Pathwise

Manuals / Observability Basics / Chapter 3

A · Pillars · beginner · ~35 min · Chapter 3 of 9

Metrics & dashboards

RED (Rate, Errors, Duration) and USE (Utilization, Saturation, Errors). Prefer percentiles. Know gold signals.

Path progress
33%

Step 1 of 1

Read a service dashboard

Read a service dashboardDrag stickies · tap for tips
Study mapDrag stickies · tap for tipsKeep it shortdrag · tap →Name the waitdrag · tap →Scope locatorsdrag · tap →Trace when stuckdrag · tap →One browser firstdrag · tap →Isolate statedrag · tap →Assert the UIdrag · tap →Retry wiselydrag · tap →Seed datadrag · tap →Close the loopdrag · tap →Keep it shortdrag · tap →Name the waitdrag · tap →Scope locatorsdrag · tap →Trace when stuckdrag · tap →One browser firstdrag · tap →Isolate statedrag · tap →Pathwise hackdrag · tap →Read a service dasdrag · tap →Try thisdrag · tap →Follow the dashed drag · tap →

Do this now

Screenshot or note: RPS, error rate, p95 latency during a quiet and a busy window.

Pro tip: A flat average with spiky p99 means someone is hurting.

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Chapter learning outcomes
  • RED/USE
  • Cardinality caution
  • Dashboard reading

Clear these before you leave