Report number of handles / file descriptors held by processes

[kinghrothgar]

It would be nice to be able to report the number of handles (Windows) or file descriptors (*nix) in the process metrics. I can implement the Linux side of things easily and with some trying might be able to manage the OpenBSD and Darwin implementation. I would much appreciate someone with more experience with C doing those though. I haven't looked into the Windows side of things yet.

[andrewkroh]

Linux/FreeBSD have been implemented. It would be nice to have the number of handles open by Windows processes. I don't think there are hard/soft limits in Windows.