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PMLOGDUMP(1) General Commands Manual PMLOGDUMP(1)


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


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


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). Alternatively archive is the name of a directory that contains a set of PCP archives than could be opened with pmNewContext(3).

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 reported.


The available command line options are:

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.
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 metrics. Metrics are reported in ascending Performance Metric Identifier (PMID) sequence.
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.
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.
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. Instance domains are reported in ascending Instance Domain Identifier sequence and then ascending time for each set of oserved instance members within an instance domain.
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.
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.
Like -l, just a little more verbose.
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.

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 values.

Load an alternative Performance Metrics Name Space (PMNS(5)) from the file pmnsfile.
Process the archive in reverse order, from most recent to oldest recorded metric values.
Report the size in bytes of each physical record in the archive.
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 starttime.
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.

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 endtime.
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 values).

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

Display version number and exit.
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).

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.
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.


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).


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

PCP Performance Co-Pilot