Swap stress test Post: 302791321

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Operating Systems Solaris Swap stress test Post 302791321 by butchie3980 on Monday 8th of April 2013 10:29:11 AM

04-08-2013

Registered User

some more details

here's some more details about what we run into. perhaps we're just not going about it the right way. for starters, we're running solaris 10 u10. installed ram is 128GB. Swap space is 8GB volume.
the idea is to trigger swap usage, and we try to monitor that two ways, using top and "swap -l"
first step that we try is to fill up /tmp with a couple of simple "mkfile 10g /tmp/memeater01" style commands. We can see the available ram decrease each time we create one of those files in /tmp.

we get down to about 10-ish GB of free ram and start to encounter "no space available" errors when trying to create tmp files.

Next think we tried was to push it over the edge using a program that simply uses malloc() calls to reserve ram and hold onto it. we can also watch the avalable ram decrease until the 10GB (roughly) threshold and then this program dies.

A combination of both /tmp files and the malloc() program still dies around the 10gb free threshold and we never ever see any indicators that swap space is being used.

---------- Post updated at 10:29 AM ---------- Previous update was at 10:24 AM ----------

Just downloaded VTS, and started reading the documentation. Tried a test run, but don't know if the defaults are what we need. We only enabled the memory test and ran it. According to top, free RAM dropped to 36GB and stayed there, Free swap stayed the same no changes. We sat there and watched top for about 30 minutes before getting pulled away to a meeting. so we stopped it and decided to try later. are there some parameters we need to set or change?

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glib::flags

Glib::Flags(3)						User Contributed Perl Documentation					    Glib::Flags(3)

NAME

       Glib::Flags

DESCRIPTION

       Glib maps flag and enum values to the nicknames strings provided by the underlying C libraries.	Representing flags this way in Perl is an
       interesting problem, which Glib solves by using some cool overloaded operators.

       The functions described here actually do the work of those overloaded operators.  See the description of the flags operators in the "This
       Is Now That" section of Glib for more info.

HIERARCHY

	 Glib::Flags

METHODS

   scalar = $class->new ($a)
       o   $a (scalar)

       Create a new flags object with given bits.  This is for use from a subclass, it's not possible to create a "Glib::Flags" object as such.
       For example,

	   my $f1 = Glib::ParamFlags->new ('readable');
	   my $f2 = Glib::ParamFlags->new (['readable','writable']);

       An object like this can then be used with the overloaded operators.

   scalar = $a->all ($b, $swap)
       o   $b (scalar)

       o   $swap (scalar)

   ref = $a->as_arrayref
   integer = $a->bool ($b, $swap)
       o   $b (scalar)

       o   $swap (integer)

   integer = $a->eq ($b, $swap)
       o   $b (scalar)

       o   $swap (integer)

   integer = $a->ge ($b, $swap)
       o   $b (scalar)

       o   $swap (integer)

   scalar = $a->intersect ($b, $swap)
       o   $b (scalar)

       o   $swap (scalar)

   integer = $a->ne ($b, $swap)
       o   $b (scalar)

       o   $swap (integer)

   scalar = $a->sub ($b, $swap)
       o   $b (scalar)

       o   $swap (scalar)

   scalar = $a->union ($b, $swap)
       o   $b (scalar)

       o   $swap (scalar)

   scalar = $a->xor ($b, $swap)
       o   $b (scalar)

       o   $swap (scalar)

SEE ALSO

       Glib

COPYRIGHT

       Copyright (C) 2003-2009 by the gtk2-perl team.

       This software is licensed under the LGPL.  See Glib for a full notice.

perl v5.12.1							    2010-07-05							    Glib::Flags(3)