pmdasimple(1) — Linux manual page


PMDASIMPLE(1)              General Commands Manual             PMDASIMPLE(1)

NAME         top

       pmdasimple - simple performance metrics domain agent (PMDA)

SYNOPSIS         top

       $PCP_PMDAS_DIR/simple/pmdasimple [-d domain] [-i port] [-l logfile]
       [-p] [-u socket] [-U username]

DESCRIPTION         top

       pmdasimple is a simple Performance Metrics Domain Agent (PMDA) which
       exports a small number of synthetic performance metrics.

       The simple PMDA is shipped as source code and is designed to be an
       aid for PMDA developers.  In terms of code size and features, it is
       more complex than the trivial PMDA, about the same as the txmon PMDA
       and less complex than the sample PMDA.  The source for the simple
       PMDA is a good template from which production, customized PMDAs can
       be developed.

       A brief description of the pmdasimple 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.

       -i   Expect PMCD to connect to pmdasimple on the specified TCP/IP
            port.  port may be a port number or port name.

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

       -p   Expect PMCD to create a pipe and the connection to pmdasimple is
            via standard input and standard output.  This is the default
            connection mode.

       -u   Expect PMCD to connect to pmdasimple on the Unix domain socket
            named socket.

       -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

       At most one of the options -i, -p and -u may be specified.

INSTALLATION         top

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

            # cd $PCP_PMDAS_DIR/simple
            # ./Install

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

            # cd $PCP_PMDAS_DIR/simple
            # ./Remove

       pmdasimple 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 pmdasimple
                 default help text file for the simple metrics
                 installation script for the pmdasimple agent
                 undo installation script for the pmdasimple agent
                 configuration file for the dynamic instance domain that
                 underlies the performance metric.  For a
                 description, refer to the help text file, or run the
                 $ pminfo -T
                 The DSO version of the PMDA.  The same source is used to
                 create both the DSO and the daemon versions of the simple
                 PMDA, and one or the other may be installed as part of the
                 dialog in the Install script.
                 default log file for error messages and other information
                 from pmdasimple


       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), pmdatrivial(1), pmdatxmon(1),
       PMDA(3), pcp.conf(5) and pcp.env(5).

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
       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                       PMDASIMPLE(1)

Pages that refer to this page: pmdasample(1)pmdatrivial(1)