A client application sometimes "freezes" or begins responding very slowly. You may need to look at the IBM i side of the application. But can you can find it? This tip helps you track down the IBM i server job.
For the purposes of this discussion, a client application is a "program" that isn't running on the IBM i host, but is connecting to it using JDBC, or ODBC, or JT/400, or FTP, or TCP/IP, or some other communications technique. A client application might be the Rational Developer for i (RDi) IDE. It might be one of the free SQL clients like SQuirreL or SQL Workbench/J. It might be an FTP client. It might be a .NET application. Or something else entirely.