Well straight to the point, my server uses 2144 MB or ram from 4950 MB available with 4 people on it. List of plugins: Yes I admit there are a lot of plugins. anyone? EDIT by Moderator: merged posts, please use the edit button instead of double posting.
Try using NoLaggExamine, a part of the plugin NoLagg, to check which plugins/processes are using large amounts of memory. Also, if you are running Minecraft and the server on the same computer this is a common cause of increased memory usage/lag.
thank you very much, i was unaware of the fact that nolagg has an examine feature. Really greatful for you helping me and for the fact of the matter, the server is hosted on a dedi server.
This tool examines time for something to execute. I don't see anything mentioning measuring memory usage. Do note that java will, over time, use all the heap space you assign it even if there is no memory leak.