My server hangs when exploring. Boots clients.

[gw_epyon]

I'm hosting a server with 8 gb ram and a 3.2 ghz 6 core processor. Even when it's just me on the server, exploring new terrain, the minimap will stop loading and the server will kick all players and take a while to recover. I'm playing on the same pc that the server is hosted on and have a total of 16 gb ram. Some of my cores spike to 100% but I'm usually only at 40-50% total load when it hangs and boots my client. I've heard about removing better dungeons mods and such but I don't want to take fun mods away from hexxit. I'm an amateur server host so any help would be appreciated.

Edited February 9, 2014 by gw_epyon

[arriej]

Do you have a crash log or anything?

[gw_epyon]

Editing my topic to have better wording. Server doesn't actually crash. Nothing in the crash logs. It seems to be happening most often when generating large structures, such as dungeons and castles, while exploring.