PostgreSQL snapshots

• Henny Staas
• 2025-12-192025-12-20

What are snapshots in PostgreSQL, how do they work, and why you might need them. Snapshots are a key part of achieving Isolation in ACID. Let’s break it down quickly. ACID recap:Atomicity → All or nothing (transaction commits fully or rolls back).Consistency → Database moves from one valid state to another (constraints, triggers, etc.).Isolation →…