15.10 - How APRC Works - Call-Level Interface Version 2

Teradata Call-Level Interface Version 2 Reference for Mainframe-Attached Systems

Call-Level Interface Version 2
Programming Reference

APRC restricts the number of Teradata Database restarts triggered by AP resets to only those occurrences where a restart is essential. The estimated net result of enabling APRC is the elimination of from 75 to 90 percent of restarts initiated by AP Resets. (Before APRC was implemented, a restart was automatically triggered whenever an active AP in the current configuration was reset.)

In the case of a resetting AP, there is a short delay while reconnects through other APs are performed, but the longer delay usually associated with a restart is not necessary.