This object sets the per-service, per-metric weight for this specific server port, overriding the host-level weight for that metric when the value is nonzero, with 0 meaning the host-specific weight is used instead. This lets an admin fine-tune server selection differently for different services running on different ports of the same server, rather than applying one blanket weighting scheme across every service that server offers. An admin might give a latency metric extra weight specifically for a real-time chat service's port while leaving a file-download service on a different port of the same server with the host's default weighting.