Postgres FM

Nik and Michael are joined by Sai Srirampur to discuss ClickHouse's new managed Postgres service.
 
Here are some links to things they mentioned: 
Sai Srirampur https://postgres.fm/people/sai-srirampur
ClickHouse Managed Postgres https://clickhouse.com/cloud/postgres
ClickPipes https://clickhouse.com/cloud/clickpipes
walshadow https://github.com/ClickHouse/walshadow
pg_clickhouse https://github.com/clickHouse/pg_clickhouse
ClickHouse PostgreSQL powered by Ubicloud https://www.ubicloud.com/blog/clickhouse-postgresql-powered-by-ubicloud
Hacking Postgres logical decoding sessions https://hacking.postgres.tv/topics/logical-decoding/ 
wal-rus https://github.com/ClickHouse/wal-rus
pg_createsubscriber https://www.postgresql.org/docs/current/app-pgcreatesubscriber.html

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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 produced by:
Michael Christofides, founder of pgMustard
Nikolay Samokhvalov, founder of Postgres.ai

With credit to:
Jessie Draws for the elephant artwork

Nik and Michael discuss hot_standby_feedback — what it controls, whether and when read replicas should be changed to on, and other settings you can change to help too.
 
Here are some links to things they mentioned: 
hot_standby_feedback https://www.postgresql.org/docs/current/runtime-config-replication.html#GUC-HOT-STANDBY-FEEDBACK
hot_standby_feedback: experiments on PostgreSQL 17 (by Nik) https://console.postgres.ai/shared/brief/6018f69d-8975-48e3-8259-a72c77105572
Best practices for Amazon RDS PostgreSQL replication (blog post) https://aws.amazon.com/blogs/database/best-practices-for-amazon-rds-postgresql-replication/
log_autovacuum_min_duration https://www.postgresql.org/docs/current/runtime-config-logging.html#GUC-LOG-AUTOVACUUM-MIN-DURATION
max_standby_streaming_delay https://www.postgresql.org/docs/current/runtime-config-replication.html#GUC-MAX-STANDBY-STREAMING-DELAY
WAIT FOR LSN https://www.postgresql.org/docs/19/sql-wait-for.html
transaction_timeout https://www.postgresql.org/docs/current/runtime-config-client.html#GUC-TRANSACTION-TIMEOUT
Hot Standby Feedback should default to on in 9.3+ https://www.postgresql.org/message-id/flat/20121130190227.GJ3957%40awork2.anarazel.de

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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!

~~~
Postgres FM is produced by:
Michael Christofides, founder of pgMustard
Nikolay Samokhvalov, founder of Postgres.ai

With credit to:
Jessie Draws for the elephant artwork

Nik and Michael are joined by Shaun Thomas to discuss estimating work_mem, memory management in general, and writing an extension to help.
 
Here are some links to things they mentioned: 
Shaun Thomas https://postgres.fm/people/shaun-thomas
work_mem https://www.postgresql.org/docs/current/runtime-config-resource.html#GUC-WORK-MEM
pg_stat_database https://www.postgresql.org/docs/current/monitoring-stats.html#MONITORING-PG-STAT-DATABASE-VIEW
ALTER ROLE SET configuration_parameter https://www.postgresql.org/docs/current/sql-alterrole.html#SQL-ALTERROLE-PARAMS-CONFIGURATION-PARAMETER
hash_mem_multiplier https://www.postgresql.org/docs/current/runtime-config-resource.html#GUC-HASH-MEM-MULTIPLIER
Recent Postgres releases with 28 CVEs fixed https://www.postgresql.org/about/news/postgresql-186-1711-1615-1519-1424-and-19-beta-3-released-3365/
Systemic Risks in the Managed PostgreSQL Industry (part 1 of 6, Mehmet Ince) https://mehmetince.net/part-1-6-systemic-risks-in-the-managed-postgresql-industry-extension-risks-are-real-exploiting-postgis-memory-corruption-bug-at-neondb-supabase-and-many-more/
Improving Postgres Connection Scalability: Snapshots (blog post by Andres Freund) https://techcommunity.microsoft.com/blog/adforpostgresql/improving-postgres-connection-scalability-snapshots/1806462

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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!

~~~
Postgres FM is produced by:
Michael Christofides, founder of pgMustard
Nikolay Samokhvalov, founder of Postgres.ai

With credit to:
Jessie Draws for the elephant artwork

Nik and Michael are joined by Michael Malis, co-creator of pgrust, to discuss their Postgres rewrite, including reliability problems, compatibility testing, faster analytics, and a new JIT-compiled query engine.
 
Here are some links to things they mentioned: 
Michael Malis https://postgres.fm/people/michael-malis
pgrust https://github.com/malisper/pgrust 
The four horsemen behind Postgres outages (blog post by Michael Malis) https://malisper.me/the-four-horsemen-behind-thousands-of-postgres-outages
Rebuilding Postgres for faster analytics: batching, operator fusion, and SIMD (blog post by Michael Malis) https://malisper.me/how-we-made-postgres-hundreds-of-times-faster-the-query-engine/
kani https://github.com/model-checking/kani
Antithesis https://antithesis.com
fsyncgate mailing list thread https://www.postgresql.org/message-id/flat/CAMsr%2BYHh%2B5Oq4xziwwoEfhoTZgr07vdGG%2Bhu%3D1adXx59aTeaoQ%40mail.gmail.com
How AI Changes the Economics of JIT Compilers (blog post by Michael Malis) https://malisper.me/how-ai-changes-the-economics-of-jit-compilers/
Umbra DB https://umbra-db.com

~~~
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!

~~~
Postgres FM is produced by:
Michael Christofides, founder of pgMustard
Nikolay Samokhvalov, founder of Postgres.ai

With credit to:
Jessie Draws for the elephant artwork

Nik and Michael are joined by Radim Marek to discuss MVCC, including his recent article on how Postgres chose to implement it compared to other systems.
 
Here are some links to things they mentioned: 
Radim Marek https://postgres.fm/people/radim-marek
BoringSQL https://boringsql.com
PostgreSQL's MVCC is bad. So is everyone else's (blog post by Radim) https://boringsql.com/posts/mvcc-bad-bad/
PostgreSQL MVCC documentation https://www.postgresql.org/docs/current/mvcc-intro.html
PostgreSQL Storage Internals series by Radim https://boringsql.com/guides/postgresql-storage-internals/
PgQue https://github.com/NikolayS/pgque
The next ten years of Postgres (talk slides by Álvaro Herrera) https://www.postgresql.eu/events/pgconfde2026/sessions/session/7744/slides/866/edb-keynote-pgconfde-2026.pdf
Episode on RegreSQL https://postgres.fm/episodes/regresql
DryRun MCP https://github.com/boringsql/dryrun

~~~
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!

~~~
Postgres FM is produced by:
Michael Christofides, founder of pgMustard
Nikolay Samokhvalov, founder of Postgres.ai

With credit to:
Jessie Draws for the elephant artwork