How does MVCC work in PostgreSQL?
An example of an AI chatbot conversation about how MVCC operates in PostgreSQL.
Can you explain how MVCC works in PostgreSQL?
Sure! MVCC stands for Multi-Version Concurrency Control. It allows multiple transactions to occur simultaneously without locking the database.
How does it handle data consistency during concurrent transactions?
MVCC maintains data consistency by providing each transaction with a snapshot of the database at a specific point in time, ensuring that they don't interfere with each other.
What happens when a transaction is committed?
When a transaction is committed, the changes made by that transaction become visible to other transactions, and the old versions of the data are marked for cleanup.
Are there any downsides to using MVCC?
Yes, while MVCC improves concurrency, it can lead to increased storage usage due to old versions of data being retained until they are cleaned up.
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