synchronous_commit

Nikolay and Michael discuss synchronous_commit — what it means on single node setups, for synchronous replication setups, and the pros and cons of the different options for each.

Here are some links to things they mentioned:
• synchronous_commit postgresql.org/docs/current/runtime-config-wal…
• synchronous_commit history on pgPedia pgpedia.info/s/synchronous_commit.html
• Patroni’s maximum_lag_on_failover setting patroni.readthedocs.io/en/master/replication_m…
• wal_writer_delay postgresql.org/docs/current/runtime-config-wal…
• Selective asynchronous commits in PostgreSQL - balancing durability and performance (blog post by Shayon Mukherjee) shayon.dev/post/2025/75/selective-asynchronous…
• Asynchronous Commit postgresql.org/docs/current/wal-async-commit.h…
• synchronous_standby_names postgresql.org/docs/current/runtime-config-rep…
• Jepson article about Amazon RDS multi-AZ clusters (by Kyle Kingsbury, aka "Aphyr”) jepsen.io/analyses/amazon-rds-for-postgresql-1…

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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, (postgres.fm/people) or by commenting on our Google doc (docs.google.com/document/d/1PNGSn_d0A7gTR4C0p6…)!

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Postgres FM is produced by:
• Michael Christofides, founder of pgMustard (pgmustard.com)
• Nikolay Samokhvalov, founder of Postgres.ai (postgres.ai)

With credit to:
• Jessie Draws for the elephant artwork