PCAC> SHOW DATAFILE
  Performance Data File: DEV$:[PCA.TST]CUMU_MAIN_IO.PCA;1

      The SHOW DATAFILE command displays the name of the current
      performance data file.

  PCAC> SHOW DATAFILE/FULL
  Performance Data File: DEV$:[PCA.TST]CUMU_MAIN_IO.PCA;1
    Created by: PCA V1.0                 Last updated by: PCA V1.0
    Created on:25-MAR-1985 15:51:19.07   Last updated on:25-MAR-1985 15:51:30.62
   Image file: DEV$:[SAGER.TST]PCAPRIME.EXE;19
    Image name: PCAPRIME                         Image  ID: 01
    Image linked on:  8-MAR-1985 13:57:53.14     by Linker: 04-00
    There is 1 collection run
    The DST is 481 bytes long
    Known shareable images:
      FORRTL          LIBRTL          PCA$COLLECTOR   DBGSSISHR
      PCA$PRVSHR      LBRSHR          SMGSHR

      The /FULL qualifier gives more complete information about the
      data file.