Time-Series Cardinality: Why One More Indexed Column Costs More Than a Million More Rows

The Good Tech Companies · Sep 16, 2026 · 16m

This story was originally published on HackerNoon at: https://hackernoon.com/time-series-cardinality-why-one-more-indexed-column-costs-more-than-a-million-more-rows. Learn how high-cardinality time-series data affects PostgreSQL index size, query planning, and ingest performance, and how schema normalization can help. Check more stories related to undefined at: https://hackernoon.com/c/undefined. You can also check exclusive content about #postgresql-high-cardinality, #postgresql-index-width, #postgresql-extended-statistics, #postgres-time-series, #composite-index-performance…