механизм вывода для показателей производительности (inference engine for performance metrics)
Описание (Description)
pmie accepts a collection of arithmetic, logical, and rule
expressions to be evaluated at specified frequencies. The base
data for the expressions consists of performance metrics values
delivered in real-time from any host running the Performance
Metrics Collection Daemon (PMCD), or using historical data from
Performance Co-Pilot (PCP) archive logs.
As well as computing arithmetic and logical values, pmie can
execute actions (popup alarms, write system log messages, and
launch programs) in response to specified conditions. Such
actions are extremely useful in detecting, monitoring and
correcting performance related problems.
The expressions to be evaluated are read from configuration files
specified by one or more filename arguments. In the absence of
any filename, expressions are read from standard input.
Output from pmie is directed to standard output and standard
error as follows:
stdout
Expression values printed in the verbose -v mode and the
output of print actions.
stderr
Error and warning messages for any syntactic or semantic
problems during expression parsing, and any semantic or
performance metrics availability problems during expression
evaluation.
