CraftServer Ping helps you understand how to configure your own MineCraft server, and get realtime information on your favorite servers. Not only will it tell you if servers you have entered are up and running, it will let you know how many players are on them, right from your iOS device!
Scan the list and see which servers have the least number of users and then you'll get the best performance from those.
The server.config information is for reference only, you won't be able to remotely change those parameters. It does give you detailed information on how to setup these files.