pmdasummary(1) — Linux manual page


PMDASUMMARY(1)           General Commands Manual          PMDASUMMARY(1)

NAME         top

       pmdasummary - summary performance metrics domain agent (PMDA)

SYNOPSIS         top

       $PCP_PMDAS_DIR/summary/pmdasummary [-d domain] [-h helpfile] [-l
       logfile] [-U username] pmie-command-line

DESCRIPTION         top

       pmdasummary is a Performance Metrics Domain Agent (PMDA) which
       derives performance metrics values from values made available by
       other PMDAs.  pmdasummary consists of two processes:

       pmie process
              The inference engine for performance values pmie(1) is
              used to periodically sample values for the base metrics
              and compute the derived values.  This process is launched
              with the given pmie-command-line arguments by the main
              process, described below.

       main process
              The main process reads and buffers the values computed by
              pmie(1) and makes them available to the performance
              metrics collector daemon pmcd(1).

       A brief description of the pmdasummary command line options

       -d   It is absolutely crucial that the performance metrics domain
            number specified here is unique and consistent.  That is,
            domain should be different for every PMDA on the one host,
            and the same domain number should be used for the same PMDA
            on all hosts.

       -h   This option specifies an alternative help text file helpfile
            for describing the metrics that pmdasummary represents.

       -l   Location of the log file.  By default, a log file named
            summary.log is written in the current directory of pmcd(1)
            when pmdasummary is started, i.e.  $PCP_LOG_DIR/pmcd.  If
            the log file cannot be created or is not writable, output is
            written to the standard error instead.

       -U   User account under which to run the agent.  The default is
            the unprivileged "pcp" account in current versions of PCP,
            but in older versions the superuser account ("root") was
            used by default.

INSTALLATION         top

       If you want access to the names, help text and values for the
       summary performance metrics, do the following as root:

            # cd $PCP_PMDAS_DIR/summary
            # ./Install

       If you want to undo the installation, do the following as root:

            # cd $PCP_PMDAS_DIR/summary
            # ./Remove

       pmdasummary is launched by pmcd(1) and should never be executed
       directly.  The Install and Remove scripts notify pmcd(1) when the
       agent is installed or removed.

FILES         top

              command line options used to launch pmdasummary
              default pmie(1) expressions defining the summary metrics
              default help text for the summary metrics
              installation script for the pmdasummary agent
              undo installation script for the pmdasummary agent
              default log file for error messages and other information
              from pmdasummary


       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), pmcd(1) and pmie(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                    PMDASUMMARY(1)

Pages that refer to this page: pmie(1)