In large tables, paging performance is typically degraded because of the REFRESH(*ALWAYS) parameter on the Start SQL (STRSQL) command which dynamically retrieves the latest data directly from the table. Paging performance can be improved by specifying REFRESH(*FORWARD).
When interactively displaying data using REFRESH(*FORWARD), the results of a select-statement are copied to a temporary table as you page forward through the display. Other users sharing the table can make changes to the rows while you are displaying the select-statement results. If you page backward or forward to rows that have already been displayed, the rows shown are those in the temporary table instead of those in the updated table.
The refresh option can be changed on the Session Services display.