pmnsadd(1) — Linux manual page


PMNSADD(1)               General Commands Manual              PMNSADD(1)

NAME         top

       pmnsadd - add new names to the Performance Co-Pilot PMNS

SYNOPSIS         top

       $PCP_BINADM_DIR/pmnsadd [-?]  [-n namespace] file

DESCRIPTION         top

       pmnsmerge(1) performs the same function as pmnsadd and is faster,
       more robust and more flexible.  It is therefore recommended that
       pmnsmerge(1) be used instead.

       pmnsadd adds subtree(s) of new names into a Performance Metrics
       Name Space (PMNS), as used by the components of the Performance
       Co-Pilot (PCP).

       Normally pmnsadd 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 new names are specified in the file, arguments and conform to
       the syntax for PMNS specifications, see PMNS(5).  There is one
       PMNS subtree in each file, and the base PMNS pathname to the
       inserted subtree is identified by the first group named in each
       file, e.g. if the specifications begin

                     mumble    123:45:1
                     fumble    123:45:2

       then the new names will be added into the PMNS at the non-leaf
       position identified by, and following all other
       names with the prefix

       The new names must be contained within a single subtree of the
       namespace.  If disjoint subtrees need to be added, these must be
       packaged into separate files and pmnsadd used on each, one at a

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

       As a special case, if file contains a line that begins root {
       then it is assumed to be a complete PMNS that needs to be merged,
       so none of the subtree extraction and rewriting is performed and
       file is handed directly to pmnsmerge(1).

       Provided some initial integrity checks are satisfied, pmnsadd
       will update the PMNS using pmnsmerge(1) - if this fails for any
       reason, the original namespace remains unchanged.

OPTIONS         top

       The available command line options are:

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

       -?   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

       pmnsdel(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 2024-06-14.
       (At that time, the date of the most recent commit that was found
       in the repository was 2024-06-14.)  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                        PMNSADD(1)

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