Provided by: pcp_4.0.1-1_amd64 
NAME
pmclient, pmclient_fg - 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 and pmclient_fg are simple clients that use the Performance Metrics Application Programming
Interface (PMAPI) to report some high-level system performance metrics.
The real value of these tools is as sample clients 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.
The pmclient_fg program differs to pmclient in that it uses the fetchgroup API extension to the PMAPI,
see pmFetchGroup(3).
Normally pmclient operates on the distributed Performance Metrics Name Space (PMNS), however if the -n
option is specified an alternative local PMNS is loaded from the file pmnsfile.
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 argument to -a is a comma-separated list of names, each of which may be the base name
of an archive or the name of a directory containing one or more archives. 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(7). The -z option changes the timezone 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 a set of archives, is to replay at full speed. The -P option
may be used in conjunction with a set of archives, 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 a set of archives to request that display start at
the time numsec seconds from the start of the set of archives.
-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 continuously (in real time mode) or until
the end of the set of PCP archives (in archive mode).
-t interval
The default update interval may be set to something other than the default 5 seconds. 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_DEMOS_DIR/pmclient
source code, documentation, configuration files and Makefile when the PCP development package
is installed
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), pmchart(1), pmdumptext(1), pmgenmap(1), pminfo(1), pmrep(1), pmstat(1), pmval(1), PMAPI(3), pmFetchGroup(3), pcp.conf(5) and pcp.env(5).
DIAGNOSTICS
All are generated on standard error, and are intended to be self-explanatory.