PMDATRIVIAL(1)PMDATRIVIAL(1)NAMEpmdatrivial - trivial performance metrics domain agent (PMDA)
SYNOPSIS
$PCP_PMDAS_DIR/trivial/pmdatrivial [-d domain] [-l logfile] [-U user‐
name]
DESCRIPTIONpmdatrivial is the simplest possible Performance Metrics Domain Agent
(PMDA) which exports a single performance metric, the time in seconds
since the 1st of January, 1970.
The trivial PMDA is shipped as source code and is designed to be an aid
for PMDA developers.
A brief description of the pmdatrivial command line options follows:
-d It is absolutely crucial that the performance metrics domain num‐
ber 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.
-l Location of the log file. By default, a log file named triv‐
ial.log is written in the current directory of pmcd(1) when pmda‐
trivial is started, i.e. $PCP_LOG_DIR/pmcd. If the log file can‐
not 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 trivial
performance metrics, do the following as root:
# cd $PCP_PMDAS_DIR/trivial
# ./Install
If you want to undo the installation, do the following as root:
# cd $PCP_PMDAS_DIR/trivial
# ./Remove
pmdatrivial 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 pmdatrivial
$PCP_PMDAS_DIR/trivial/help
default help text file for the trivial metrics
$PCP_PMDAS_DIR/trivial/Install
installation script for the pmdatrivial agent
$PCP_PMDAS_DIR/trivial/Remove
undo installation script for the pmdatrivial agent
$PCP_LOG_DIR/pmcd/trivial.log
default log file for error messages and other information
from pmdatrivialPCP 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 ALSOPCPIntro(1), pmcd(1), pmdasample(1), pmdasimple(1), pmdatxmon(1) and
PMDA(3).
Performance Co-Pilot PCP PMDATRIVIAL(1)
