Library /sys$common/syshlp/pca$help.hlb SPM  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    PC sampling data collected by the VAX Software Performance
    Monitor (SPM) can be merged into PCA performance data files with
    the Analyzer MERGE/SPM_PROCESS_ID command, to be subsequently
    analyzed by the Analyzer. See HELP MERGE for more information.