1    /INTERVAL

    Specifies the sampling interval in milliseconds. The value of n
    must be at least 10 milliseconds and at most 60,000 milliseconds.
    Because the granularity of the system clock is 10 milliseconds,
    use a multiple of 10. The default sampling interval is 10
    milliseconds; therefore, you can use the /INTERVAL:n qualifier
    only to specify a longer sampling interval.

2    /STACK_PCS

    Specifies that stack PC values for vector CPU data are to be
    collected. The /STACK_PCS qualifier is the default upon entry
    into the Collector.

3    /NOSTACK_PCS

    Specifies that not stack PC values for vector CPU data are to be
    collected. If used, /NOSTACK_PCS causes further SET VCPU_SAMPLING
    requests to assume a default of /NOSTACK_PCS.