Why is the RAM full?
Currently ActiniumCloud shows the memory allocated by the JVM in the dashboard, not the actual memory occupied by the server, so all you see is the 100% usage. To see the actual memory used by the server, you can do the following.
After installing the Essentials plugin, use commands such as
/gc to display memory usage information.
/sponge heap command to display JVM information.
/status command to display server information, including memory.
BDS is developed in C++ and the memory shown in the dashboard is the real memory occupied by the Minecraft server.