Sys::Statistics::Linux::MemStats.3pm

Langue: en

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Version: 2010-08-13 (ubuntu - 24/10/10)

Section: 3 (Bibliothèques de fonctions)

Sommaire

NAME

Sys::Statistics::Linux::MemStats - Collect linux memory information.

SYNOPSIS

     use Sys::Statistics::Linux::MemStats;
 
     my $lxs  = Sys::Statistics::Linux::MemStats->new;
     my $stat = $lxs->get;

DESCRIPTION

Sys::Statistics::Linux::MemStats gathers memory statistics from the virtual /proc filesystem (procfs).

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

MEMORY INFORMATIONS

Generated by /proc/meminfo. 
     memused         -  Total size of used memory in kilobytes.
     memfree         -  Total size of free memory in kilobytes.
     memusedper      -  Total size of used memory in percent.
     memtotal        -  Total size of memory in kilobytes.
     buffers         -  Total size of buffers used from memory in kilobytes.
     cached          -  Total size of cached memory in kilobytes.
     realfree        -  Total size of memory is real free (memfree + buffers + cached).
     realfreeper     -  Total size of memory is real free in percent of total memory.
     swapused        -  Total size of swap space is used is kilobytes.
     swapfree        -  Total size of swap space is free in kilobytes.
     swapusedper     -  Total size of swap space is used in percent.
     swaptotal       -  Total size of swap space in kilobytes.
     swapcached      -  Memory that once was swapped out, is swapped back in but still also is in the swapfile.
     active          -  Memory that has been used more recently and usually not reclaimed unless absolutely necessary.
     inactive        -  Memory which has been less recently used and is more eligible to be reclaimed for other purposes.
                        On earlier kernels (2.4) Inact_dirty + Inact_laundry + Inact_clean.
 
     The following statistics are only available by kernels from 2.6.
 
     slab            -  Total size of memory in kilobytes that used by kernel for data structure allocations.
     dirty           -  Total size of memory pages in kilobytes that waits to be written back to disk.
     mapped          -  Total size of memory in kilbytes that is mapped by devices or libraries with mmap.
     writeback       -  Total size of memory that was written back to disk.
     committed_as    -  The amount of memory presently allocated on the system.
 
     The following statistic is only available by kernels from 2.6.9.
 
     commitlimit     -  Total amount of memory currently available to be allocated on the system.

METHODS

new()

Call "new()" to create a new object. 
     my $lxs = Sys::Statistics::Linux::MemStats->new;

get()

Call "get()" to get the statistics. "get()" returns the statistics as a hash reference. 
     my $stat = $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 (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.