Database Transaction Isolation

Discussions center on using transactions, MVCC, snapshot isolation, and ACID properties (especially isolation) in databases like Postgres to manage concurrency and prevent race conditions.

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Sample Comments

EGreg Jan 11, 2013 View on HN

Basically, the correct way is to use transactions. Use a transactional database because it supports MVCC.

chacham15 May 11, 2018 View on HN

Im sorry, maybe im just inexperienced here, but doesnt what you're describing violate the isolation part of ACID? https://en.wikipedia.org/wiki/Isolation_(database_systems)

zeroimpl Sep 1, 2019 View on HN

Seems like if you tried to use transactions, you'd have the same problem?

nextaccountic Sep 5, 2021 View on HN

What's being discussed is MVCC, or multiversion concurrency controlhttps://en.wikipedia.org/wiki/Multiversion_concurrency_contr...

kpmah Sep 17, 2016 View on HN

Yes, be aware of the transactional capabilities of your database. Some ACID databases in their default configuration don't provide all transactional guarantees!

theoh May 2, 2019 View on HN

Sounds like https://en.wikipedia.org/wiki/Snapshot_isolation.

HillaryBriss Jun 17, 2019 View on HN

IDK, what about indexes? what about atomic transactions which add/update/delete rows to/from/from multiple tables?

paulryanrogers Sep 12, 2022 View on HN

Guessing you don't need atomic DB transactions in that case.

qaq Dec 12, 2023 View on HN

well Postgres does not need to do anything you can start a transaction and you have exactly that.

aargh_aargh Dec 6, 2019 View on HN

Doesn't your RDBMS support transactions?