It looks good but it's from 2023 (postgres 14). Does anyone have anything from after 2025?
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.
To your point, PG15 has a pretty meaningful change to its base backup protocol
https://github.com/wal-g/wal-g/issues/1385
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.