Can we do something more real world at least? what's the cost (hetzner monthly) of maintaining 1M concurrent websocket connection where each make a query to a p

Can we do something more real world at least? what's the cost (hetzner monthly) of maintaining 1M concurrent websocket connection where each make a query to a postgres db randomly every 1-4 seconds. The cost wouldn't be just Memory because the network card and CPU also enter the game.