Drill

The average says fine

Users say the app turns sluggish every few seconds, yet the dashboard average looks healthy. Pick the number to alert on.

2 minEasy

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Users
Web API

From step 1 — Scaled down — short bursts every 10 seconds push latency from ~7 ms to ~12.5 ms (real slowdowns are bigger), and the average barely moves.

What you'll be able to do

1Choose percentiles over averages for targets and alerts, and explain why.

Inside the lesson

steps: 2
question: 1
simulation: 1

You guess first, then run the system and see if you were right.

Step 1 · The setup

Pixel's average latency sits at about 7 ms all day. Support keeps forwarding complaints: "the app gets sluggish every 10 seconds or so".

Step 2 is for members