postgres internals - ghdrako/doc_snipets GitHub Wiki https://postgrespro.com/blog/pgsql/5969985 https://www.interdb.jp/pg/ https://www.postgresql.org/files/developer/tour.pdf (old) Docs https://www.postgresql.org/docs/current/internals.html https://www.postgresql.org/docs/current/wal-internals.html