pmnsdel(1) — Linux manual page


PMNSDEL(1)                 General Commands Manual                PMNSDEL(1)

NAME         top

       pmnsdel  -  delete  a  subtree of names from the Performance Co-Pilot

SYNOPSIS         top

       $PCP_BINADM_DIR/pmnsdel [-?]  [-n namespace] metricpath [...]

DESCRIPTION         top

       pmnsdel removes subtrees of names from a Performance Metrics Name
       Space (PMNS), as used by the components of the Performance Co-Pilot

       Normally pmnsdel operates on the default Performance Metrics Name
       Space (PMNS), however if the -n option is specified an alternative
       namespace is used from the file namespace.

       The default PMNS is found in the file $PCP_VAR_DIR/pmns/root unless
       the environment variable PMNS_DEFAULT is set, in which case the value
       is assumed to be the pathname to the file containing the default

       The metric names to be deleted are all those for which one of the
       metricpath arguments is a prefix in the PMNS, see PMNS(5).

       All of the files defining the PMNS must be located within the
       directory that contains the root of the PMNS, and this would
       typically be $PCP_VAR_DIR/pmns for the default PMNS, and this would
       typically imply running pmnsdel as root.

       Provided some initial integrity checks are satisfied, pmnsdel will
       update the necessary PMNS files.  Should an error be encountered the
       original namespace is restored.  Note that any PMNS files that are no
       longer referenced by the modified namespace will not be removed, even
       though their contents are not part of the new namespace.

OPTIONS         top

       The available command line options are:

       -n pmnsfile, --namespace=pmnsfile
            Load an alternative Performance Metrics Name Space (PMNS(5))
            from the file pmnsfile.

       -?, --help
            Display usage message and exit.

CAVEATS         top

       Once the writing of the new namespace file has begun, the signals
       SIGINT, SIGHUP and SIGTERM will be ignored to protect the integrity
       of the new files.

FILES         top

            the default PMNS, when the environment variable PMNS_DEFAULT is


       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

       pmnsadd(1), pmnsmerge(1), pcp.conf(5), pcp.env(5) and PMNS(5).

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at ⟨⟩.
       If you have a bug report for this manual page, send it to  This page was obtained from the project's upstream
       Git repository ⟨⟩ on
       2020-08-13.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-08-11.)  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

Performance Co-Pilot                 PCP                          PMNSDEL(1)

Pages that refer to this page: pmnsadd(1)pmnscomp(1)pmnsmerge(1)pmda(3)PMDA(3)