PMDAAPACHE(1) General Commands Manual PMDAAPACHE(1)
pmdaapache - Apache2 web server performance metrics domain agent (PMDA)
$PCP_PMDAS_DIR/apache/pmdaapache [-d domain] [-l logfile] [-U username] [-S server] [-P port] [-L location]
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 </Location> A brief description of the pmdaapache 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 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.
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.
$PCP_PMCDCONF_PATH command line options used to launch pmdaapache $PCP_PMDAS_DIR/apache/help default help text file for the apache metrics $PCP_PMDAS_DIR/apache/Install installation script for the pmdaapache agent $PCP_PMDAS_DIR/apache/Remove undo installation script for the pmdaapache agent $PCP_LOG_DIR/pmcd/apache.log 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 pcp.conf(5).
PCPIntro(1), httpd(8), pmcd(1), pcp.conf(5) and pcp.env(5).
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 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 email@example.com Performance Co-Pilot PCP PMDAAPACHE(1)
Pages that refer to this page: pcp-atop(1), pmhttpClientFetch(3), pmhttpFreeClient(3), pmhttpnewclient(3), pmhttpNewClient(3)