DField SolutionsMérnöki stúdió · Budapest
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TTL (cache time-to-live)

Related service Websites, web apps & online shops

DEFINITION

How long a cache entry stays fresh. Too short: backend burns. Too long: users see stale data. Pitfalls: cache stampede (a thousand clients race for a refresh on expiry · guard with single-flight or stale-while-revalidate), clock skew across nodes, and synchronised expiries that all fire at once. Never rely on a fixed TTL alone for security-sensitive caches · use explicit invalidation, not a timer.

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