NIX Server Load Limit - What is a good setting
 

My forum is really taking off now and I am getting complaints that the Server Busy message is coming up quite a bit. I had it set to the default of 5 and then switched it to 0 to turn it off.

Switching it to 0 crashed the server after a few hours and I had to spend 6 hours rebuilding my post_index table which is over 400 MB. And boy I never want to have to do that again!!

So my question is what is a good Nix Server Load Limit?

Does putting in a lower number in allow more users on site or does putting a higher number do that?