Bloat

Postgres FM

Michael is joined by Chelsea Dole, Staff Software Engineer and Tech Lead of the Data Storage Team at Brex, to discuss bloat. They cover what it is, why it's a problem, strategies for minimising it, and the options when it's really bad.
Here are some links to things they mentioned:

• Managing your tuple graveyard (talk by Chelsea) https://www.youtube.com/watch?v=gAgbzvGT6ck
• pgstattuple https://www.postgresql.org/docs/current/pgstattuple.html
• pg_class https://www.postgresql.org/docs/current/catalog-pg-class.html
• Bloat in PostgreSQL: a taxonomy (talk by Peter Geoghegan) https://youtube.com/watch?v=JDG4bMHxCH8
• It's Not You, It's Me: Breaking Up with Massive Tables via Partitioning (talk by Chelsea) https://youtube.com/watch?v=TafwSuLNxe8
• pg_repack https://github.com/reorg/pg_repack
• pg_squeeze https://github.com/cybertec-postgresql/pg_squeeze
• VACUUM https://www.postgresql.org/docs/current/sql-vacuum.html
• autovacuum https://www.postgresql.org/docs/current/runtime-config-autovacuum.html
• CLUSTER https://www.postgresql.org/docs/current/sql-cluster.html
• HOT updates https://www.postgresql.org/docs/current/storage-hot.html
• Our episode on BUFFERS https://postgres.fm/episodes/buffers-by-default
• Our episode on TOAST https://postgres.fm/episodes/toast
• Our episode on index maintenance https://postgres.fm/episodes/index-maintenance
• Chelsea's website: https://chelseadole.com/

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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 special thanks to:

• Jessie Draws for the amazing artwork