What is lock hierarchy in database management?

What is lock hierarchy in database management?

Lock hierarchy refers to the structured way in which locks are acquired in a database to prevent deadlocks and ensure data integrity.

Can you explain why it's important to have a lock hierarchy?

It's important because it helps manage concurrent access to data, reducing the chances of deadlocks and ensuring that transactions are executed in a consistent manner.

What are some common types of locks used in this hierarchy?

Common types of locks include shared locks, exclusive locks, and intent locks, each serving different purposes in transaction management.

How does lock escalation fit into this hierarchy?

Lock escalation is the process of converting many fine-grained locks into fewer coarse-grained locks to reduce overhead and improve performance.

Can you give an example of a deadlock situation?

Sure! A deadlock occurs when two transactions hold locks that the other needs to proceed, causing both to wait indefinitely.