It is actually not at the exact same time of the day. It varies but happens within certain blocks of time, like between 00hr and 02hr. The could be up for hours or it could crash again in 15 minutes. The memory is fine, just using a larger footprint than 0.6 in all ways.
The service keeps dieing at the same time every day and there is nothing in the app logs, it's going to be something external.Sorry but I'm not sure what the problem with the memory usage is. Is the server running out of memory, or is it experiencing a lot of GC ?