed Persistent Queue That Scaled AI Workloads 5x](https://daily.dev/posts/building-a-distributed-persistent-queue-that-scaled-ai-workloads-5x-xz1mncqkf) · Salesforce Engineering · 2 upvotes · 0 comments - [Fair by design: orchestrating background jobs in Ruby—Martian Chronicles, Evil Martians’ team blog](https://daily.dev/posts/fair-by-design-orchestrating-background-jobs-in-ruby-martian-chronicles-evil-martians-team-blog-piyszlqky) · Martian Chronicles · 0 upvotes · 0 comments --- Tags: [#aws](https://daily.dev/tags/aws), [#ai-agents](https://daily.dev/tags/ai-agents), [#architecture](https://daily.dev/tags/architecture), [#distributed-systems](https://daily.dev/tags/distributed-systems), [#multi-tenancy](https://daily.dev/tags/multi-tenancy) [View this post on daily.dev](https://daily.dev/posts/how-i-d-design-sqs-for-1-000-customers-zdbfexaqd) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"How I’d Design SQS for 1,000 Customers","url":"https://daily.dev/posts/how-i-d-design-sqs-for-1-000-customers-zdbfexaqd","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-i-d-design-sqs-for-1-000-customers-zdbfexaqd"},"datePublished":"2026-07-14T14:25:47.188Z","dateModified":"2026-09-14T06:50:31.716Z","description":"A walkthrough of designing a fair multi-tenant job queue system using AWS SQS FIFO queues for an AI agent platform. 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