Understanding Locks and Deadlocks

When many users or applications access a database at the same time, it's called concurrency. PostgreSQL, like other databases, needs to manage these concurrent operations carefully.

Without proper management, multiple operations could try to modify the same data simultaneously, leading to inconsistencies or errors. This is where locks come in!

A database lock is a mechanism that controls access to data by multiple transactions. It ensures that data remains consistent and prevents conflicts.

• Data Integrity: Guarantees that data is accurate and reliable.
• Consistency: Ensures that transactions see a consistent view of the database.
• Conflict Prevention: Stops different operations from corrupting data by trying to write to the same place at the same time.