NAME
Sys::Statistics::Linux::PgSwStats - Collect linux paging and swapping statistics.
SYNOPSIS
use Sys::Statistics::Linux::PgSwStats;
my $lxs = new Sys::Statistics::Linux::PgSwStats;
$lxs->init;
sleep 1;
my $stats = $lxs->get;DESCRIPTION
This module collects statistics by the virtual /proc filesystem (procfs) and is developed on default vanilla kernels. It is tested on x86 hardware with the distributions SuSE (SuSE on s390 and s390x architecture as well), Red Hat, Debian, Asianux, Slackware and Mandrake on kernel versions 2.4 and 2.6 and should run on all linux kernels with a default vanilla kernel as well. It is possible that this module doesn't run on all distributions if the procfs is too much changed.
Further it is necessary to run it as a user with the authorization to read the /proc filesystem.
DELTAS
It's necessary to initialize the statistics by calling init(), because the statistics are deltas between the call of init() and get(). By calling get() the deltas be generated and the initial values be updated automatically. This way making it possible that the call of init() is only necessary after the call of new(). Further it's recommended to sleep for a while - at least one second - between the call of init() and/or get() if you want to get useful statistics.
PAGING AND SWAPPING STATISTICS
Generated by /proc/stat or /proc/vmstat.
pgpgin - Number of kilobytes the system has paged in from disk.
pgpgout - Number of kilobytes the system has paged out to disk.
pswpin - Number of kilobytes the system has swapped in from disk.
pswpout - Number of kilobytes the system has swapped out to disk.METHODS
new()
Call new() to create a new object.
my $lxs = new Sys::Statistics::Linux::PgSwStats;init()
Call init() to initialize the statistics.
$lxs->init;get()
Call get() to get the statistics. get() returns the statistics as a hash reference.
my $stats = $lxs->get;EXPORTS
No exports.
SEE ALSO
proc(5)
REPORTING BUGS
Please report all bugs to <jschulz.cpan(at)bloonix.de>.
AUTHOR
Jonny Schulz <jschulz.cpan(at)bloonix.de>.
COPYRIGHT
Copyright (c) 2006, 2007 by Jonny Schulz. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.