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PostgreSQL Internals [pdf] (2023)

(edu.postgrespro.com)

It looks good but it's from 2023 (postgres 14). Does anyone have anything from after 2025?
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I think this is the most up to date.

https://www.interdb.jp/pg/

Different author but also very interesting.

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They keep publishing Russian version of this book, with the latest covering PostgreSQL 18: https://edu.postgrespro.ru/postgresql_internals-18.pdf

AI should do a decent job translating it to English.

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On an unrelated note, this reminds me of the excellent books published by Mir Publications. Russian books in general are of very high quality.
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To your point, PG15 has a pretty meaningful change to its base backup protocol

https://github.com/wal-g/wal-g/issues/1385

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Awesome.
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