fn stats_ticker(
engine: Arc<Engine>,
interval_secs: u64,
shutdown: CancellationToken,
) -> Option<JoinHandle<()>>Expand description
Installs the process-wide tracing subscriber.
Honors RUST_LOG when set; otherwise filters at info, which is the
level the usage text documents.
Logs Engine counters on interval_secs. 0 starts nothing.