pmdamemcache(1) — Linux manual page

PMDAMEMCACHE(1)          General Commands Manual         PMDAMEMCACHE(1)

NAME

       pmdamemcache - memcached performance metrics domain agent (PMDA)

DESCRIPTION

       This PMDA extracts performance data from memcached, a distributed
       memory caching daemon commonly used to improve web serving
       performance.  A farm of memcached processes over multiple servers
       can be utilised by a single web application, increasing the total
       available object cache size, and decreasing the database load
       associated with smaller cache sizes.  This system is described in
       detail at http://www.danga.com/memcached .

INSTALLATION

       Configure pmdamemcache to extract the values from set of hosts
       used in the memcache farm.  These hosts can be listed in the
       $PCP_PMDAS_DIR/memcache/memcache.conf file, in the format (i.e.
       Perl array) described at the top of pmdamemcache.pl.  A custom
       refresh rate can also be configured using this mechanism.

            # cd $PCP_PMDAS_DIR/memcache
            # [ edit memcache.conf ]

       Once this is setup, you can access the names and values for the
       memcache performance metrics by doing the following as root:

            # cd $PCP_PMDAS_DIR/memcache
            # ./Install

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

            # cd $PCP_PMDAS_DIR/memcache
            # ./Remove

       pmdamemcache 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

       $PCP_PMDAS_DIR/memcache/memcache.conf
           optional configuration file listing monitored memcache
           instances

       $PCP_PMDAS_DIR/memcache/Install
           installation script for the pmdamemcache agent

       $PCP_PMDAS_DIR/memcache/Remove
           undo installation script for the pmdamemcache agent

       $PCP_LOG_DIR/pmcd/memcache.log
           default log file for error messages from pmdamemcache

PCP ENVIRONMENT

       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

       PCPIntro(1) and pmcd(1).

COLOPHON

       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 2024-06-14.
       (At that time, the date of the most recent commit that was found
       in the repository was 2024-06-14.)  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
       man-pages@man7.org

Performance Co-Pilot               PCP                   PMDAMEMCACHE(1)

Pages that refer to this page: pmdanutcracker(1)

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