Date: Thu, 17 Jan 2008 16:48:14 -0500 From: Bill Moran <wmoran@potentialtech.com> To: robert@webtent.com Cc: Robert Fitzpatrick <lists@webtent.net>, Ivan Voras <ivoras@freebsd.org>, freebsd-questions@freebsd.org Subject: Re: db performance Message-ID: <20080117164814.e1c7a086.wmoran@potentialtech.com> In-Reply-To: <1200605937.7281.79.camel@columbus.webtent.org> References: <1200602606.7281.48.camel@columbus.webtent.org> <fmogoe$mbc$1@ger.gmane.org> <1200605937.7281.79.camel@columbus.webtent.org>
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In response to Robert Fitzpatrick <lists@webtent.net>: > On Thu, 2008-01-17 at 22:19 +0100, Ivan Voras wrote: > > Robert Fitzpatrick wrote: > > > > > real memory = 3220635648 (3071 MB) > > > avail memory = 3150565376 (3004 MB) > > > > > > we have 3GB of RAM available with actually 4GB physical RAM installed? > > > > If you're using a 32-bit (i386) kernel you need PAE. Or switch to 64-bit > > (amd64). > > Yes, this is something else I've found I need to do to these i386 > servers since we upgraded the memory, I guess I'll get PAE in the kernel > and switch the RAID, should provide quite a difference, yes? Some people > have suggested the PAE drivers may not be stable with my hardware. I don't recommend PAE simply because amd64 works so well and PAE is a holdover hack. That being said, if your hardware is i386 only, you're stuck with PAE. -- Bill Moran http://www.potentialtech.com
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