What are the best practices for MVCC in PostgreSQL?

What are the best practices for MVCC in PostgreSQL?

The best practices for MVCC in PostgreSQL include using appropriate transaction isolation levels, managing long-running transactions, and regularly vacuuming your database to reclaim storage.

Can you explain why vacuuming is important?

Vacuuming is crucial because it helps to remove dead tuples, which can accumulate due to updates and deletes, thus preventing bloat and ensuring efficient space usage.

What isolation levels should I consider?

You should consider using 'Read Committed' for most cases, but 'Serializable' can be beneficial for critical transactions that require strict consistency.

How can I monitor long-running transactions?

You can monitor long-running transactions by querying the pg_stat_activity view, which provides information about active queries and their durations.