Date: Wed, 04 Feb 2009 22:54:57 -0700 From: Tim Judd <tajudd@gmail.com> To: Yavuz <maslak@ihlas.net.tr> Cc: freebsd-questions@freebsd.org Subject: Re: is there any way to increase disk performance ? Message-ID: <498A7F31.30206@gmail.com> In-Reply-To: <1E37AE87F15C4E34B6EB1002AADEB87A@desktop2002> References: <1E37AE87F15C4E34B6EB1002AADEB87A@desktop2002>
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Yavuz wrote: > I have freebsd7 (amd64 bit) and sata2 disk 7200 rpm. > > it's running mail server which has services like pop3,imap,smtp and > webmail on this machine. > > When I type systat 1 -vmstat on command line, even I rarely see that > disk usage hits 100%. > I have no problem as ram and cpu. they is enough. > > is there any way to increase disk performance without causing any problem ? > So in one second, the disk hits 100% utilization, weather it's reading or writing data to disk. You said above that "I rarely see" -- so even though, as a server, you're running slow spindles, you are doing pretty good. I've no real experience with a site that's (for example) been slashdotted, to test what is tolerable, and what's not. But as I currently guess, an OVERALL average between 25% to 33% is about as much as I would ever tax a server for CONSISTENT averages. So if you're seeing it rarely, such as when somebody hits webmail and takes 1 second of constant disk read to serve the content, I'd be happy there... I don't think you have a problem, when you put your concern into the broader scope of 1 minute, 1 hour, 1 day or 1 week. It'll be very difficult to never see 100% in 1 second no matter how powerful the machine is. HTH --Tim
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