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sys::statistics::linux::memstats(3pm) [debian man page]

Sys::Statistics::Linux::MemStats(3pm)			User Contributed Perl Documentation		     Sys::Statistics::Linux::MemStats(3pm)

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;

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

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

   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

       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.

perl v5.14.2							    2012-03-09				     Sys::Statistics::Linux::MemStats(3pm)

Check Out this Related Man Page

Sys::Statistics::Linux::PgSwStats(3pm)			User Contributed Perl Documentation		    Sys::Statistics::Linux::PgSwStats(3pm)

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.

perl v5.14.2							    2012-03-09				    Sys::Statistics::Linux::PgSwStats(3pm)
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