NAME

       Sys::Statistics::Linux::PgSwStats - Collect linux paging and swapping statistics.

SYNOPSIS

           use Sys::Statistics::Linux::PgSwStats;

           my $lxs = Sys::Statistics::Linux::PgSwStats->new;
           $lxs->init;
           sleep 1;
           my $stat = $lxs->get;

       Or

           my $lxs = Sys::Statistics::Linux::PgSwStats->new(initfile => $file);
           $lxs->init;
           my $stat = $lxs->get;

DESCRIPTION

       Sys::Statistics::Linux::PgSwStats gathers paging and swapping statistics from the virtual
       /proc filesystem (procfs).

       For more information read the documentation of the front-end module
       Sys::Statistics::Linux.

PAGING AND SWAPPING STATISTICS

       Generated by /proc/stat or /proc/vmstat.

           pgpgin      -  Number of pages the system has paged in from disk per second.
           pgpgout     -  Number of pages the system has paged out to disk per second.
           pswpin      -  Number of pages the system has swapped in from disk per second.
           pswpout     -  Number of pages the system has swapped out to disk per second.

           The following statistics are only available by kernels from 2.6.

           pgfault     -  Number of page faults the system has made per second (minor + major).
           pgmajfault  -  Number of major faults per second the system required loading a memory page from disk.

METHODS

   new()
       Call "new()" to create a new object.

           my $lxs = Sys::Statistics::Linux::PgSwStats->new;

       Maybe you want to store/load the initial statistics to/from a file:

           my $lxs = Sys::Statistics::Linux::PgSwStats->new(initfile => '/tmp/pgswstats.yml');

       If you set "initfile" it's not necessary to call sleep before "get()".

       It's also possible to set the path to the proc filesystem.

            Sys::Statistics::Linux::PgSwStats->new(
               files => {
                   # This is the default
                   path   => '/proc',
                   stat   => 'stat',
                   vmstat => 'vmstat',
               }
           );

   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 $stat = $lxs->get;

   raw()
       Get raw values.

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.