Logging performance stats externally

I suppose the best way to do it depends on the structure of your application and what data you need to collect. Data about connected clients and streams can be obtained through your application, but if you want to track data transfer, bandwidth usage, license usage, etc.... you'll need to make a connection to the admin service.

You can use a .swf to retrieve the data as FMS-Developer mentioned, but you can also have that happen on the server side. You can build an FMS app that will run with no connected clients, and report server stats back to your remoting service, XML socket server, or to any app server that accepts http post/get requests. If you don't use an .swf, you just need to design the app so it doesn't shut down when the server does garbage collection (return false in your onAppStop handler), and you'd need to start it through the admin console.

Since most of the http side backend I do is PHP I prefer to use AMFPHP for things like this, but there are a world of otheroptions. If you provide some detail about the data you need to collect and how you need to collect it, and about your server/application server/web service model, maybe we can come up with ideas about the best option.