Chunk Loading Issues

[Stilleraben]

okay so am am running into this issue where players go overboard with mystcraft and the server is constantly trying to keep 50 dimensions open at once. is there any way to reduce this or completely keep these dimensions from being loaded at start up?

because this is causing my server to run at 99% on a 2.1GHz Quad core intel i3 and use 5.5Gb of ram at all times

 

Also is there a way to speed up chunk loading, i see an option in the Forgechunkloading.cfg but it doesn't specify what the memory is measured in. eg kb, mb, gb

 

any help appreciated, sorry if i post this in the wrong section.

[Stilleraben]

ya thats the most obvious fix but would you happen to know what the cache size in the forgechunkloading.cfg is measured in?

 

[Stilleraben]

whoops, set it to 512 thinking it was in mb