ReferenceGlossary
Four golden signals
Latency, traffic, errors, and saturation: the four measures that the Google SRE book says to watch first on a user-facing system. If you can measure only four things, measure these.
Observability
In Quorum#
The Dashboard (D) opens after Metrics research. Its Golden signals row charts traffic (served against demand), latency (the mean, plus the p99 with Percentiles), and errors (with Structured logs). The Saturation row below shows how full each Node is, and the stats at the top name the Hottest Node.
Read next#
RED method, USE method, Utilization, Percentile (p50, p95, p99)