pmdatrivial(1) — Linux manual page


PMDATRIVIAL(1)             General Commands Manual            PMDATRIVIAL(1)

NAME         top

       pmdatrivial - trivial performance metrics domain agent (PMDA)

SYNOPSIS         top

       $PCP_PMDAS_DIR/trivial/pmdatrivial [-d domain] [-l logfile] [-U

DESCRIPTION         top

       pmdatrivial is the simplest possible Performance Metrics Domain Agent
       (PMDA) which exports a single performance metric, the time in seconds
       since the 1st of January, 1970.

       The trivial PMDA is shipped as source code and is designed to be an
       aid for PMDA developers.

       A brief description of the pmdatrivial command line options follows:

       -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.

       -l   Location of the log file.  By default, a log file named
            trivial.log is written in the current directory of pmcd(1) when
            pmdatrivial 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

INSTALLATION         top

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

            # cd $PCP_PMDAS_DIR/trivial
            # ./Install

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

            # cd $PCP_PMDAS_DIR/trivial
            # ./Remove

       pmdatrivial 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 pmdatrivial
                 default help text file for the trivial metrics
                 installation script for the pmdatrivial agent
                 undo installation script for the pmdatrivial agent
                 default log file for error messages and other information
                 from pmdatrivial


       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 pcp.conf(5).

SEE ALSO         top

       PCPIntro(1), pmcd(1), pmdasample(1), pmdasimple(1), pmdatxmon(1) and

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
       2020-08-13.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-08-11.)  If you discover any
       rendering problems in this HTML version of the page, or you believe
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       (which is not part of the original manual page), send a mail to

Performance Co-Pilot                 PCP                      PMDATRIVIAL(1)

Pages that refer to this page: genload(1)pmdasample(1)pmdasimple(1)pmdatxmon(1)txrecord(1)