フリー問題

問題文

A graph of rate(http_requests_total[1m]) shows long empty stretches. The scrape interval for that job is 60 seconds. What is the most likely cause, and what is the fix?

選択肢

1. The window is too short for two samples, so the rate cannot be computed. Widening it to several scrape intervals fixes it.
2. The metric is a gauge value, so the rate function silently returns nothing. Switching to the average over time fixes the gaps.
3. The counter is resetting on every new scrape, which makes the rate correction discard the result. Restarting the target fixes it.
4. The lookback period is shorter than the window, so the selector finds nothing. Raising the lookback period to one hour fixes it.