Determining Space Information (Informix) 
Use
You can use this procedure to determine space and parameters of archiving objects and tables for your Informix database. For more information, see
Data Archiving.Procedure
For more information on how to do this, see
Displaying Archiving Objects and Tables.The system displays information about the last archiving run for the selected object, followed by space information for each table in the object.
Result
You can use the displayed information to decide what to archive. For more information if you want to start or schedule data archiving, see
Archive Management.