Nikolay and Michael discuss over-indexing — what we mean by it, the regular issues people discuss about it, as well as a novel one Nikolay has come across and benchmarked recently. 
 
Here are some links to things they mentioned:

• Nikolay’s tweet on over-indexing https://twitter.com/samokhvalov/status/1713101666629927112 
• Heap-Only Tuples (HOT) optimization https://www.postgresql.org/docs/current/storage-hot.html 
• Our episode on index maintenance https://postgres.fm/episodes/index-maintenance 
• PgBouncer now supports prepared statements https://github.com/pgbouncer/pgbouncer/releases/tag/pgbouncer_1_21_0 
• Our episode on connection poolers https://postgres.fm/episodes/connection-poolers 
• Configurable FP_LOCK_SLOTS_PER_BACKEND (Hackers mailing list discussion) https://www.postgresql.org/message-id/flat/CAM527d-uDn5osa6QPKxHAC6srOfBH3M8iXUM%3DewqHV6n%3Dw1u8Q%40mail.gmail.com 
• LWLock:lock_manager (Amazon RDS docs) https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/wait-event.lw-lock-manager.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 brought to you by:

• Nikolay Samokhvalov, founder of Postgres.ai
• Michael Christofides, founder of pgMustard

With special thanks to:

• Jessie Draws for the amazing artwork