txrecord(1) — Linux manual page


PMDATXMON(1)               General Commands Manual              PMDATXMON(1)

NAME         top

       pmdatxmon, txrecord, genload - txmon performance metrics domain agent

SYNOPSIS         top

       $PCP_PMDAS_DIR/txmon/pmdatxmon [-d domain] [-l logfile] [-U username]
       tx_type ...
       $PCP_PMDAS_DIR/txmon/txrecord [-l]
       $PCP_PMDAS_DIR/txmon/txrecord tx_type servtime [tx_type servtime ...

DESCRIPTION         top

       pmdatxmon is an example Performance Metrics Domain Agent (PMDA) which
       exports a small number of performance metrics from a simulated
       transaction monitor.

       The txmon PMDA is shipped as both binary and source code and is
       designed to be an aid for PMDA developers; the txmon PMDA
       demonstrates how performance data can be exported from an application
       (in this case txrecord) to the PCP infrastructure via a shared memory
       segment.  As a matter of convenience, pmdatxmon creates (and destroys
       on exit) the shared memory segment.

       The tx_type arguments are arbitrary unique tags used to identify
       different transaction types.

       The txrecord application simulates the processing of one or more
       transactions identified by tx_type and with an observed service time
       of servtime .

       With the -l option, txrecord displays the current summary of the
       transaction activity from the shared memory segment.

       genload is a shell and awk(1) script that acts as a front-end to
       txrecord to generate a constant load of simulated transaction

       A brief description of the pmdatxmon 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.

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

       -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

INSTALLATION         top

       If you want access to the names, help text and values for the txmon
       performance metrics, do the following as root:

            # cd $PCP_PMDAS_DIR/txmon
            # ./Install

       You will be prompted for the tx_type tags.

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

            # cd $PCP_PMDAS_DIR/txmon
            # ./Remove

       pmdatxmon 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 pmdatxmon
                 default help text file for the txmon metrics
                 installation script for the pmdatxmon agent
                 undo installation script for the pmdatxmon agent
                 default log file for error messages and other information
                 from pmdatxmon


       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), pmdasample(1), pmdatrivial(1), txmonvis(1) and

COLOPHON         top

       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
       pcp@groups.io.  This page was obtained from the project's upstream
       Git repository ⟨https://github.com/performancecopilot/pcp.git⟩ on
       2020-09-18.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-09-18.)  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                        PMDATXMON(1)