NAME

Beekeeper::Service::Supervisor::Worker - Worker pool supervisor

VERSION

Version 0.09

DESCRIPTION

A Supervisor worker is created automatically in every worker pool.

It keeps a shared table of the performance metrics of every worker connected to every broker, and routinely measures the CPU and memory usage of local workers.

These metrics can be queried using the methods provided by Beekeeper::Service::Supervisor or using the command line client bkpr-top.

Measured performance metrics

nps

Number of received notifications per second.

cps

Number of processed calls per second.

err

Number of errors per second generated while handling calls or notifications.

mem

Resident non shared memory size in KiB. This is roughly equivalent to the value of RES minus SHR displayed by top.

cpu

Percentage of CPU load (100 indicates a full utilization of one core thread).

load

Percentage of busy time (100 indicates no idle time).

Note that workers can have a high load with very little CPU usage when being blocked by synchronous operations (like slow SQL queries, for example).

Due to inaccuracies of measurement the actual maximum may be slightly below 100.

SEE ALSO

Beekeeper::Service::Supervisor, which is the interface to the RPC methods exposed by this worker class.

AUTHOR

José Micó, jose.mico@gmail.com

COPYRIGHT AND LICENSE

Copyright 2015-2021 José Micó.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language itself.

This software is distributed in the hope that it will be useful, but it is provided “as is” and without any express or implied warranties. For details, see the full text of the license in the file LICENSE.