NAME App::derived - run command periodically and calculate rate and check from network SYNOPSIS $ cat CmdsFile slowqueries: mysql -NB -e 'show global status like "Slow_queries%"' $ derived -MMemcahced,port=11211,host=127.0.0.1 CmdsFile $ telnet localhost port get slowqueris VALUE slowqueris 0 3 0.2 # slow queries/sec DESCRIPTION derived runs commands periodically and capture integer value. And calculate per-second rate. You can retrieve these values from integrated memcached-protocol server or pluggable workers. You can monitoring the variation of metrics through this daemon. See detail for perldoc "derived" AUTHOR Masahiro Nagano SEE ALSO LICENSE Copyright (C) Masahiro Nagano This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.