What Is a Cold Cache?
A cold cache holds little or no useful data, typically right after a process starts, a deploy, or an eviction. Requests against it miss and fall through to the origin, so latency is high until enough entries are populated. Performance improves as the cache warms with use.
Why it matters
On Latchkey managed runners, a fresh runner starts with a cold dependency cache, so the first build downloads everything and runs slower. Warming or restoring the cache is what turns later runs fast.
Related guides
What Is a Warm Cache?A warm cache is already populated with frequently needed data, so most requests hit it and are served quickly…
What Is a Cache Miss?A cache miss occurs when requested data is not in the cache, forcing a slower fetch from the origin and usual…
What Is Cache Warming?Cache warming is the deliberate preloading of a cache with likely-needed data before traffic arrives, so earl…