What are the different locking strategies in databases?

What are the different locking strategies in databases?

There are several locking strategies in databases, including optimistic locking, pessimistic locking, and row-level locking. Would you like to know more about each?

Yes, can you explain optimistic and pessimistic locking?

Optimistic locking assumes that multiple transactions can complete without affecting each other. It checks for conflicts before committing. Pessimistic locking, on the other hand, locks resources as soon as they are acquired, preventing other transactions from accessing them until the lock is released.

What are the advantages and disadvantages of each?

Optimistic locking is more efficient in low-contention scenarios but can lead to rollbacks in high-contention situations. Pessimistic locking prevents conflicts but can lead to deadlocks and reduced concurrency.

Which strategy is generally preferred?

It depends on the application. Optimistic locking is preferred in environments with low contention, while pessimistic locking is better for high-contention scenarios.