How do you investigate a latency spike that lasted only five minutes?

Core Summary

A latency spike that self-heals is usually a transient event: a brief resource spike (GC pause, momentary CPU burst), a traffic pattern (a batch job, a cache miss thundering herd), or a brief dependency issue. The challenge is that by the time you start investigating, it is gone. So you have to know what to capture in real time and look backward.