table of contents
|PMDANUTCRACKER(1)||General Commands Manual||PMDANUTCRACKER(1)|
pmdanutcracker - NutCracker performance metrics domain agent (PMDA)
This PMDA extracts performance data from NutCracker (or TwemProxy), a fast and lightweight proxy for memcached and Redis protocol.
Configure to export statistics via its stats interface (see --stats-port option to the nutcracker server). The corresponding configuration must be reflected in the $PCP_PMDAS_DIR/nutcracker/nutcracker.conf file.
# cd $PCP_PMDAS_DIR/nutcracker # [ edit nutcracker.conf ]
Once this is setup, you can access the names and values for the nutcracker performance metrics by doing the following as root:
# cd $PCP_PMDAS_DIR/nutcracker # ./Install
To uninstall, the following must be done as root:
# cd $PCP_PMDAS_DIR/nutcracker # ./Remove
pmdanutcracker 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.
- mandatory configuration file listing monitored memcache or Redis instances
- installation script for the pmdanutcracker agent
- undo installation script for the pmdanutcracker agent
- default log file for error messages from pmdanutcracker
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).