Kacam.net

Observe the world

Troubleshooting: this set runs backwards

Every other set asks you questions. In this one **you ask and it answers**. It hands you an incident scene, holds a truth you can't see, and answers only what you ask — the drill isn't whether you know the cause, it's whether you know what to ask.

These prompts only exist in 简体中文 for now.

How to use this

It gives you the scene (what the service is, the symptom, when it started, the blast radius) and then goes quiet. You ask questions, request metrics, logs, packet captures, propose hypotheses — it answers from a truth you cannot see.

**It is not allowed to volunteer where to look next.** If you don't ask, it doesn't say — even if you circle for ten minutes. That's deliberate: in real life nobody stands next to you saying "maybe check the flame graph". Troubleshooting *is* the skill of knowing what to ask.

How to start

  1. Pick one, open it, copy the prompt.
  2. Paste it into a brand-new conversation.
  3. It gives you the scene and stops — **now it's your turn to speak.**

Four commands you can call out at any time

  • 给个方向 give me a direction, not the answer (counted in the tally)
  • 公布真相 reveal the truth and wrap up
  • 换一个 start over with a different incident
  • 复盘 wrap up now and print the review card

Three traps

  • Don't read the truth at the end first — that ruins the whole thing.
  • Don't start by guessing the cause. Establish the scope first (how much, which part, when it started); scope tells you whether this is a code problem or an environment problem.
  • Every scene has planted false leads: an unrelated deploy at the same time, metrics that are effects rather than causes, the textbook suspect waiting for you. The wrap-up tells you how many questions you spent on each.

Start with the P99 one — its diagnostic chain is the cleanest. Then "only some machines", whose lesson is the most reusable of all. Save the intermittent timeout for later: its answer lives outside your own system. The report mismatch needs no systems knowledge at all.

Resources maxed out

内存一周涨满一次,重启就好
内存一周涨满一次,靠每周三凌晨重启扛着,已经两个月了。
★★★★☆ · about 35 min
CPU 打满,QPS 一点没涨
CPU 从 40% 打到 95%,QPS 一点没涨,而且昨天没有发布。
★★★★☆ · about 30 min
These prompts are open source They live in the public kacam-net/hero-prompts repo. If one of them doesn't press hard enough, or its answer key is missing a line, go and change it — whether it ships here is a separate call, made by the catalogue on this side.