For those applications that have the same image running in
    parallel, each process can gather data with PCA and write it to
    its own data file. Note that you can use the SET PROMPT Collector
    command to easier distinguish among all the simultaneous data
    collection runs.

    When the application is finished, PCA's MERGE command can be used
    in the Analyzer to view all the data as a whole. For information
    on the MERGE command, see the MERGE entry in PCA HELP.