Postgres FM
High availability
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Show notes
Nikolay and Michael discuss HA (high availability) — what it means, tools and techniques for maximising it, while going through some of the more common causes of downtime.
Here are some links to some things they mentioned:
- https://en.wikipedia.org/wiki/High_availability
- https://postgres.fm/episodes/upgrades
- https://github.com/shayonj/pg_easy_replicate/
- pg_easy_replicate discussion on Hacker News https://news.ycombinator.com/item?id=36405761
- https://postgres.fm/episodes/connection-poolers
- https://www.postgresql.org/docs/current/libpq.html
- Support load balancing in libpq (new feature in Postgres 16)
https://commitfest.postgresql.org/42/3679/ - target_session_attrs options for high availability and scaling (2021; a post by Laurenz Albe) https://www.cybertec-postgresql.com/en/new-target_session_attrs-settings-for-high-availability-and-scaling-in-postgresql-v14/
- Postgres 10 highlight - read-write and read-only mode of libpq (2016, a post by Michael Paquier) https://paquier.xyz/postgresql-2/postgres-10-libpq-read-write/
- Postgres 10 highlight - Quorum set of synchronous standbys (2017, a post by Michael Paquier) https://paquier.xyz/postgresql-2/postgres-10-quorum-sync/
- https://github.com/zalando/patroni
- https://postgres.fm/episodes/replication
- https://blog.rustprooflabs.com/2021/06/postgres-bigint-by-default
- Zero-downtime Postgres schema migrations need this: lock_timeout and retries (2021) https://postgres.ai/blog/20210923-zero-downtime-postgres-schema-migrations-lock-timeout-and-retries
- A fix in Patroni to mitigate a very long shutdown attempt when archive_command has a lot of WALs to archive https://github.com/zalando/patroni/pull/2067
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What did you like or not like? What should we discuss next time? Let us know via a YouTube comment, on social media, or by commenting on our Google doc!
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Postgres FM is brought to you by:
- Nikolay Samokhvalov, founder of Postgres.ai
- Michael Christofides, founder of pgMustard
With special thanks to:
- Jessie Draws for the elephant artwork