Re: Tuning for PostGreSQL Database

From: Christopher Weimann (cweimann_at_k12hq.com)
Date: 07/22/03

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    Date: Tue, 22 Jul 2003 16:56:47 -0400
To: Michael Conlen <meconlen@obfuscated.net>

    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

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