PCAA> SHOW DATAFILE
  Performance Data File: USRD$:[USER]PRIMES.PCA;1
  PCAA> MERGE PRIMES.OLD;*
   Merging file USRD$:[USER]PRIMES.OLD;2
   Merging file USRD$:[USER]PRIMES.OLD;1
  PCAA>

      The MERGE command is used above to merge the contents of
      all the versions of the performance data file PRIMES.OLD
      found in the current default directory into the currently set
      performance data file, PRIMES.PCA;1.

  PCAA> MERGE/SPM=2A80B7/BEFORE="4-JUL-1987" SPM1.DAT,SPM2.DAT

      This MERGE command will merge into the currently set
      performance data file any PC sampling data found in the SPM
      data files SPM1.DAT and SPM2.DAT that have been collected
      before July 4, 1987 for the process whose id number was
      002A80B7 (hexadecimal).