pmlogdump(1) — Linux manual page


PMLOGDUMP(1)             General Commands Manual            PMLOGDUMP(1)

NAME         top

       pmlogdump, pmdumplog - dump internal details of a performance
       metrics archive

SYNOPSIS         top

       pmlogdump [-adehIilLmMrstxzV?]  [-n pmnsfile] [-S starttime] [-T
       endtime] [-Z timezone] archive [metricname ...]
       pmlogdump [-v file]

DESCRIPTION         top

       pmlogdump dumps assorted control, metadata, index and state
       information from the files of a Performance Co-Pilot (PCP)
       archive.  The archive has the base name archive and must have
       been previously created using pmlogger(1).

       Historically, pmlogdump was known as pmdumplog but the latter
       name is not consistent with the other PCP commands that operate
       on PCP archives, so pmlogdump is preferred, however pmdumplog is
       maintained for backwards compatibility.

       Normally pmlogdump operates on the distributed Performance
       Metrics Name Space (PMNS), however if the -n option is specified
       an alternative local PMNS is loaded from the file pmnsfile.

       If any metricname arguments appear, the report will be restricted
       to information relevant to the named performance metrics.  If
       metricname is a non-leaf node in the namespace (see PMNS(5)),
       then pmlogdump will recursively descend the archive's namespace
       and report on all leaf nodes.

       Command line options control the specific information to be

OPTIONS         top

       The available command line options are:

       -a, --all
            Report almost everything, i.e. the flags -d, -i, -L, -m, -s
            and -t.  The optional help text (-h) and label metadata
            strings (-e) are not reported by default.

       -d, --descs
            Display the metadata and descriptions for those performance
            metrics that appear at least once in the archive: see
            pmLookupDesc(3) for more details on the metadata describing

       -e, --labelsets
            Display the label metadata if it is present in the archive.
            See pmLookupLabels(3) for more details on the label metadata
            hierarchy associated with metrics.

       -h, --helptext
            Display metric and instance domain help text if present in
            the archive.  See pmLookupText(3) for more details on the
            help text associated with metrics.

       -i, --insts
            Display the instance domains, and any variations in their
            instance members over the duration of the archive: see
            pmGetInDom(3) for more details on instance domains.

       -I, --on-disk-insts
            Display the on-disk instance domains, which may use a
            different format and encoding than the one visible above the
            Performance Metrics Programming Interface (PMAPI) when using
            pmGetInDom(3) and related routines.  The on-disk format is
            only of interest when investigating the internal structure
            of PCP archives.

       -l, --label
            Dump the archive label, showing the archive format version,
            the time and date for the start and (current) end of the
            archive, and the host from which the performance metrics
            values were collected.

       -L   Like -l, just a little more verbose.

       -m, --metrics
            Print the values for the performance metrics from the
            archive.  This is the default display option.

            Metrics without an instance domain are reported as:
              [timestamp] metric-id (metric-name): value1 value2

            Metrics with an instance domain are reported as:
              [timestamp] metric-id (metric-name):
                  inst [internal-id or "external-id"] value1 value2

            The timestamp is only reported for the first metric in a
            group of metrics sharing the same timestamp.

       -M, --markrecs
            If no metricname is specified then <mark> records are
            reported when they are found in the archive.  If metricname
            arguments are specified, then <mark> records are not
            reported by default.  The -M option forces <mark> records to
            be reported, even when metricname arguments are specified.

            <mark> records are inserted into a PCP archive by
            pmlogger(1), pmlogextract(1), and similar tools to indicate
            a temporal discontinuity in the time-series of metric

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

       -r, --reverse
            Process the archive in reverse order, from most recent to
            oldest recorded metric values.

       -s, --sizes
            Report the size in bytes of each physical record in the

       -S starttime, --start=starttime
            When using the -m option, the report will be restricted to
            those records logged at or after starttime.  Refer to
            PCPIntro(1) for a complete description of the syntax for

       -t   Dump the temporal index that is used to provide accelerated
            access to large archive files.

            The integrity of the index will also be checked.  If the
            index is found to be corrupted, the ``*.index'' file can be
            renamed or removed and the archive will still be accessible,
            however retrievals may take longer without the index.  Note
            however that a corrupted temporal index is usually
            indicative of a deeper malaise that may infect all files in
            a PCP archive.

       -T endtime, --finish=endtime
            When using the -m option, the report will be restricted to
            those records logged before or at endtime.  Refer to
            PCPIntro(1) for a complete description of the syntax for

       -v file
            Verbose mode.  Dump the records from a physical archive file
            in hexadecimal format.  In this case file is the name of a
            single file, usually a basename (as would otherwise appear
            as the archive command line argument), concatenated with
            ``.'' followed by one of meta (the metadata), index (the
            temporal index), or a digit (one of the volumes of metric

            Use of -v precludes the use of all other options and

       -V, --version
            Display version number and exit.

       -x   Extended timestamp reporting format that includes the day of
            the week, day of the month, month and year in addition to
            the (default) hours, minutes and seconds time.  This is
            useful for archives that span multiple days.

            A second -x option will also report the timestamp as an
            offset from the start of the archive in units of seconds.
            This is useful in conjunction with debug diagnostics from
            the archive handling routines in libpcp.

            A third -x option will also report the timestamp in
            ``Epoch'' format (seconds since 1970-01-01 00:00:00 UTC).

       -z, --hostzone
            Change the timezone to the local timezone at the host that
            is the source of the performance metrics, as specified in
            the label record of the archive.

       -Z timezone, --timezone=timezone
            By default, pmlogdump reports the time of day according to
            the local timezone on the system where pmlogdump is run.
            The -Z option changes the timezone to timezone in the format
            of the environment variable TZ as described in environ(7).

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

FILES         top

            Default directory for PCP archives containing performance
            metric values collected from the host hostname.


       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

       PCPIntro(1), pmlogcheck(1), pmlogger(1), pmlogger_check(1),
       pmlogger_daily(1), pmloglabel(1), pmlogextract(1), PMAPI(3),
       pmGetInDom(3), pmLookupDesc(3), pcp.conf(5), pcp.env(5) and

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                      PMLOGDUMP(1)

Pages that refer to this page: pcp-ss(1)pmie(1)pminfo(1)pmlc(1)pmlogcheck(1)pmlogextract(1)pmlogger(1)pmlogreduce(1)pmlogrewrite(1)pmlogsize(1)pmprobe(1)pmrep(1)pmval(1)pmnewcontext(3)LOGARCHIVE(5)