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A Postgres database cube beside a dedicated vector index lattice, illustrating the RAG vector store choice

Engineering · Jul 16, 2026 · 11 min read

pgvector or a dedicated vector database? A RAG decision guide for 1M to 100M vectors

Most pgvector-versus-vector-database comparisons quote one vendor benchmark from April 2025 that ran no filtered queries and tested an extension most teams do not install. Here is what the primary sources actually

Manu Shukla

#RAG #PostgreSQL #vector-search