NAME

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

SYNOPSIS

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

DESCRIPTION

       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.

CAVEAT

       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

       $PCP_VAR_DIR/pmns/root   the default PMNS, when then environment variable PMNS_DEFAULT  is
                                unset

PCP ENVIRONMENT

       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

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