PostgreSQL storage internals

Headers and index page splits stretch a 20-byte Postgres sensor row to 95.6 bytes

Timescale measured a 20-byte sensor reading at 95.6 bytes per row on Postgres 16 once tuple headers and one index are counted. Over two years at 10,000 tags, that turns a 12 TB plan into 60 TB, and a loaded pilot table can show the gap before the schema review.