What does SLEEP function does in Fast load?
The SLEEP command specifies the amount minutes to wait before retrying to logon and establish all sessions.
Sleep command can be used with all load utilities not only fastload.
This situation can occur if all of the loader slots are used or if the number of requested sessions is not available. The default value is 6 minutes. If tenacity was set to 2 hours and sleep 10 minutes, Sleep command will try to logon for every 10 minutes up to 2 hours duration.