Tuning for PostGreSQL Database

Christopher Weimann cweimann at k12hq.com
Tue Jul 22 13:56:51 PDT 2003

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...


More information about the freebsd-performance mailing list