HOT updates
Nikolay and Michael discuss Heap-Only Tuple (HOT) updates — what they are, the benefits, and things you can do to optimize for them.
Here are links to a few things we mentioned:
- Heap-only tuple updates (docs)
- README file (source code)
- Heap Only Tuple chapter (Internals of PostgreSQL by Hironobu SUZUKI)
- How partial, covering, and multicolumn indexes may slow down UPDATEs (blog post by Nikolay)
- Why Uber switched from Postgres to MySQL (blog post)
- Fighting write amplification with HOT updates (Adyen blog post)
- HOT Updates vs Bottom-Up Index Deletion (video by Lukas Fittl from pganalyze)
- Reduced Bloat with Bottom-Up Deletion (blog post by Hamid Akthar from Percona)
- What is fillfactor and how does it affect performance? (blog post by Kaarel Moppel from Cybertec)
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What did you like or not like? What should we discuss next time? Let us know by tweeting us on @samokhvalov / @michristofides / @PostgresFM, or by commenting on our Google doc.
If you would like to share this episode, here's a good link (and thank you!)
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
