1PMDATRIVIAL(1) General Commands Manual PMDATRIVIAL(1)
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6 pmdatrivial - trivial performance metrics domain agent (PMDA)
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9 $PCP_PMDAS_DIR/trivial/pmdatrivial [-d domain] [-l logfile] [-U user‐
10 name]
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13 pmdatrivial is the simplest possible Performance Metrics Domain Agent
14 (PMDA) which exports a single performance metric, the time in seconds
15 since the 1st of January, 1970.
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17 The trivial PMDA is shipped as source code and is designed to be an aid
18 for PMDA developers.
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20 A brief description of the pmdatrivial command line options follows:
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22 -d It is absolutely crucial that the performance metrics domain num‐
23 ber specified here is unique and consistent. That is, domain
24 should be different for every PMDA on the one host, and the same
25 domain number should be used for the same PMDA on all hosts.
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27 -l Location of the log file. By default, a log file named triv‐
28 ial.log is written in the current directory of pmcd(1) when pmda‐
29 trivial is started, i.e. $PCP_LOG_DIR/pmcd. If the log file can‐
30 not be created or is not writable, output is written to the stan‐
31 dard error instead.
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33 -U User account under which to run the agent. The default is the
34 unprivileged "pcp" account in current versions of PCP, but in
35 older versions the superuser account ("root") was used by default.
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38 If you want access to the names, help text and values for the trivial
39 performance metrics, do the following as root:
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41 # cd $PCP_PMDAS_DIR/trivial
42 # ./Install
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44 If you want to undo the installation, do the following as root:
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46 # cd $PCP_PMDAS_DIR/trivial
47 # ./Remove
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49 pmdatrivial is launched by pmcd(1) and should never be executed
50 directly. The Install and Remove scripts notify pmcd(1) when the agent
51 is installed or removed.
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54 $PCP_PMCDCONF_PATH
55 command line options used to launch pmdatrivial
56 $PCP_PMDAS_DIR/trivial/help
57 default help text file for the trivial metrics
58 $PCP_PMDAS_DIR/trivial/Install
59 installation script for the pmdatrivial agent
60 $PCP_PMDAS_DIR/trivial/Remove
61 undo installation script for the pmdatrivial agent
62 $PCP_LOG_DIR/pmcd/trivial.log
63 default log file for error messages and other information
64 from pmdatrivial
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67 Environment variables with the prefix PCP_ are used to parameterize the
68 file and directory names used by PCP. On each installation, the file
69 /etc/pcp.conf contains the local values for these variables. The
70 $PCP_CONF variable may be used to specify an alternative configuration
71 file, as described in pcp.conf(5).
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74 PCPIntro(1), pmcd(1), pmdasample(1), pmdasimple(1), pmdatxmon(1) and
75 PMDA(3).
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79Performance Co-Pilot PCP PMDATRIVIAL(1)