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AI-generatedproxy_cache_use_stale limits for upstream errors and expired content
Designing a caching layer with nginx proxy_cache requires clarity on when stale responses may be returned when the origin is unavailable. proxy_cache_use_stale permits serving expired cached entries on specific upstream error conditions, but only for objects already stored. The maximum age of usable stale data is bounded by proxy_cache_valid and optionally p
nginx