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CentOS 7.0 - man page for pmclient (centos section 1)

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PMCLIENT(1)									      PMCLIENT(1)

NAME
       pmclient - a simple performance metrics client

SYNOPSIS
       pmclient  [-a archive] [-h host] [-n pmnsfile] [-p] [-S numsec] [-s samples] [-t interval]
       [-Z timezone] [-z]

DESCRIPTION
       pmclient is a simple client that uses  the  Performance	Metrics  Application  Programming
       Interface (PMAPI) to report some high-level system performance metrics.

       The  real  value  of  pmclient is as a sample client using the PMAPI(3), interfaces and to
       this end the source code is included with the  Performance  Co-Pilot  (PCP)  package  (see
       PCPIntro(1)), and is typically installed in /usr/share/pcp/demos/pmclient.

       Normally  pmclient operates on the distributed Performance Metrics Name Space (PMNS), how-
       ever if the -n option is specified an alternative local PMNS is loaded from the file pmns-
       file.

       Unless  directed  to  another  host  by	the -h option, or to an archive by the -a option,
       pmclient will contact the Performance Metrics Collector Daemon (PMCD) on the local host to
       obtain the required information.  The -a and -h options are mutually exclusive.

       By default, pmclient reports the time of day according to the local timezone on the system
       where pmclient is run.  The -Z option changes the timezone to timezone in  the  format  of
       the  environment  variable TZ as described in environ(5).  The -z option changes the time-
       zone to the local timezone at the host that is the source of the performance  metrics,  as
       identified via either the -h or -a options.

       Other options control the specific information to be reported.

       -p     The  default behavior for replaying an archive, is to replay at full speed.  The -p
	      option may be used in conjunction with an archive, to request that  the  prevailing
	      real-time delay be applied between samples (see -t) to effect a pause.

       -S numsec
	      The  -S  option  may be used in conjunction with an archive to request that display
	      start at the time numsec seconds from the start of the archive.

       -s samples
	      The argument samples defines the number of samples to be	retrieved  and	reported.
	      If  samples  is  0 or -s is not specified, pmclient will sample and report continu-
	      ously (in real time mode) or until the end of the PCP archive (in archive mode).

       -t interval
	      The default update interval may be set to something other than the default  5  sec-
	      onds.   The  interval  argument follows the syntax described in PCPIntro(1), and in
	      the simplest form may be an unsigned integer (the implied units in  this	case  are
	      seconds).

       The output from pmclient is directed to standard output, and lists

       +  Aggregate CPU utilization, in the range 0 to 1.

       +  If  the system has more than 1 CPU, the ordinal number of the busiest CPU, in the range
	  0 to ...

       +  If the system has more than 1 CPU, the CPU utilization for the busiest CPU.

       +  Real free memory in Mbytes.

       +  Aggregate physical disk I/O operations per second (IOPS).

       +  Load average over the last 1 minute and over the last 15 minutes.

FILES
       $PCP_VAR_DIR/pmns/*
		 default PMNS specification files
       $PCP_DEMOS_DIR/pmclient
		 source code and Makefiles when pcp.sw.demo is installed
       $PCP_SYSCONF_DIR/pmlogger/config.pmclient
		 pmlogger(1) configuration for creating  an  archive  suitable	for  replay  with
		 pmclient

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
       PCPIntro(1),  pmcd(1),  pmchart(1),  pmgenmap(1),  pmstat(1),  PMAPI(3),  pcp.conf(5)  and
       pcp.env(5).

DIAGNOSTICS
       All are generated on standard error, and are intended to be self-explanatory.

Performance Co-Pilot			       PCP				      PMCLIENT(1)
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