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Full Discussion: Strange memory behavior
Operating Systems AIX Strange memory behavior Post 302722651 by bakunin on Sunday 28th of October 2012 07:06:14 AM
Old 10-28-2012
Very interesting. Alas, i have no immediate answer, only some observations:

Code:
                34333 pending disk I/Os blocked with no pbuf
                    0 paging space I/Os blocked with no psbuf
                 2228 filesystem I/Os blocked with no fsbuf
                73667 client filesystem I/Os blocked with no fsbuf
               284352 external pager filesystem I/Os blocked with no fsbuf

these numbers look relatively high. If they remain constant the problem was probably somewhere in the past as the numbers are collected since reboot. You might want to watch them closely, though: if you notice a sharp increase chances are your system is I/O-bound somehow.

Code:
              1204754 pinned pages

This is roughly 1GB memory pinned. Do you have a database running on the system? The Oracle SGA, for instance, is mostly pinned memory. "pinned" means "not to be swapped out in case swapping is necessary".
 

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Cache::Memory(3pm)					User Contributed Perl Documentation					Cache::Memory(3pm)

NAME
Cache::Memory - Memory based implementation of the Cache interface SYNOPSIS
use Cache::Memory; my $cache = Cache::Memory->new( namespace => 'MyNamespace', default_expires => '600 sec' ); See Cache for the usage synopsis. DESCRIPTION
The Cache::Memory class implements the Cache interface. This cache stores data on a per-process basis. This is the fastest of the cache implementations, but is memory intensive and data can not be shared between processes. It also does not persist after the process dies. However data will remain in the cache until cleared or it expires. The data will be shared between instances of the cache object, a cache object going out of scope will not destroy the data. CONSTRUCTOR
my $cache = Cache::Memory->new( %options ) The constructor takes cache properties as named arguments, for example: my $cache = Cache::Memory->new( namespace => 'MyNamespace', default_expires => '600 sec' ); See 'PROPERTIES' below and in the Cache documentation for a list of all available properties that can be set. METHODS
See 'Cache' for the API documentation. PROPERTIES
Cache::Memory adds the property 'namespace', which allows you to specify a different caching store area to use from the default. All methods will work ONLY on the namespace specified. my $ns = $c->namespace(); $c->set_namespace( $namespace ); For additional properties, see the 'Cache' documentation. SEE ALSO
Cache AUTHOR
Chris Leishman <chris@leishman.org> Based on work by DeWitt Clinton <dewitt@unto.net> COPYRIGHT
Copyright (C) 2003-2006 Chris Leishman. All Rights Reserved. This module is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either expressed or implied. This program is free software; you can redistribute or modify it under the same terms as Perl itself. $Id: Memory.pm,v 1.9 2006/01/31 15:23:58 caleishm Exp $ perl v5.12.4 2011-08-05 Cache::Memory(3pm)
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