агент домена сводных показателей производительности (PMDA) (summary performance metrics domain agent (PMDA))
Имя (Name)
pmdasummary - summary performance metrics domain agent (PMDA)
Синопсис (Synopsis)
$PCP_PMDAS_DIR/summary/pmdasummary [-d domain] [-h helpfile] [-l
logfile] [-U username] pmie-command-line
Описание (Description)
pmdasummary is a Performance Metrics Domain Agent (PMDA) which
derives performance metrics values from values made available by
other PMDAs. pmdasummary consists of two processes:
pmie process
The inference engine for performance values pmie(1) is
used to periodically sample values for the base metrics
and compute the derived values. This process is launched
with the given pmie-command-line arguments by the main
process, described below.
main process
The main process reads and buffers the values computed by
pmie(1) and makes them available to the performance
metrics collector daemon pmcd(1).
A brief description of the pmdasummary command line options
follows:
-d It is absolutely crucial that the performance metrics domain
number specified here is unique and consistent. That is,
domain should be different for every PMDA on the one host,
and the same domain number should be used for the same PMDA
on all hosts.
-h This option specifies an alternative help text file helpfile
for describing the metrics that pmdasummary represents.
-l Location of the log file. By default, a log file named
summary.log is written in the current directory of pmcd(1)
when pmdasummary is started, i.e. $PCP_LOG_DIR/pmcd. If
the log file cannot be created or is not writable, output is
written to the standard error instead.
-U User account under which to run the agent. The default is
the unprivileged "pcp" account in current versions of PCP,
but in older versions the superuser account ("root") was
used by default.
Установка (Installation)
If you want access to the names, help text and values for the
summary performance metrics, do the following as root:
# cd $PCP_PMDAS_DIR/summary
# ./Install
If you want to undo the installation, do the following as root:
# cd $PCP_PMDAS_DIR/summary
# ./Remove
pmdasummary is launched by pmcd(1) and should never be executed
directly. The Install and Remove scripts notify pmcd(1) when the
agent is installed or removed.
Файлы (Files)
$PCP_PMCDCONF_PATH
command line options used to launch pmdasummary
$PCP_PMDAS_DIR/summary/expr.pmie
default pmie(1) expressions defining the summary metrics
$PCP_PMDAS_DIR/summary/help
default help text for the summary metrics
$PCP_PMDAS_DIR/summary/Install
installation script for the pmdasummary agent
$PCP_PMDAS_DIR/summary/Remove
undo installation script for the pmdasummary agent
$PCP_LOG_DIR/pmcd/summary.log
default log file for error messages and other information
from pmdasummary
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), pmcd(1) and pmie(1).
