Re: Tuning for PostGreSQL Database

From: Michael Conlen (meconlen_at_obfuscated.net)
Date: 07/22/03

  • Next message: David Miller: "Re: Tuning for PostGreSQL Database" 
    Date: Tue, 22 Jul 2003 15:19:33 -0400
To: Sean Chittenden <sean@chittenden.org>

    Sean Chittenden wrote:

    >>>You might want to get in the habit of using sysctl for getting
    >>>that kind of info. `sysctl -d vfs.bufspace`
    >>>
    >>>
    >>I'm confused. Everything I have ever read about FreeBSD indicates
    >>that it uses all free ram for the disk cache.
    >>
    >>
    >
    >>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.
    >
    >-sc
    >
    >

    Aren't we talking about two different things here, the buffer cache and
    the inactive pages? 

    --
Michael Conlen
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  • Next message: David Miller: "Re: Tuning for PostGreSQL Database"

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