pmdaapache(1) — Linux manual page


PMDAAPACHE(1)            General Commands Manual           PMDAAPACHE(1)

NAME         top

       pmdaapache - Apache2 web server performance metrics domain agent

SYNOPSIS         top

       $PCP_PMDAS_DIR/apache/pmdaapache [-d domain] [-l logfile] [-U
       username] [-S server] [-P port] [-L location]

DESCRIPTION         top

       pmdaapache is a Performance Metrics Domain Agent (PMDA) which
       extracts performance metrics describing the state of an Apache
       web server.

       The apache PMDA exports metrics that measure the request rate,
       cumulative request sizes, uptime and various connection states
       for active clients.

       This information is obtained by performing a HTTP request to the
       server status URL, which must be enabled in the httpd.conf
       configuration file.

            ExtendedStatus on
            <Location /server-status>
            SetHandler server-status
            Order deny,allow
            Deny from all
            Allow from localhost

       A brief description of the pmdaapache command line options

       -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
            apache.log is written in the current directory of pmcd(1)
            when pmdaapache 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.

       -S   Query the Apache status information from the named server
            rather than the local host.

       -P   Query the Apache status information from the given port
            rather than the default (80).

       -L   Specify an alternative location for finding the server-
            status page.

       -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 default.

INSTALLATION         top

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

            # cd $PCP_PMDAS_DIR/apache
            # ./Install

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

            # cd $PCP_PMDAS_DIR/apache
            # ./Remove

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


       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

SEE ALSO         top

       PCPIntro(1), httpd(8), pmcd(1), pcp.conf(5) and pcp.env(5).

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 2023-12-22.
       (At that time, the date of the most recent commit that was found
       in the repository was 2023-12-16.)  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                     PMDAAPACHE(1)

Pages that refer to this page: pcp-atop(1)pmhttpnewclient(3)