рассчитывать средние значения показателей, хранящихся в наборе архивов PCP (calculate averages of metrics stored in a set of PCP archives)
Имя (Name)
pmlogsummary - calculate averages of metrics stored in a set of
PCP archives
Синопсис (Synopsis)
pmlogsummary [-abfFHiIlmMNsvVxyz?] [-B nbins] [-n pmnsfile] [-p
precision] [-S starttime] [-T endtime] [-Z timezone] archive
[metricname ...]
Описание (Description)
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 evaluated.
Параметры (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 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 (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 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.
Формат вывода (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).
Примечание (Note)
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 (*).
Примеры (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 │
└──────────────┴───────────────────────────────────────────┘
Файлы (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>.
Окружение PCP (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).
Смотри также (See also)
PCPIntro(1), pmchart(1), pmdumptext(1), pmlogextract(1),
pmlogger(1), pmrep(1), pmval(1), PMAPI(3), pmUnitsStr(3) and
PMNS(5).
