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pmdanutcracker(1) — Linux manual page

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

PMDANUTCRACKER(1)        General Commands Manual        PMDANUTCRACKER(1)

NAME         top

       pmdanutcracker - NutCracker performance metrics domain agent
       (PMDA)

DESCRIPTION         top

       This PMDA extracts performance data from NutCracker (or
       TwemProxy), a fast and lightweight proxy for memcached and Redis
       protocol.

INSTALLATION         top

       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.

FILES         top

       $PCP_PMDAS_DIR/nutcracker/nutcracker.conf
           mandatory configuration file listing monitored memcache or
           Redis instances

       $PCP_PMDAS_DIR/nutcracker/Install
           installation script for the pmdanutcracker agent

       $PCP_PMDAS_DIR/nutcracker/Remove
           undo installation script for the pmdanutcracker agent

       $PCP_LOG_DIR/pmcd/nutcracker.log
           default log file for error messages from pmdanutcracker

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

       PCPIntro(1), pmcd(1), pmdamemcache(1) and pmdaredis(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@groups.io.  This page was obtained from the
       project's upstream Git repository
       ⟨https://github.com/performancecopilot/pcp.git⟩ on 2025-08-11.
       (At that time, the date of the most recent commit that was found
       in the repository was 2025-08-11.)  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                  PMDANUTCRACKER(1)

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