Jepsen: Amazon RDS for PostgreSQL 17.4
(jepsen.io)
Amazon RDS for PostgreSQL is an Amazon Web Services (AWS) service which provides managed instances of the PostgreSQL database. We show that Amazon RDS for PostgreSQL multi-AZ clusters violate Snapshot Isolation, the strongest consistency model supported across all endpoints. Healthy clusters occasionally allow Long Fork and other G-nonadjacent cycles. These phenomena occurred in every version tested, from 13.15 to 17.4. Amazon RDS for PostgreSQL may instead provide Parallel Snapshot Isolation.
Amazon RDS for PostgreSQL is an Amazon Web Services (AWS) service which provides managed instances of the PostgreSQL database. We show that Amazon RDS for PostgreSQL multi-AZ clusters violate Snapshot Isolation, the strongest consistency model supported across all endpoints. Healthy clusters occasionally allow Long Fork and other G-nonadjacent cycles. These phenomena occurred in every version tested, from 13.15 to 17.4. Amazon RDS for PostgreSQL may instead provide Parallel Snapshot Isolation.