pub static CHANNEL_TCP_KEEPALIVE_IDLE: Key<Duration>Expand description
Kernel TCP keepalive idle period: the gap from last activity
until the kernel sends its first probe on connections created
by hyperactor’s channel layer. On a healthy idle connection
this is also the probe cadence (each ACK resets the timer).
Total peer-death detection time is idle + probe_budget where
probe_budget = TCP_KEEPALIVE_INTERVAL * TCP_KEEPALIVE_RETRIES
(private constants in channel::net, currently 15s). Larger
values reduce keepalive ACK traffic at the cost of slower
peer-death detection.