Vector Database Selection for a Production RAG System: pgvector vs Qdrant vs Weaviate

pgvector keeps your stack simple if you already use Postgres. Qdrant's HNSW index and filtered search performance outpace pgvector at scale. The crossover point we measured.

Overview

This note is part of the field-notes archive generated for this site. The summary below is the published excerpt; you can expand the full write-up anytime in the CMS.

Series

Part of ML in Production (installment 6).

Related notes

• Rag Vs Finetuning Decision Framework
• Embedding Model Selection Production Search

Tags

• vector-database
• rag
• pgvector
• qdrant
• machine-learning