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NAME | DESCRIPTION | INSTALLATION | FILES | PCP ENVIRONMENT | SEE ALSO | COLOPHON |
PMDAMEMCACHE(1) General Commands Manual PMDAMEMCACHE(1)
pmdamemcache - memcached performance metrics domain agent (PMDA)
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.
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.
$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
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).
pmcd(1).
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 2017-07-05. 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)