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Selecting a vector store for Amazon Bedrock Knowledge Bases

calendar_today September 17, 2026 person Deepak Dalakoti domain amazon-lex

Choosing the right vector store for your Amazon Bedrock Knowledge Bases RAG application affects performance and cost. This post compares Amazon OpenSearch Service, Amazon Aurora PostgreSQL with pgvector, and Amazon S3 Vectors across three RAG use cases, with benchmarks and a practical selection framework.

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