pmdasystemd - systemd performance metrics domain agent (PMDA)
$PCP_PMDAS_DIR/systemd/pmdasystemd [-f] [-d domain] [-l logfile] [-m memory] [-s interval]
pmdasystemd is a systemd log file monitoring Performance Metrics Domain Agent (PMDA). It
can be seen as analagous to the -f option to journalctl(1) and converts each new log line
into a performance event, suitable for consumption by PMAPI(3) client tools like
The systemd PMDA exports both event-style metrics reflecting timestamped event records for
messages logged to the system logs, as well as the more orthodox sample-style metrics such
as message counts and throughput size values.
A brief description of the pmdasystemd 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.
-f Disables per-uid/gid record filtering. By default the user and group credentials
will be used to filter log records returned to the client tool, preventing informa-
tion exposure to arbitrary users. This option disables that, so use only with
-l Location of the log file. By default, a log file named systemd.log is written in the
current directory of pmcd(1) when pmdasystemd is started, i.e. $PCP_LOG_DIR/pmcd.
If the log file cannot be created or is not writable, output is written to the stan-
dard error instead.
-m Limit the physical memory used by the PMDA to buffer event records to maxsize bytes.
As log events arrive at the PMDA, they must be buffered until individual client tools
request the next batch since their previous batch of events. The default maximum is
-s Sets the polling interval for detecting newly arrived log lines. Mirrors the same
option from the tail(1) command.
-U User account under which to run the agent. The default is the "adm" user account.
If you want access to the names, help text and values for the systemd performance metrics,
do the following as root:
# cd $PCP_PMDAS_DIR/systemd
If you want to undo the installation, do the following as root:
# cd $PCP_PMDAS_DIR/systemd
pmdasystemd 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 pmdasystemd
default help text file for the systemd metrics
installation script for the pmdasystemd agent
undo installation script for the pmdasystemd agent
default log file for error messages and other information from pmdasystemd
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 config-
uration file, as described in pcp.conf(5).
PCPIntro(1), pmcd(1), pmevent(1), journalctl(1), tail(1), PMAPI(3), pcp.conf(5) and
Performance Co-Pilot PCP PMDASYSTEMD(1)