The following is a demonstration of the pgpginbyproc.d script,

   # pgpginbyproc.d
   dtrace: description 'vminfo:::pgpgin ' matched 1 probe
   ^C
    
     ttymon                                                            1
     bash                                                              1
     mozilla-bin                                                      36
     tar                                                            6661

In the above output, tar processes have paged in 6661 pages from the filesystem.