Data Elixir on Mythryl: “Indexes speed up reads but slow writes. The real insight: indexes…”

Indexes speed up reads but slow writes. The real insight: indexes only help when you're returning <15-20% of rows. Beyond that, sequential scans win. Space and memory costs matter too. btree indexes often exceed table size.

dlt.github.ioIntroduction to PostgreSQL IndexesWho’s this for Basics How data is stored in disk How indexes speedup access to data Costs associated with indexes Disk Space Write operations Query planner Memory usage Types of Indexes Btree Hash…

5/2/26, 2:03 pm0 reposts1 like