Function warnPerReplicaRateLimit

internal/server/server.go:888–905

warnPerReplicaRateLimit logs a startup advisory when any tenant has a non-zero rate_limit_rps. The in-memory rate limiter counts within a single process; each replica enforces its own window independently. In a multi-replica deployment the effective global limit is N × rate_limit_rps. To approximate

(cfg *config.Config)

// independently. In a multi-replica deployment the effective global limit is N × rate_limit_rps.
// To approximate a global cap, set rate_limit_rps = desired_global_rps / replica_count.
func warnPerReplicaRateLimit(cfg *config.Config) {
	var limited []string
	for _, t := range cfg.Tenants {
		if t.RateLimitRPS > 0 {
			limited = append(limited, t.ID)
		}
	}
	if len(limited) == 0 {
		return
	}
	log.Printf(
		"event=rate_limit_per_replica tenants=%v "+
			"note=\"rate_limit_rps is enforced per-replica (in-memory); "+
			"in a multi-replica deployment the effective global limit is N×rate_limit_rps. "+
			"To approximate a global cap, divide the desired RPS by your replica count.\"",
		limited,
	)
}