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	from meconlen@obfuscated.net on Tue, Jul 22, 2003 at 03:19:33PM -0400
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Subject: Re: Tuning for PostGreSQL Database
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On Tue 07/22/2003-03:19:33PM -0400, Michael Conlen wrote:
> 
> >>From loader(8):
> >
> >     kern.maxbcache
> >                   Limits the amount of KVM reserved for use by the buffer
> >                   cache, specified in bytes.  The default maximum is 200MB.
> >                   This parameter is used to prevent the buffer cache from
> >                   eating too much KVM in large-memory machine configurations.
> >                   Only mess around with this parameter if you need to greatly
> >                   extend the KVM reservation for other resources such as the
> >                   swap zone or NMBCLUSTERS.  Note that the NBUF parameter
> >                   will override this limit.  Modifies VM_BCACHE_SIZE_MAX.
> >
> 
> Aren't we talking about two different things here, the buffer cache and 
> the inactive pages?
> 

I think this article clarifies it somewhat but it is a bit old...

http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=utf-8&selm=199907290910.CAA06665%40implode.root.com