pmdasockets is a Performance Metrics Domain Agent (PMDA) which
exports metric values for current sockets on the local system.
This PMDA currently collects its data through the ss(8) utility
and requires that the program is installed in order to function.
This dependency may change in the future.
To install (enable) the sockets PMDA, do the following as root:
# cd $PCP_PMDAS_DIR/sockets# ./Install
To uninstall (disable), do the following as root:
# cd $PCP_PMDAS_DIR/sockets# ./Removepmdasockets 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.
The string valued metric network.persocket.filter specifies the
ss(1) filter to be applied to optionally select socket states, IP
addresses and other options that pmdasockets will collect (to
populate it's instance domain). By default, this is stateconnected meaning only sockets in the connected state will be
included. This can be changed dynamically by using pmstore(1) to
store a new filter string in the network.persocket.filter metric.
# pmstore network.persocket.filter "state all"
will change the filter to include sockets in all states. Note
that the filter string is not persisted across PMDA restarts or
reboots (this may change in the future). For further details of
the filter syntax and options, consult ss(8).
The pmlogconf(1) configuration file for pmdasockets is
$PCP_VAR_DIR is typically /var/lib/pcp) which specifies to log
all metrics below network.persocket in the PCP namespace with a
default sampling interval of 60 seconds. The logging interval
and metrics to be logged can be changed by editing that file and
then restarting the pmlogger service. For details of the syntax,
The metrics and metadata supported by pmdasockets correspond to
fields reported by ss -noemitauOH and are also available as help
text provided by the PMDA, e.g. to list all metrics, metadata
descriptors and help text:
# pminfo -fmdtT network.persocket
Note that the PMDA must be installed (enabled) for this command
to work correctly, see above.
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
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
⟨https://github.com/performancecopilot/pcp.git⟩ on 2021-04-01.
(At that time, the date of the most recent commit that was found
in the repository was 2021-04-01.) 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 to
Performance Co-Pilot PCP PMDASOCKETS(1)