Nik and Michael discuss the various changes to EXPLAIN that arrived in Postgres 18.
Here are some links to things they mentioned:
- EXPLAIN (official docs) https://www.postgresql.org/docs/current/sql-explain.html
- Using EXPLAIN (official docs) https://www.postgresql.org/docs/current/using-explain.html
- EXPLAIN glossary (pgMustard site) https://www.pgmustard.com/docs/explain
- Postgres 18 release notes https://www.postgresql.org/docs/release/18.0/
- Enable BUFFERS with EXPLAIN ANALYZE by default (commit) https://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=c2a4078eb
- Our (first) BUFFERS by default episode https://postgres.fm/episodes/buffers-by-default
- Show index search count in EXPLAIN ANALYZE (commit) https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=0fbceae841cb5a31b13d3f284ac8fdd19822eceb
- Our episode on Skip scan with Peter Geoghegan https://postgres.fm/episodes/skip-scan
- What do the new Index Searches lines in EXPLAIN mean? https://www.pgmustard.com/blog/what-do-index-searches-in-explain-mean
- pg_stat_plans presentation by Lukas Fittl https://www.youtube.com/watch?v=26coQV3f-wk
- Improve EXPLAIN's display of window functions (commit) https://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=8b1b34254
- Show Parallel Bitmap Heap Scan worker stats in EXPLAIN ANALYZE (commit) https://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=5a1e6df3b
- Add information about WAL buffers being full (commit) https://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=320545bfc
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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