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Subtransactions
Nov. 24, 2023, 2 p.m. | Nikolay Samokhvalov and Michael Christofides
Postgres FM postgres.fm
Nikolay and Michael discuss PostgreSQL subtransactions — what they are, and four issues they can cause at scale.
Here are some links to things they mentioned:
- Subtransactions (docs) https://www.postgresql.org/docs/current/subxacts.html
- SAVEPOINT (docs) https://www.postgresql.org/docs/current/sql-savepoint.html
- PostgreSQL Subtransactions Considered Harmful (blog post by Nikolay) https://postgres.ai/blog/20210831-postgresql-subtransactions-considered-harmful
- Subtransactions and performance in PostgreSQL (blog post by Laurenz at Cybertec) https://www.cybertec-postgresql.com/en/subtransactions-and-performance-in-postgresql/
- Notes on some PostgreSQL implementation details (blog post by Nelson Elhage) https://buttondown.email/nelhage/archive/notes-on-some-postgresql-implementation-details/
- Why we spent the last month eliminating PostgreSQL subtransactions (GitLab blog post) https://about.gitlab.com/blog/2021/09/29/why-we-spent-the-last-month-eliminating-postgresql-subtransactions/
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