This article critically examines PostgreSQL's Multi-Version Concurrency Control (MVCC) design, highlighting common criticisms like write amplification and table bloat while arguing these are deliberate trade-offs rather than defects. It compares PostgreSQL's approach to other database engines including Oracle, InnoDB, SQL Server, MongoDB, and LSM-based systems to contextualize the costs of MVCC across different architectures.
Background
MVCC is a fundamental concurrency control mechanism in modern databases that allows readers and writers to operate without blocking each other by maintaining multiple versions of data rows. The article explores how different database systems implement this concept with varying trade-offs in storage, performance, and maintenance overhead.
- Source
- Lobsters
- Published
- Jul 29, 2026 at 09:25 PM
- Score
- 7.0 / 10