PostgreSQL
Turning PostgreSQL CSV Logs into Durable Metrics
The product boundary, durable-state protocol, bounded metric contract, and failure semantics for PostgreSQL CSV log metrics in PG Exporter
The PostgreSQL Observability Product We Chose Not to Build
Why a local-first PostgreSQL incident workbench was explored, then replaced by a much smaller CSV-log metrics feature inside PG Exporter
Snapshot Histograms Are Gauges, Not Counters
Why PG Exporter rebuilds SQL distributions on every query and exposes their buckets, count, and sum as gauge series