Introduction

Mon, 01 Jan 0001 00:00:00 +0000

pg_exporter turns PostgreSQL and pgBouncer runtime state into Prometheus metrics. Unlike an exporter with a fixed list of hard-coded queries, most of its metric surface is declared in YAML: a collector defines SQL, result columns, labels, metric types, eligibility rules, timeouts, and caching policy.

That design gives operators two useful properties at once:

a release ships with a broad, tested default metric set;
local teams can add, remove, or specialize metrics without rebuilding the binary.

The Data Path

A normal scrape passes through six stages:

Concept on PG Exporter

Introduction

The Data Path