What are the risks of long-running transactions and how do you mitigate them?

Problem Statement

Explanation

They hold locks and versions for a long time, increasing contention and bloat. In MVCC, old versions cannot be reclaimed, which inflates storage and slows scans. Checkpoint and log retention also grow. Mitigate by committing in smaller units, breaking work into batches, and using snapshot reads for reporting. Keep interactive transactions short and avoid idle-in-transaction sessions.

Code Solution

SolutionRead Only

-- Batch pattern
DELETE FROM events WHERE created_at < :cutoff LIMIT 10000; COMMIT; -- loop

Practice Sets

This question appears in the following practice sets:

Transactions, Concurrency & Isolation

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What are the risks of long-running transactions and how do you mitigate them?

Problem Statement

Explanation

Code Solution

Practice Sets

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Master Interviews Anywhere, Anytime

What are the risks of long-running transactions and how do you mitigate them?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which SQL statement retrieves all columns and rows from a table named employees?

Which clause filters rows before aggregation and affects which rows are grouped?

What is the default sort order when ORDER BY is used without ASC or DESC?

Which construct is commonly used to paginate results in SQL engines like Postgres and MySQL?

Which predicate correctly checks for missing values in standard SQL?

More from SQL & Databases

Master Interviews
Anywhere, Anytime