Provided by: pcp_6.3.0-1_amd64 
NAME
pmlogsummary - calculate averages of metrics stored in a set of PCP archives
SYNOPSIS
pmlogsummary [-abfFHiIlmMNsvVxyz?] [-B nbins] [-n pmnsfile] [-p precision] [-S starttime]
[-T endtime] [-Z timezone] archive [metricname ...]
DESCRIPTION
pmlogsummary prints statistical information about metrics of numeric type contained within
the files of a set of Performance Co-Pilot (PCP) archives. The default output prints time
averages for both counter and non-counter metrics. The set of archives 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 archives 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 evaluated.
OPTIONS
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 averaging.
-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 reported).
-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 applications.
-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) format.
-H, --header
Print a one-line header at the start showing what each field represents.
-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 archive 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 (default).
-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 fetches.
-V, --version
Display version number and exit.
-x Print stochastic averages instead of the default (time averages).
-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.
-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
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 follows:
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
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
$ pmlogsummary -aN -p 1 -B 3 surf network.interface.out.bytes
Log Label (Log Format Version 1)
Performance metrics from host www.sgi.com
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 │
└──────────────┴───────────────────────────────────────────┘
FILES
$PCP_VAR_DIR/pmns/*
default PMNS specification files
$PCP_LOG_DIR/pmlogger/<hostname>
Default directory for PCP archives containing performance metric values collected
from the host <hostname>.
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
PCPIntro(1), pmchart(1), pmdumptext(1), pmlogextract(1), pmlogger(1), pmrep(1), pmval(1),
PMAPI(3), pmUnitsStr(3) and PMNS(5).