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

    AWSTIME specifies the minimum amount of processor time that
    must elapse for the system to collect a significant sample of
    a working set's page fault rate. The time is expressed in units
    of 10 milliseconds. The default value of 20, for example, is 200
    milliseconds.

    Some application configurations that have a large number of
    memory-intensive processes may benefit if the value is reduced.
    The value can be as low as 4.

    AWSTIME expiration is checked only at quantum end. Reducing its
    value and not reducing QUANTUM effectively sets the value of
    AWSTIME equal to the value of QUANTUM.

    AWSTIME is a DYNAMIC parameter.