10-23-2018
I regret that I am unable to hack into your servers and my crystal ball is in for servicing. Can you post some meaningful output illustrating why you think you have a problem?
It is usual for Unix/Linux servers of all flavours to keep their memory full, i.e. cached of anything they have used, just in case it can be re-used without having to wait for disk IO. Are you seeing paging space used? The output from lsps -a would show you this sort of thing. It is extreeeeemly unlikely that the two servers will have done exactly the same thing.
The output from vmstat 5 should also have a few columns about paging in & out counts.
If your server is not using paging space, then you don't generally have a memory problem. What is making you concerned?
Thanks, in advance,
Robin
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LEARN ABOUT DEBIAN
sys::statistics::linux::pgswstats
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)