I'm looking to install an IRC Daemon, as well as services (if they are not included in the IRC daemon) onto a virtual server with a variable amount of memory allocation, and I was wondering about how much RAM and CPU the daemon takes up on average, as well as what kind of behavior it demonstrates (CPU spikes, RAM spikes, things like that).

I'm leaning towards UnrealIRCD for the most part, but if there are daemons that are designed to be "light", I'm open to suggestions.