Barabus

Hi all. I have recently got a wombat server hosting tekkit lite for around 5 mates. I have added Mo' Creatures to the server, (however i have reduced mob spawning to around 1/3 of original rate), and currently there is almost nothing on the server outside small vanilla constructions. (no excess machinery) The server uses around 700mb of RAM most of the time, which is what i would expect it to use. Then over time this ramps up to around 1.3GB. I receive no memory leak errors or anything out of the ordinary in my log files. Is it normal for a tekkit lite server to use this much RAM? - If so I guess i may have to remove some coremods - If NOT, any suggestions as to what may be causing this? Thanks for your help