pmdasimple is a simple Performance Metrics Domain Agent (PMDA) which
exports a small number of synthetic performance metrics.
The simple PMDA is shipped as source code and is designed to be an
aid for PMDA developers. In terms of code size and features, it is
more complex than the trivial PMDA, about the same as the txmon PMDA
and less complex than the sample PMDA. The source for the simple
PMDA is a good template from which production, customized PMDAs can
A brief description of the pmdasimple 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.
-i Expect PMCD to connect to pmdasimple on the specified TCP/IP
port. port may be a port number or port name.
-l Location of the log file. By default, a log file named
simple.log is written in the current directory of pmcd(1) when
pmdasimple 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.
-p Expect PMCD to create a pipe and the connection to pmdasimple is
via standard input and standard output. This is the default
-u Expect PMCD to connect to pmdasimple on the Unix domain socket
-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
At most one of the options -i, -p and -u may be specified.
If you want access the names, help text and values for the simple
performance metrics, do the following as root:
# cd $PCP_PMDAS_DIR/simple
If you want to undo the installation, do the following as root:
# cd $PCP_PMDAS_DIR/simple
pmdasimple is launched by pmcd(1) and should never be executed
directly. The Install and Remove scripts notify pmcd(1) when the
agent is installed or removed.
command line options used to launch pmdasimple$PCP_PMDAS_DIR/simple/help
default help text file for the simple metrics
installation script for the pmdasimple agent
undo installation script for the pmdasimple agent
configuration file for the dynamic instance domain that
underlies the simple.now performance metric. For a
description, refer to the help text file, or run the
$ pminfo -T simple.now
The DSO version of the PMDA. The same source is used to
create both the DSO and the daemon versions of the simple
PMDA, and one or the other may be installed as part of the
dialog in the Install script.
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
email@example.com. 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 PMDASIMPLE(1)