Informix Database Auditing

Re : Informix Database Auditing Dear Informix Professional PS give me any suggestions of the following issues : 1. When the Informix Trusted facility is turned on, the engine write an audit record to log the update row event with tabid and rowid only. How can I log with the before image and column name of this updated record ? 2. How can I control the Informix engine to ignore the auditing evnets about temporary objects created by indvidual user's session such as temprary table? 3. Is any tools can manage the database auditing on Informix environment ? 4. How the performance degrade if using the trigger and stored procedure to perform auditing ? Thanks Jack M.