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 (PCP).

       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 PMNS.

       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 unset


       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

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 2023-12-22.
       (At that time, the date of the most recent commit that was found
       in the repository was 2023-12-16.)  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)