PVDELAY defines how long entries can remain in the PV signed-on-from list for the remote system, which means that their passwords do not need to be revalidated for each attach request. For information on specifying a value for PVDELAY, see the CICS® System Definition Guide. See the CICS Performance Guide for information on tuning.
When persistent verification is in operation for a remote user, and that user is removed from the PV signed-on-from list, CICS informs the remote system by issuing a sign-off request for the user to remove the entry from the PV signed-on-to list in the remote system.
If you specify ATTACHSEC(VERIFY), the remote user's password is checked for every attach request. This is to ensure that the user has authority to access this system, to verify that this password is correct, and to establish security authorities for the user.