https://postgrespro.ru/docs/postgresql/16/using-explain

-- Shift-F7 - Explain Analyze
-- file:///D:/dev/Utils/PostgreSQL/9.1/doc/postgresql/html/sql-explain.html
-- file:///D:/dev/Utils/PostgreSQL/9.1/doc/postgresql/html/sql-analyze.html
-- file:///D:/dev/Utils/PostgreSQL/9.1/doc/postgresql/html/auto-explain.html
-- explain analyze

explain (analyze, costs off, buffers)  -- buffers is aprox about num of disk ops