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PMDASUMMARY(1)									   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 met-
	    rics 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  stan-
	    dard 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 config-
       uration file, as described in pcp.conf(5).

SEE ALSO
       pmcd(1) and pmie(1).

Performance Co-Pilot			       PCP				   PMDASUMMARY(1)
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