- Minimum TTL: Do not try to refresh before this timeout
- Regular TTL: Auto-refresh (if enabled) after this timeout; either through the background-updater or by enqueueing an update job on use
- Maximum TTL: Do not regularly deliver a cached record without prior update, but fall back to cached record on backend failure
- Critical TTL: Never deliver records older than this, even on backend failure
* Minimum TTL: Do not try to refresh before this timeout
* Regular TTL: Auto-refresh (if enabled) after this timeout; either through the background-updater or by enqueueing an update job on use
* Maximum TTL: Do not regularly deliver a cached record without prior update, but fall back to cached record on backend failure
* Critical TTL: Never deliver records older than this, even on backend failure