Oct 19, 2026Oct 19, 2026 · 9 min read · 1 viewThe Real Cost of a Single Insert in PostgresOriginally published on September 11, 2026. Written by John Shi. A 40-byte sensor reading does not cost 40 bytes to store. On a table with three indexes, Postgres writes four separate WAL records for 9 min read · 1 view
