--- title: How to Handle Small Context Window Limits in RAG Systems description: When building RAG systems on constrained hardware with small context windows, basic chunk retrieval often fails silently — the right chunk is found but never... canonical: https://daily.dev/posts/how-to-handle-small-context-window-limits-in-rag-systems-wyr4c0z6q twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How to Handle Small Context Window Limits in RAG Systems | daily.dev og:description: When building RAG systems on constrained hardware with small context windows, basic chunk retrieval often fails silently — the right chunk is found but never... og:url: https://daily.dev/posts/how-to-handle-small-context-window-limits-in-rag-systems-wyr4c0z6q og:image: https://api.daily.dev/og/posts/wyr4c0z6Q.png og:image:alt: How to Handle Small Context Window Limits in RAG Systems 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 to Handle Small Context Window Limits in RAG Systems **[freeCodeCamp](https://daily.dev/sources/freecodecamp)** · 16 min read · 1 upvotes · 0 comments ## Summary When building RAG systems on constrained hardware with small context windows, basic chunk retrieval often fails silently — the right chunk is found but never reaches the model because the prompt budget fills up. A hierarchical pattern solves this: use document-level and chunk-level summaries for routing/retrieval, then switch to raw chunks for the final answer, all governed by an explicit token budget. The approach involves indexing chunk summaries, recursively reducing them into document summaries, and at query time searching summaries first before packing raw chunks into a fixed context budget. A debugging trace shows which chunks were included vs. skipped, distinguishing retrieval failures from context-budgeting failures. The pattern is simpler than LangChain's ParentDocumentRetriever or LlamaIndex's Document Summary Index, requires no vector database for the demo, and is especially useful for local models with limited VRAM. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Understanding Context and Contextual Retrieval in RAG](https://daily.dev/posts/understanding-context-and-contextual-retrieval-in-rag-jj01dhe3i) · Towards Data Science · 2 upvotes · 0 comments - [How Contextual Embeddings and Hybrid Search Fix Retrieval Failures](https://daily.dev/posts/how-contextual-embeddings-and-hybrid-search-fix-retrieval-failures-aqrcyuerf) · freeCodeCamp · 2 upvotes · 0 comments - [RAG Explained Simply with a Real Project](https://daily.dev/posts/rag-explained-simply-with-a-real-project-pgy15jzg7) · freeCodeCamp · 23 upvotes · 1 comments - [7 Chunking Strategies That Decide Whether Your RAG Works](https://daily.dev/posts/7-chunking-strategies-that-decide-whether-your-rag-works-hxdqk1cli) · Machine Learning Mastery · 2 upvotes · 0 comments --- Tags: [#python](https://daily.dev/tags/python), [#llm](https://daily.dev/tags/llm), [#typescript](https://daily.dev/tags/typescript), [#rag](https://daily.dev/tags/rag) [View this post on daily.dev](https://daily.dev/posts/how-to-handle-small-context-window-limits-in-rag-systems-wyr4c0z6q) ```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 to Handle Small Context Window Limits in RAG Systems","url":"https://daily.dev/posts/how-to-handle-small-context-window-limits-in-rag-systems-wyr4c0z6q","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-to-handle-small-context-window-limits-in-rag-systems-wyr4c0z6q"},"datePublished":"2026-06-18T06:19:21.888Z","dateModified":"2026-06-18T06:19:45.757Z","description":"When building RAG systems on constrained hardware with small context windows, basic chunk retrieval often fails silently — the right chunk is found but never...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/faf49d0d4c15ad7d19f48aa6699535ee?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/faf49d0d4c15ad7d19f48aa6699535ee?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"freeCodeCamp","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"freeCodeCamp","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1628412854/logos/freecodecamp","url":"https://daily.dev/sources/freecodecamp"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/how-to-handle-small-context-window-limits-in-rag-systems-wyr4c0z6q","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"python,llm,typescript,rag","timeRequired":"PT16M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"freeCodeCamp","item":"https://daily.dev/sources/freecodecamp"},{"@type":"ListItem","position":3,"name":"How to Handle Small Context Window Limits in RAG Systems"}]} ```