pmlogger_merge(1) — Linux manual page


PMLOGGER_MERGE(1)        General Commands Manual       PMLOGGER_MERGE(1)

NAME         top

       pmlogger_merge - helper script to merge Performance Co-Pilot

SYNOPSIS         top

       $PCP_BINADM_DIR/pmlogger_merge [-fNVE?]  [input-basename ...

DESCRIPTION         top

       pmlogger_merge is a helper script that is used by
       pmlogger_daily(1) when merging all of the Performance Co-Pilot
       (PCP) archives for a single host on a single day into a combined
       PCP archive.

       pmlogger_merge is a wrapper script for pmlogextract(1) that
       merges all of the archives matching the input-basename arguments,
       and creates a new archive using output-name as the base name for
       the physical files that constitute an archive.  The input-
       basename arguments may contain meta characters in the style of

OPTIONS         top

       The available command line options are:

       -f, --force
            This option causes all of the input files to be removed once
            the output archive has been created.

       -N, --showme
            Runs pmlogger_merge in a ``show me'' or ``dry run'' mode
            where the tasks that would be performed are reported, but no
            changes are made.  This is typically used for debugging in
            combination with one (verbose) or two (very verbose) -V

       -V, --verbose
            Increase verbosity in the output progress report.

       -E, --expunge
            When metric metadata differences are encountered between
            archives to be merged, the default behaviour is for
            pmlogger_merge to fail with a fatal error and the output-
            name archive is not created.  The -E flag instead issues a
            warning and excludes the affected metrics from the merged
            output archive.  This is intended for automated daily
            archive rotation where it is highly desirable for unattended
            daily archive merging, rewriting and compression to succeed.
            See also pmlogger_daily(1) and the -x flag to

       -?, --help
            Display usage message and exit.


       Environment variables with the prefix PCP_ are used to
       parameterize the file and directory names used by PCP.  On each
       installation, the file /etc/pcp.conf contains the local values
       for these variables.  The $PCP_CONF variable may be used to
       specify an alternative configuration file, as described in

SEE ALSO         top

       PCPIntro(1), pmlogextract(1), pmlogger(1) and pmlogger_daily(1).

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at 
       ⟨⟩.  If you have a bug report for this manual
       page, send it to  This page was obtained from the
       project's upstream Git repository
       ⟨⟩ on 2023-12-22.
       (At that time, the date of the most recent commit that was found
       in the repository was 2023-12-16.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

Performance Co-Pilot               PCP                 PMLOGGER_MERGE(1)

Pages that refer to this page: pmlogger_daily(1)