Date: Mon, 12 Feb 2007 10:17:24 -0500 From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> To: Cy Schubert <Cy.Schubert@komquats.com> Cc: freebsd-questions@freebsd.org Subject: Re: Tuning Question Message-ID: <44odnziewr.fsf@be-well.ilk.org> In-Reply-To: <200702102231.l1AMVKNl007984@cwsys.cwsent.com> (Cy Schubert's message of "Sat\, 10 Feb 2007 14\:31\:20 -0800") References: <200702102231.l1AMVKNl007984@cwsys.cwsent.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Cy Schubert <Cy.Schubert@komquats.com> writes: > I have a question about tuning FreeBSD systems, specifically in regard to > memory. At one time on Solaris systems it was recommended to keep scan rate > below 200 pages per second. (Today it's 300 pages per second, dependent on > the amount of memory, class of system.) Are there any recommendations or > rules of thumb a person can use to determine when a memory upgrade is > required? My machines are only busy during port builds when the scan rate > can vary greatly and the page out rate could reach as high as two pages per > second during brief periods. What kind of memory and paging metrics should > I use on FreeBSD systems? I'm not convinced that such a simple algorithm makes sense these days. If the system is normally pretty quiet, then it is unlikely you'll see any difference from optimizing memory behaviour further. I believe that when top(1) gives memory sizes, they are in bytes rather than pages as the manual indicates. -- Lowell Gilbert, embedded/networking software engineer, Boston area http://be-well.ilk.org/~lowell/
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?44odnziewr.fsf>