Informix equivalent to the Unix 'top' command?

Does anyone know of a database equivalent to the unix 'top' command (public domain) which would list the most resource hungry instance. I realise ontat -u might go someway to achieving this (assuming performance problems are user related) but is not ideal on a multi-instance machine where one window per instance (running onstat -u -r 5) is needed. The Solaris machine I'm looking after is a development box with 14 instances and having that many windows all running the same command is making my eyes go a bit funny TIA Paul Matthews