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Stack Sizer

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Load and options

LibreChat

v1.0.0
Load

Up to 50 users, up to 500 stored messages a day (prompts + replies), up to 0.5 GB of documents uploaded for file search; one year of history.

Options

No options change this app's resources.

Recommended resources

App requirements + system baseline + safety headroom. Nothing else is added, and nothing is rounded to a machine size.

vCPU 5.52, RAM 9 GiB, Disk 34.422 GiB

vCPU5.52
RAM9GiB
Disk34.422GiB
Breakdown
LineFromvCPURAM (GiB)Disk (GiB)Sources
LibreChatLibreChat (API and web client) · Medium load1.524.49912345
LibreChatMongoDB · Medium load0.511.863675
LibreChatMeilisearch · Medium load0.50.756.52289105
LibreChatPostgreSQL with pgvector · Medium load116.5111213141516171819202122
LibreChatrag_api (lite) · Medium load11.52.048232120245
System baselineOperating system, Container runtime (Docker Engine, containerd), System logs (journald), plus logs for 5 containers0.11.258.5252627282930
Safety headroomvCPU 20%, RAM 20%, disk 15% of apps + baseline0.921.54.493126322933
Recommended total5.52934.422
Sources
  1. LibreChat docs: deployment overview, minimum requirements 1 GiB RAM and 1 vCPU, 2 GB RAM suggested with everything enabled (LibreChat, read 14 Oct 2026)
  2. LibreChat v0.8.8 Dockerfile: node:24.16.0-alpine, USER node, creates /app/client/public/images, /app/logs, /app/uploads, /app/data, EXPOSE 3080, CMD npm run backend (LibreChat, read 14 Oct 2026)
  3. GHCR librechat-ai/librechat:v0.8.8 (linux/amd64): 988,662,027 B compressed, 2,804,835,840 B decompressed and counted; config User node, no Healthcheck; layers contain usr/bin/wget (LibreChat, read 14 Oct 2026)
  4. LibreChat v0.8.8 data-schemas winston config: log files on by default, daily rotation, maxSize 20m, maxFiles 14d (LibreChat, read 14 Oct 2026)
  5. Docker: containerd image store is the default on fresh Engine 29+ installs and keeps images compressed and uncompressed (LibreChat, read 10 Oct 2026)
  6. MongoDB manual: WiredTiger cache defaults to the larger of 50% of (RAM - 1 GB) or 256 MB; set --wiredTigerCacheSizeGB when the container cannot use all host RAM (LibreChat, read 14 Oct 2026)
  7. Docker Hub tag mongo:8.0.20 (linux/amd64): 312,915,385 B compressed; layers decompressed and counted: 957,032,960 B (LibreChat, read 14 Oct 2026)
  8. Meilisearch: Storage (LMDB never returns freed space; 9.1 MB JSON gave 224 MB on disk and ~305 MB RAM; RAM-to-disk 1/3, often 1/10, works well) (LibreChat, read 14 Oct 2026)
  9. Docker Hub tag getmeili/meilisearch:v1.35.1 (linux/amd64): 105,981,256 B compressed; layers decompressed and counted: 157,731,328 B (LibreChat, read 14 Oct 2026)
  10. LibreChat docs: Meilisearch (SEARCH=true plus a master key of 16+ bytes shared with the meilisearch service; keep port 7700 internal; reset-meili-sync) (LibreChat, read 14 Oct 2026)
  11. PostgreSQL 18 documentation: 19.4 Resource Consumption (LibreChat, read 10 Oct 2026)
  12. PostgreSQL 18 documentation: 19.3 Connections and Authentication (LibreChat, read 10 Oct 2026)
  13. PostgreSQL 18 documentation: 19.10 Vacuuming (autovacuum settings) (LibreChat, read 10 Oct 2026)
  14. PostgreSQL 18 documentation: 19.5 Write Ahead Log (max_wal_size) (LibreChat, read 10 Oct 2026)
  15. PostgreSQL 18 documentation: 51.2 How Connections Are Established (LibreChat, read 10 Oct 2026)
  16. Docker Official Image postgres: documentation (docker-library/docs) (LibreChat, read 10 Oct 2026)
  17. Docker Hub: library/postgres tag 18.6 (compressed image sizes) (LibreChat, read 10 Oct 2026)
  18. Docker Hub tag pgvector/pgvector:0.8.0-pg15-trixie (linux/amd64): 159,295,182 B compressed (152 MiB); layers decompressed and counted: 455,663,616 B (LibreChat, read 14 Oct 2026)
  19. pgvector v0.8.0 README: each vector takes 4 × dimensions + 8 bytes (LibreChat, read 14 Oct 2026)
  20. OpenAI embeddings guide: text-embedding-3-small returns 1536-dimensional vectors (LibreChat, read 14 Oct 2026)
  21. rag_api v0.9.0 app/config.py: RAG_PORT 8000, DB_HOST/DB_PORT/POSTGRES_* settings, RAG_OPENAI_API_KEY falls back to OPENAI_API_KEY, text-embedding-3-small, CHUNK_SIZE 1500, CHUNK_OVERLAP 100 (LibreChat, read 14 Oct 2026)
  22. LibreChat v0.8.8 docker-compose.yml: api on 3080 (librechat-data at /app/data), mongo:8.0.20 --noauth, meilisearch v1.35.1, pgvector 0.8.0-pg15-trixie, rag_api lite, admin-panel (LibreChat, read 14 Oct 2026)
  23. rag_api v0.9.0 README: EMBEDDING_BATCH_SIZE 500, EMBEDDING_MAX_QUEUE_SIZE 3, PARALLEL_EXECUTION 2 per upload; memory ≈ batch × (queue + parallel); smaller batches below 2 GB RAM (LibreChat, read 14 Oct 2026)
  24. GHCR manifest of librechat-ai/librechat-rag-api-dev-lite:v0.9.0 (linux/amd64): 539,995,713 B compressed; layers decompressed and counted: 1,659,485,184 B (LibreChat, read 14 Oct 2026)
  25. Ubuntu Server: System requirements (Sizing policy, read 10 Oct 2026)
  26. Google Kubernetes Engine: About GKE node sizing (Sizing policy, read 10 Oct 2026)
  27. ANAROQ measurement: dockerd and containerd at rest (Ubuntu 24.04, Docker 29.8.2) (Sizing policy, read 10 Oct 2026)
  28. Docker Community Forums: Docker resource usage & overhead (Sizing policy, read 10 Oct 2026)
  29. journald.conf(5), Ubuntu Manpages (Sizing policy, read 10 Oct 2026)
  30. Docker Docs: Local file logging driver (Sizing policy, read 10 Oct 2026)
  31. AWS Compute Optimizer: Rightsizing recommendation preferences (Sizing policy, read 10 Oct 2026)
  32. Kubernetes: Node-pressure Eviction (Sizing policy, read 10 Oct 2026)
  33. mke2fs(8), Ubuntu Manpages (Sizing policy, read 10 Oct 2026)
Basis
Catalog release
2026.10.10
Sizing policy
2026.10.0
Profile LibreChat
1.0.0

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