Extended Statistics

Nikolay and Michael discuss the CREATE STATISTICS feature in Postgres — what it's for, how often it's used, and how to spot cases where it would help.

Here are some links to things they mentioned:
• CREATE STATISTICS postgresql.org/docs/current/sql-createstatisti…
• citext postgresql.org/docs/current/citext.html
• Statistics Used by the Planner postgresql.org/docs/current/planner-stats.html
• default_statistics_target postgresql.org/docs/current/runtime-config-que…
• Tomáš Vondra on Postgres TV youtube.com/watch?v=8la-OWfD3VI
• Recent commit to Postgres 18 for pg_upgrade git.postgresql.org/gitweb/?p=postgresql.git;a=…
• Multivariate Statistics Examples postgresql.org/docs/current/multivariate-stati…
• Extended statistics (README) github.com/postgres/postgres/blob/master/src/b…
• How we used Postgres extended statistics to achieve a 3000x speedup (blog post by Jared Rulison) medium.com/affinity-engineering/how-we-used-po…

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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