I’ve had people write and ask how they can see what’s happening on their server. There are a lot of ways to do this, but fseventer is the best I know.
This application offers a GUI to watch all things that are changing on your Mac. It “observes filesystem changes using the same underlying API as Spotlight” so it is pretty thorough.
This is also a handy way to see what files are being changed when you run an installation or an update on your server.
The app is free…but quite forward about donations each time you quit the app. Get it here.