I had a thought, the difficulty setting in the password.

If you wrote a short scale for where to set it to, if you say server load drops with the preset (or am 100% wrong?)

Then maybe make some guide lines.

Eg. Below 500mh/s = d=xx
500 to 1500mh/s = d=xxx

Am i making sense?

I know myself, and many others have no idea what difficulty to set, and just go for the auto. (Am running 512 per your request)