Date: Tue, 22 Jul 2003 15:19:33 -0400 From: Michael Conlen <meconlen@obfuscated.net> To: Sean Chittenden <sean@chittenden.org> Cc: Paul Pathiakis <paul@pathiakis.com> Subject: Re: Tuning for PostGreSQL Database Message-ID: <3F1D8E45.7090101@obfuscated.net> In-Reply-To: <20030722185527.GU64860@perrin.int.nxad.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> <20030722185527.GU64860@perrin.int.nxad.com>
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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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