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Vector Database Selection on AWS - OpenSearch, Aurora pgvector, MemoryDB, and S3 Vectors with Index Algorithm Internals | hidekazu-konishi.com

hidekazu-konishi.com · published 13 July 2026

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https://docs.opensearch.org/latest/vector-search/vector-search-techniques/approximate-knn/

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https://aws.amazon.com/blogs/big-data/amazon-opensearch-services-vector-database-capabilities-explained/

aws.amazon.com

https://aws.amazon.com/blogs/big-data/cost-optimized-vector-database-introduction-to-amazon-opensearch-service-quantization-techniques/

aws.amazon.com

https://docs.aws.amazon.com/opensearch-service/latest/developerguide/serverless-vector-search.html

docs.aws.amazon.com

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraPostgreSQL.VectorDB.html

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https://aws.amazon.com/blogs/database/running-pgvector-in-production-on-amazon-aurora-postgresql/

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https://aws.amazon.com/blogs/database/load-vector-embeddings-up-to-67x-faster-with-pgvector-and-amazon-aurora/

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https://docs.aws.amazon.com/memorydb/latest/devguide/vector-search-overview.html

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https://aws.amazon.com/blogs/database/power-real-time-vector-search-capabilities-with-amazon-memorydb/

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https://docs.aws.amazon.com/AmazonS3/latest/userguide/s3-vectors-limitations.html

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https://aws.amazon.com/blogs/aws/amazon-s3-vectors-now-generally-available-with-increased-scale-and-performance/

aws.amazon.com

https://docs.aws.amazon.com/neptune-analytics/latest/userguide/vector-similarity.html

docs.aws.amazon.com

https://docs.aws.amazon.com/prescriptive-guidance/latest/choosing-an-aws-vector-database-for-rag-use-cases/vector-db-comparison.html

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https://docs.aws.amazon.com/bedrock/latest/APIReference/API_agent_StorageConfiguration.html

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https://aws.amazon.com/about-aws/whats-new/2026/06/amazon-bedrock-managed-knowledge-base/

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https://docs.aws.amazon.com/bedrock/latest/userguide/titan-embedding-models.html

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https://aws.amazon.com/blogs/database/the-role-of-vector-datastores-in-generative-ai-applications/

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