On the Tekkit server currently when something lag's the server to hell it crashes and is then restarted and then crashes again etc. But we have to "hunt" for the case weather it be some bug or someone that had just finished building a Huge diamond machine that would lag the server out.
One of the way's to fix this problem is to start new with the rule of a limited amount of item's like quarry's per person. Or maybe would could go to the Tekkit community and ask for the server side of Tekkit to use more than 1 processeser or whatever.
Again these are just idea's to help the Tekkit server from lagging and enhancing the overall fun experience for the player's on the server.

- jackerdelta