[589] in bugtraq
Re: question about /usr/etc/chill
daemon@ATHENA.MIT.EDU (Pete Shipley)
Fri Jan 6 03:03:41 1995
To: gj@canarie.ca (G.J.W. Hagenaars)
Cc: bugtraq@fc.net
In-Reply-To: Your message of Thu, 05 Jan 1995 13:20:33 -0500.
<9501051820.AA07343@tweetie.canarie.ca>
Date: Thu, 05 Jan 1995 22:56:51 -0800
From: Pete Shipley <shipley@merde.dis.org>
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Content-ID: <27859.789375410.1@merde.dis.org>
>Question about
>
>-rwxr-sr-x 1 root kmem 16384 Oct 13 1993 /usr/etc/chill*
>
>why is it setgid kmem, and why is there no man page on it?
Here is the man page...
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Content-Description: chill.8
CHILL(8) MAINTENANCE COMMANDS CHILL(8)
NAME
chill - remove useful pages from the virtual memory cache
SYNOPSIS
chill [ -c cycles ] [ -f factor ] [ -m memsize ]
DESCRIPTION
chill is a command designed to cool off the system by remov-
ing any useful (to a process) pages from the virtual memory
cache. chill does this by creating a large pool of private
pages, and then cycling through the pool, dirtying every
page. Currently, this forces chill's pages to be hot, which
forces out all the other (non-locked) pages in the system.
Then when chill exits, all its private pages are put on the
free list, leaving no useful pages in memory.
With no options specified, the size of the pool created by
chill is twice the amount of pageable memory, and it is
cycled through just once. This seems to give correct
results with minimal overhead.
However, the size of the pool may be explicitly specified as
memsize, or as factor times the amount of pageable memory.
memsize overrides the factor specification. The cycle count
may be specified as cycles.
OPTIONS
-c cycles
Set the cycle count to cycles. The default is 1.
-f factor
Set the expansion factor to factor. The default is 2.
-m memsize
Set the memory size to memsize. The default is
unspecified, which means that factor times the amount
of pageable memory will be used.
BUGS
chill is dependent on implementation details which are sub-
ject to change.
Sun Release 4.1 Last change: 06 April 1988 1
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