How does concurrency control work in databases?
An example of an AI chatbot conversation about concurrency control in databases.
Can you explain how concurrency control works in databases?
Sure! Concurrency control is a mechanism that ensures that database transactions are executed in a safe manner, preventing conflicts.
What are the different types of concurrency control methods?
There are mainly two types: pessimistic concurrency control, which locks resources, and optimistic concurrency control, which allows transactions to proceed without locking.
How does locking work in pessimistic concurrency control?
In pessimistic concurrency control, when a transaction locks a resource, other transactions must wait until the lock is released before they can access that resource.
What are the drawbacks of using optimistic concurrency control?
The main drawback is that it can lead to higher chances of transaction conflicts, especially in high-contention environments, which may require rollbacks.
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