NAME

       pmdatrivial - trivial performance metrics domain agent (PMDA)

SYNOPSIS

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

DESCRIPTION

       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 default.

INSTALLATION

       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

       $PCP_PMCDCONF_PATH
                 command line options used to launch pmdatrivial
       $PCP_PMDAS_DIR/trivial/help
                 default help text file for the trivial metrics
       $PCP_PMDAS_DIR/trivial/Install
                 installation script for the pmdatrivial agent
       $PCP_PMDAS_DIR/trivial/Remove
                 undo installation script for the pmdatrivial agent
       $PCP_LOG_DIR/pmcd/trivial.log
                 default log file for error messages and other information from pmdatrivial

PCP ENVIRONMENT

       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

       PCPIntro(1), pmcd(1), pmdasample(1), pmdasimple(1), pmdatxmon(1) and PMDA(3).