I'm sorry to be difficult, but my late step-father would respond to questions like this with "how long is a piece of string?" There is no useful direct answer

I'm sorry to be difficult, but my late step-father would respond to questions like this with "how long is a piece of string?" There is no useful direct answer to a question like this. Having said that, what are your normal communication latencies between nodes, P50-95-99? what are those numbers when the system is under heavy load? You can model the impact that different retry intervals will have on your system