NAME | DESCRIPTION | INSTALLATION | FILES | PCP ENVIRONMENT | SEE ALSO | COLOPHON

PMDAMEMCACHE(1)            General Commands Manual           PMDAMEMCACHE(1)

NAME         top

       pmdamemcache - memcached performance metrics domain agent (PMDA)

DESCRIPTION         top

       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         top

       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

       To uninstall, 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         top

       $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         top

       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

       pmcd(1).

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@oss.sgi.com.  This page was obtained from the project's upstream
       Git repository ⟨git://git.pcp.io/pcp⟩ on 2017-05-03.  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)