pub const DEFAULT_PRESENT_TTL: Duration;Expand description
How long a record this reader read is reused, absent configuration.
Reasonable range: 60 to 3600 seconds. Nothing tells this deployment that a stranger changed a record — it consumes no firehose — so this TTL is the propagation delay, and it is stated rather than discovered. Fifteen minutes is short enough that a person who opens their replies sees it take effect while they are still at the keyboard.