VMS Help Sys Parameters, PRCPOLINTERVAL  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    PRCPOLINTERVAL specifies, in seconds, the polling interval used
    to look for Systems Communications Services (SCS) applications,
    such as the connection manager and mass storage control protocol
    disks, on other nodes. All discovered nodes are polled during
    each interval.

    This parameter trades polling overhead against quick recognition
    of new systems or servers as they appear.

    PRCPOLINTERVAL is a DYNAMIC parameter. On Alpha systems,
    PRCPOLINTERVAL is also an AUTOGEN parameter.