NAME

       pmdamemcache - memcache 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
           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

SEE ALSO

       pmcd(1) and memcached(1).