pmlogsummary(1) — Linux manual page


PMLOGSUMMARY(1)            General Commands Manual           PMLOGSUMMARY(1)

NAME         top

       pmlogsummary  -  calculate averages of metrics stored in a set of PCP

SYNOPSIS         top

       pmlogsummary [-abfFHiIlmMNsvVxyz?]  [-B nbins] [-n pmnsfile] [-p
       precision] [-S starttime] [-T endtime] [-Z timezone] archive
       [metricname ...]

DESCRIPTION         top

       pmlogsummary prints statistical information about metrics of numeric
       type contained within the files of a set of Performance Co-Pilot
       (PCP) archive logs.  The default output prints time averages for both
       counter and non-counter metrics.  The set of archive logs is
       identified by archive, which is a comma-separated list of names, each
       of which may be the base name of an archive or the name of a
       directory containing one or more archives.  The archive logs are
       typically created using pmlogger(1).

       The metrics of interest are named in the metricname arguments.  If
       metricname is a non-leaf node in the Performance Metrics Name Space
       (PMNS(5)), then pmlogsummary will recursively descend the PMNS and
       report on all leaf nodes.  If no metricname argument is given, the
       root of the namespace is used.

       Metrics with counter semantics are converted to rates before being

OPTIONS         top

       The available command line options are:

       -a, --all
            Print all information.  This is equivalent to -blmMy.

       -b   Print both forms of averaging, that is both stochastic and time

       -B nbins, --bins=nbins
            Print the approximate distribution of values, using histogram
            bins such that the value range (minimum - maximum) for each
            metric is divided equally into nbins bins, and each bin
            accumulates the frequency of observed values in the
            corresponding range.  Refer to the ``OUTPUT FORMAT'' section
            below for a description of how the distribution of values is

       -f   Spreadsheet format - the tab character is used to delimit each
            field printed.  This option is intended to allow pmlogsummary
            output to be imported directly into common spreadsheet

       -F   Spreadsheet format - the comma character is used to delimit each
            field printed.  This option is intended to allow pmlogsummary
            output to be imported directly into common spreadsheet
            applications which support the Comma Separated Value (.csv)

       -H, --header
            Print a one-line header at the start showing what each field

       -i, --mintime
            Also print the time at which the minimum value was logged.  The
            format of this timestamp is described in the ``OUTPUT FORMAT''
            section below.

       -I, --maxtime
            Also print the time at which the maximum value was logged.  The
            format of this timestamp is described in the ``OUTPUT FORMAT''
            section below.

       -l, --label
            Also print the archive label, showing the log format version,
            the time and date for the start and end of the archive time
            window, and the host from which the performance metrics values
            were collected.

       -m, --minimum
            Also print the minimum logged value for each metric.

       -M, --maximum
            Also print the maximum logged value for each metric.

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

       -N   Suppress any warnings resulting from individual archive fetches

       -p precision, --precision=precision
            Print all floating point numbers with precision digits after the
            decimal place.

       -s, --sum
            Print (only) the sum of all logged values for each metric.

       -S starttime, --start=starttime
            Set the starttime of the time window.  Refer to PCPIntro(1) for
            a complete description of the syntax for starttime.

       -T endtime, --finish=endtime
            Set the endtime of the time window.  Refer to PCPIntro(1) for a
            complete description of the syntax for endtime.

       -v, --verbose
            Report (verbosely) on warnings resulting from individual archive

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

       -x   Print stochastic averages instead of the default (time

       -y, --samples
            Also print the number of samples encountered in the set of
            archives for each metric.

       -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 log.

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

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

OUTPUT FORMAT         top

       The pmlogsummary output format is spartan as it is intended to be
       post-processed with standard tools.  This means that there is no
       annotation associated with each output field which would make
       processing harder.  The intention is that pmlogsummary output be
       massaged into a format which can be used by a spreadsheet program, is
       suitable for inclusion in a web page, or whatever.

       For each metric, pmlogsummary produces a single output line as

          metricname  value(s) units

       For metrics with multiple instances, pmlogsummary produces multiple
       lines of output as follows:

          metricname ["instance 1"] value(s) units
          metricname ["instance 2"] value(s) units
          metricname ["instance N"] value(s) units

       The printed value(s) for each metric always follow this order:
       stochastic average, time average, minimum, minimum timestamp,
       maximum, maximum timestamp, count, [bin 1 range], bin 1 count, ...
       [bin nbins range], bin nbins count.  The individual values for each
       metric are space-separated (unless the -f option is used).

       All counter metrics which are measured in units of time will be
       converted to seconds before being rate converted and used in the
       pmlogsummary calculations.  The values calculated for these metrics
       are also printed in seconds.

       The units will be displayed in the format described by pmUnitsStr(3).

       Given either of the -i or -I options, pmlogsummary produces two
       different timestamp formats, depending on the interval over which it
       is run.  For an interval greater than 24 hours, the date is displayed
       in addition to the time at which the maxima and/or minima occurred.
       If the extent of the data being checked is less than 24 hours, a more
       precise format is used (time is displayed with millisecond precision,
       but without the date).

NOTES         top

       The average for an individual metric is calculated as follows:

       Non-counter metrics are averaged using stochastic averaging - each
       observation has an equal weighting towards the calculation of the
       average (the sum of all values divided by the total number of values,
       for each metric).

       Counter metrics are averaged using time averaging (by default), but
       the -x option can be used to specify that counters be averaged using
       the stochastic method instead.  When calculating a time average, the
       sum of the product of each sample value multiplied by the time
       difference between each sample, is divided by the total time over
       which that metric was logged.

       Counter metrics whose measurements do not span 90% of the set of
       archives will be printed with the metric name prefixed by an asterisk

EXAMPLES         top

       $ pmlogsummary -aN -p 1 -B 3 surf network.interface.out.bytes
       Log Label (Log Format Version 1)
       Performance metrics from host
         commencing Tue Jan 14 20:50:50.317 1997
         ending     Wed Jan 29 10:13:07.387 1997
       network.interface.out.bytes ["xpi0"] 202831.3 202062.5 20618.7 \
            1235067.7 971 [<=425435.0] 912 [<=830251.4] 42 [<=1235067.7] \
            17 byte / sec
       network.interface.out.bytes ["xpi1"] 0.0 0.0 0.0 0.0 1033 [<=0.0] \
            1033 [] 0 [] 0 byte / sec
       network.interface.out.bytes ["et0"] 0.0 0.0 0.0 0.0 1033 [<=0.0] \
            1033 [] 0 [] 0 byte / sec
       network.interface.out.bytes ["lo0"] 899.0 895.2 142.6 9583.1 1031 \
            [<=3289.4] 1027 [<=6436.2] 3 [<=9583.1] 1 byte / sec

       A description of each field in the first line of statistical output,
       which describes one instance of the network.interface.out.bytes
       metric, follows:

            │    Field     │                  Meaning                  │
            │["xpi0"]      │ instance name                             │
            │202831.3      │ stochastic average                        │
            │202062.5      │ time average                              │
            │20618.7       │ minimum value                             │
            │1235067.7     │ maximum value                             │
            │971           │ total number of values for this instance  │
            │[<=425435.0]  │ range for first bin  (20618.7-425435.0)   │
            │912           │ number of values in first bin             │
            │[<=830251.4]  │ range for second bin  (425435.0-830251.4) │
            │42            │ number of values in second bin            │
            │[<=1235067.7] │ range for third bin  (830251.4-1235067.7) │
            │17            │ number of values in third bin             │
            │byte / sec    │ base units for this metric                │

DIAGNOSTICS         top

       All are generated on standard error and are intended to be self-

FILES         top

            default PMNS specification files

            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 pcp.conf(5).

SEE ALSO         top

       PCPIntro(1), pmchart(1), pmdumptext(1), pmlogextract(1), pmlogger(1),
       pmrep(1), pmval(1), PMAPI(3), pmUnitsStr(3) 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
       2020-11-01.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-10-30.)  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                     PMLOGSUMMARY(1)

Pages that refer to this page: ganglia2pcp(1)pcp2csv(1)pmdiff(1)pmlogcheck(1)pmrep(1)sar2pcp(1)logarchive(5)LOGARCHIVE(5)