Ressource-usage information

Hi all, we want (have) to do the following: * Provide database-services to several customers * Account each customer the actual used ressources To do this, we obviously need some information: * CPU- and IO-Usage per sesion * UserID, Hostname, application-name,... per seesion Does anybody know an easy way an easy way to get this kind of information out of Informix? Are there any packages, providing ressource-usage information? Thanx, Peter