pmevent - Online in the Cloud

PROGRAM:

NAME

pmevent - report event record details

SYNOPSIS

pmevent [-gLz] [-a archive] [-h host] [-K spec] [-O offset] [-p port] [-S starttime] [-s
samples] [-T endtime] [-t interval] [-x pattern] [-Z timezone] metricname ...

DESCRIPTION

Performance Co-Pilot (PCP) supports event records within the framework for fetching
general performance information. pmevent prints current or archived values for the
nominated event record metrics. The event records of interest are contained in one or
more of the metrics identified by the metricname arguments.

Unless directed to another host by the -h option, or to an archive by the -a option or to
a local context by the -L option, pmevent will contact the Performance Metrics Collector
Daemon (PMCD) on the local host to obtain the required information. The -a,-h and -L
options are mutually exclusive.

The metricname arguments may be given in the metric specification syntax, as described in
PCPIntro(1), where the source and metric name may all be included in the metricname, e.g.
thathost:someagent.event.records or myarchive/someagent.event.records['foo-instance','bar-
instance']. When this format is used, any of the -h or -a or -L options may also be
specified, provided the usage is consistent in terms of the source of the metrics
identified by the options as compared to any explicit source of the metrics defined in the
metricname arguments.

When using the metric specification syntax, the ``hostname'' @ is treated specially and
causes pmevent to use a local context to collect metrics from PMDAs on the local host
without PMCD (same as the -L option). Only some metrics are available in this mode.

The -S, -T and -O options may be used to define a time window to restrict the samples
retrieved, set an initial origin within the time window; refer to PCPIntro(1) for a
complete description of these options.

When processing an archive, pmevent may relinquish its own timing control, and operate as
a ``slave'' of a pmtime(1) process that uses a GUI dialog to provide timing control. In
this case, either the -g option should be used to start pmevent as the sole slave of a new
pmtime(1) instance, or -p should be used to attach pmevent to an existing pmtime(1)
instance via the IPC channel identified by the port argument.

The other options that control the information reported by pmevent are as follows:

-a Performance metric values are retrieved from the PCP archive log file identified by
the base name archive.

-g Start pmevent as the slave of a new pmtime(1) process for replay of archived
performance data using the pmtime(1) graphical user interface.

-h Current performance metric values are retrieved from the nominated host machine.

-K When fetching metrics from a local context, the -K option may be used to control the
DSO PMDAs that should be made accessible. The spec argument conforms to the syntax
described in __pmSpecLocalPMDA(3). More than one -K option may be used.

-L Causes pmevent to use a local context to collect metrics from PMDAs on the local host
without PMCD. Only some metrics are available in this mode.

-p Attach pmevent to an existing pmtime(1) time control process instance via the IPC
channel identified by the port argument. This option is normally only used by other
tools, e.g. pmchart(1), when they launch pmevent with synchronized time control.

-s The argument samples defines the number of samples to be retrieved and reported. If
samples is 0 or -s is not specified, pmevent will sample and report continuously (in
real time mode) or until the end of the PCP archive (in archive mode).

It is not possible to control the number of event records, as each value of a
metricname may deliver zero, one or more event records. The -s option determines how
many times pmevent will retrieve values for the specified metricname metrics.

-t The default sampling interval may be set to something other than the default 1
second. The interval argument follows the syntax described in PCPIntro(1), and in
the simplest form may be an unsigned integer (the implied units in this case are
seconds).

For PCP archives, pmevent will retrieve all of the event records for the metricname
metrics within the requested time window, so the value of the sampling interval will
have no effect in this case.

-x The given filter is sent to the performance metric domain agent for the requested
metricname before any values are requested. This serves two purposes. Firstly, it
provides a mechanism for server-side event filtering that is customisable for
individual event streams. In addition, some performance metrics domain agents also
use the PMCD store mechanism to provide a basic security model (e.g. for sensitive
log files, only a client host with pmStore(3) access would be able to access the
event stream).

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

-z Change the reporting timezone to the local timezone at the host that is the source of
the performance metrics, as identified via either the metricname or the -h or -a or
-L options.

The output from pmevent is directed to standard output.

Use pmevent online using onworks.net services