агент домена метрик производительности memcached (PMDA) (memcached performance metrics domain agent (PMDA))
Имя (Name)
pmdamemcache - memcached performance metrics domain agent (PMDA)
Описание (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 .
Установка (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.
Файлы (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
Окружение PCP (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).
Смотри также (See also)
PCPIntro(1) and pmcd(1).
