pmdasummary(1)

NAME

   pmdasummary - summary performance metrics domain agent (PMDA)

SYNOPSIS

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

DESCRIPTION

   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 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.

   -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

   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

   $PCP_PMCDCONF_PATH
             command line options used to launch pmdasummary
   $PCP_PMDAS_DIR/summary/expr.pmie
             default pmie(1) expressions defining the summary metrics
   $PCP_PMDAS_DIR/summary/help
             default help text for the summary metrics
   $PCP_PMDAS_DIR/summary/Install
             installation script for the pmdasummary agent
   $PCP_PMDAS_DIR/summary/Remove
             undo installation script for the pmdasummary agent
   $PCP_LOG_DIR/pmcd/summary.log
             default log file for error  messages  and  other  information
             from pmdasummary

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

   pmcd(1) and pmie(1).

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