pmdashping(1) — Linux manual page


PMDASHPING(1)              General Commands Manual             PMDASHPING(1)

NAME         top

       pmdashping - "shell-ping" performance metrics domain agent

SYNOPSIS         top

       $PCP_PMDAS_DIR/shping/pmdashping [-C] [-d domain] [-l logfile] [-I
       interval] [-t timeout] [-U username] configfile

DESCRIPTION         top

       pmdashping is a Performance Metrics Domain Agent (PMDA) which exports
       quality of service and response time measurements for arbitrary
       commands as might be run from a shell such as sh(1).

       These measurements are intended to be used to quantify service
       quality and service availability for those services that are either
       mission critical or act as early indicators of adverse system

       The sample configuration monitors simple shell commands (exit and
       date(1)), a short computationally intensive task using sum(1), a
       short C compilation, DNS lookup via nslookup(1), YP lookup via
       ypcat(1), bind/portmapper service using rpcbind(1), SMTP by
       connecting to telnet port 25 and sending an ``expn root'' request,
       and NNTP by connecting to telnet port 119 and running a ``listgroup''

       It is expected that other commands would follow the examples in the
       sample configuration file, and most deployments of the pmdashping
       PMDA are expected to use a customized configuration file.

       A brief description of the pmdashping command line options follows:

       -C   Parse configfile, reporting any errors and exiting with non-zero
            status if the file contains syntactical errors.

       -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.

       -l   Location of the log file.  By default, a log file named
            shping.log is written in the current directory of pmcd(1) when
            pmdashping 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.

       -I   Amount of time (in seconds) between subsequent executions of the
            list of commands provided via the configuration file configfile.
            The default is 2 minutes.

       -t   Amount of time (in seconds) to wait before timing out awaiting a
            response for a command from configfile.  The default is 20

       -U   User account under which to run the agent and all commands.  The
            default is the unprivileged "pcp" account in current versions of
            PCP, but in older versions the superuser account ("root") was
            used by default.

       The required configfile specifies ``tag'' and ``command'' pairs, each
       on a separate line.  All of the commands are run one after another,
       with the whole group rescheduled to be run once per interval.  For
       each command that is run, pmdashping records information related to
       the success (or timeout), exit status, elapsed time and CPU time
       (system and user), and this information is exported by the PMDA.  The
       tags are used to identify the individual commands amongst the values
       exported by the PMDA, and form the external instance domain
       identifiers for the pmdashping metrics which relate to each command.

INSTALLATION         top

       In order for a host to export the names, help text and values for the
       shping performance metrics, do the following as root:

            # cd $PCP_PMDAS_DIR/shping
            # ./Install

       The set of ``tag'' and ``command'' pairs may be specified from a
       default (sample) configuration file, a customized file or entered
       interactively as part of the Install script.

       If you want to undo the installation, do the following as root:

            # cd $PCP_PMDAS_DIR/shping
            # ./Remove

       pmdashping 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         top

                 command line options used to launch pmdashping
                 default help text file for the shping metrics
                 example configuration file with a number of common commands
                 installation script for the pmdashping agent
                 undo installation script for pmdashping
                 default log file for error messages and other information
                 from pmdashping


       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 ALSO         top

       PCPIntro(1), pmcd(1) and pcp-shping(1).

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at ⟨⟩.
       If you have a bug report for this manual page, send it to  This page was obtained from the project's upstream
       Git repository ⟨⟩ on
       2020-08-13.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-08-11.)  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                       PMDASHPING(1)

Pages that refer to this page: autofsd-probe(1)pcp-shping(1)telnet-probe(1)