man Sys::Statistics::Linux::Compilation (3): Statistics compilation.

SYNOPSIS

use Sys::Statistics::Linux;
my $lxs = Sys::Statistics::Linux->new( loadavg => 1 );
my $stat = $lxs->get;
foreach my $key ($stat->loadavg) {
print $key, " ", $stat->loadavg($key), "\n";
}
# or
use Sys::Statistics::Linux::LoadAVG;
use Sys::Statistics::Linux::Compilation;
my $lxs = Sys::Statistics::Linux::LoadAVG->new();
my $load = $lxs->get;
my $stat = Sys::Statistics::Linux::Compilation->new({ loadavg => $load });
foreach my $key ($stat->loadavg) {
print $key, " ", $stat->loadavg($key), "\n";
}
# or
foreach my $key ($stat->loadavg) {
print $key, " ", $stat->loadavg->{$key}, "\n";
}

DESCRIPTION

This module provides different methods to access and filter the statistics compilation.

METHODS

new()

Create a new "Sys::Statistics::Linux::Compilation" object. This creator is only useful if you don't call "get()" of "Sys::Statistics::Linux". You can create a new object with:

    my $lxs  = Sys::Statistics::Linux::LoadAVG->new();
    my $load = $lxs->get;
    my $stat = Sys::Statistics::Linux::Compilation->new({ loadavg => $load });

Statistic methods

sysinfo()
cpustats()
procstats()
memstats()
pgswstats()
netstats()
netinfo(): "netinfo()" provides raw data - no deltas.
sockstats()
diskstats()
diskusage()
loadavg()
filestats()
processes()

All methods returns the statistics as a hash reference in scalar context. In list all methods returns the first level keys of the statistics. Example:

    my $net  = $stat->netstats;                 # netstats as a hash reference
    my @dev  = $stat->netstats;                 # the devices eth0, eth1, ...
    my $eth0 = $stat->netstats('eth0');         # eth0 statistics as a hash reference
    my @keys = $stat->netstats('eth0');         # the statistic keys
    my @vals = $stat->netstats('eth0', @keys);  # the values for the passed device and @keys
    my $val  = $stat->netstats('eth0', $key);   # the value for the passed device and key

Sorted ...

    my @dev  = sort $stat->netstats;
    my @keys = sort $stat->netstats('eth0');

pstop()

This method is looking for top processes and returns a sorted list of PIDs as an array or array reference depending on the context. It expected two values: a key name and the number of top processes to return.

As example you want to get the top 5 processes with the highest cpu usage:

    my @top5 = $stat->pstop( ttime => 5 );
    # or as a reference
    my $top5 = $stat->pstop( ttime => 5 );

If you want to get all processes:

    my @top_all = $stat->pstop( ttime => $FALSE );
    # or just
    my @top_all = $stat->pstop( 'ttime' );

search(), psfind()

Both methods provides a simple scan engine to find special statistics. Both methods except a filter as a hash reference. It's possible to pass the statistics as second argument if the data is not stored in the object.

The method "search()" scans for statistics and rebuilds the hash tree until that keys that matched your filter and returns the hits as a hash reference.

    my $hits = $stat->search({
        processes => {
            cmd   => qr/\[su\]/,
            owner => qr/root/
        },
        cpustats => {
            idle   => 'lt:10',
            iowait => 'gt:10'
        },
        diskusage => {
            '/dev/sda1' => {
                usageper => 'gt:80'
            }
        }
    });

This would return the following matches:

    * processes with the command "[su]"
    * processes with the owner "root"
    * all cpu where "idle" is less than 50
    * all cpu where "iowait" is grather than 10
    * only disk '/dev/sda1' if "usageper" is grather than 80

The method "psfind()" scans for processes only and returns a array reference with all process IDs that matched the filter. Example:

    my $pids = $stat->psfind({ cmd => qr/init/, owner => 'eq:apache' });

This would return the following process ids:

    * processes that matched the command "init"
    * processes with the owner "apache"

There are different match operators available:

    gt  -  grather than
    lt  -  less than
    eq  -  is equal
    ne  -  is not equal

Notation examples:

    gt:50
    lt:50
    eq:50
    ne:50

Both argumnents have to be set as a hash reference.

Note: the operators < > = ! are not available any more. It's possible that in further releases could be different changes for "search()" and "psfind()". So please take a look to the documentation if you use it.

EXPORTS

No exports.

TODOS

   * Are there any wishs from your side? Send me a mail!

REPORTING BUGS

Please report all bugs to <jschulz.cpan(at)bloonix.de>.

AUTHOR

Jonny Schulz <jschulz.cpan(at)bloonix.de>.

Thanks to Moritz Lenz for his suggestion for the name of this module.

COPYRIGHT

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