You can collect both scalar and vector PC samples during a
    collection run. The timer intervals must be the same for both
    types of PC sampling. If you have set different intervals
    for each, the Collector uses the timer interval of the last
    sampling command entered. The following example shows setting
    the timer interval to 20 milliseconds for CPU sampling, and 100
    milliseconds for vector CPU sampling.

  PCAC> SET CPU_SAMPLING/INTERVAL:20
  PCAC> SET VCPU_SAMPLING/INTERVAL:100

    In the example above, the interval for both CPU sampling and PC
    sampling is set to 100 milliseconds.