Date: Tue, 22 Jul 2003 11:55:27 -0700 From: Sean Chittenden <sean@chittenden.org> To: Christopher Weimann <cweimann@k12hq.com> Cc: Paul Pathiakis <paul@pathiakis.com> Subject: Re: Tuning for PostGreSQL Database Message-ID: <20030722185527.GU64860@perrin.int.nxad.com> In-Reply-To: <20030722143449.B10666@smtp.k12us.com> References: <200307191818.13516.paul@pathiakis.com> <20030720110939.GN24507@perrin.int.nxad.com> <20030720164237.GC55392@nasby.net> <20030720205339.GP24507@perrin.int.nxad.com> <20030722143449.B10666@smtp.k12us.com>
next in thread | previous in thread | raw e-mail | index | archive | help
> > 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
--
Sean Chittenden
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20030722185527.GU64860>