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:
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
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
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
If you want to undo the installation, do the following as root:
# cd $PCP_PMDAS_DIR/summary
pmdasummary is launched by pmcd(1) and should never be executed
directly. The Install and Remove scripts notify pmcd(1) when the
agent is installed or removed.
command line options used to launch pmdasummary$PCP_PMDAS_DIR/summary/expr.pmie
default pmie(1) expressions defining the summary metrics
default help text for the summary metrics
installation script for the pmdasummary agent
undo installation script for the pmdasummary agent
default log file for error messages and other information
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).
This page is part of the PCP (Performance Co-Pilot) project.
Information about the project can be found at ⟨http://www.pcp.io/⟩.
If you have a bug report for this manual page, send it to
firstname.lastname@example.org. This page was obtained from the project's upstream
Git repository ⟨git://git.pcp.io/pcp⟩ on 2017-03-13. If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page, or
you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
Performance Co-Pilot PCP PMDASUMMARY(1)