Date: Thu, 1 Oct 2009 10:43:45 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: Bill Moran <wmoran@potentialtech.com> Cc: Liste FreeBSD <freebsd-questions@freebsd.org> Subject: Re: Swap and memory optimization Message-ID: <20091001154345.GN29215@dan.emsphone.com> In-Reply-To: <20091001073919.9e05d056.wmoran@potentialtech.com> References: <176FD00A-5791-4D3E-B7F3-D5F0A0AE2037@todoo.biz> <20091001073919.9e05d056.wmoran@potentialtech.com>
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In the last episode (Oct 01), Bill Moran said: > bsd <bsd@todoo.biz> wrote: > > I have a FBSD 6.4p7 box that I use as a mail server - 1Go RAM - RAID1 > > Works quite well. > > > > As I plan to put 100 more mail accounts soon on the server I was > > wondering if the memory & swap was ok on the server considering these > > figures: > > > > last pid: 18956; load averages: 0.04, 0.11, 0.05 up 19+08:36:23 09:53:38 > > 125 processes: 1 running, 124 sleeping > > CPU: 0.0% user, 0.0% nice, 1.5% system, 0.4% interrupt, 98.1% idle > > Mem: 499M Active, 70M Inact, 362M Wired, 41M Cache, 111M Buf, 20M Free > > Swap: 2000M Total, 160M Used, 1840M Free, 8% Inuse > > > > Though It looks good to me - the server swaps a bit (between 8 to 14%) > > and there is not much memory left. > > Looks like the server would run more smoothly with a bit more RAM. At > least an additional 256M, I would think, but considering the price of RAM, > you might as well just up it to 2G. The amount of used swap is much less important than whether you are actively swapping (if there are In/Out values on the Swap line in top, or if "vmstat 1" shows nonzero values in the pi/po columns). 160MB of used swap is fine if it's just unused daemons (getty, idle webserver, etc). More memory can never hurt, but it doesn't seem like it's urgently needed here. -- Dan Nelson dnelson@allantgroup.com
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