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Date:      Sat, 29 May 2004 09:50:08 -0400
From:      Bill Moran <wmoran@potentialtech.com>
To:        Geert Hendrickx <geert.hendrickx@ua.ac.be>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: documentation on sysctl vm.defer_swapspace_pageouts?
Message-ID:  <40B89510.1060304@potentialtech.com>
In-Reply-To: <20040529111710.GA515@lori.mine.nu>
References:  <20040529111710.GA515@lori.mine.nu>

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Geert Hendrickx wrote:
> Hi, 
> 
> where can I find documentation on the vm.defer_swapspace_pageouts
> sysctl?  LINT only mentions it, without explaining, man sysctl doesn't 
> mention it at all, and even Google yields very few useful results...  

All I found in the source was this:
"Give preference to dirty pages in mem"
in src/sys/vm/vm_pageout.c, this is the description available from
sysctl -d

> I was looking for a way to tune swap-usage a bit, I heard Linux has a
> "swappiness" setting (telling the kernel how easy it should go with 
> paging out), and I hoped FreeBSD would have something similar.
> vm.defer_swapspace_pageouts might do the trick, but so it seems to be 
> poorly documented...  

Seems so.  This might be a question better suited for hackers@ ... and
then passed on to doc@ ... I believe there's an effort currently going
on to document all sysctls ...

-- 
Bill Moran
Potential Technologies
http://www.potentialtech.com



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