Date: Fri, 16 Jul 1999 13:15:35 -0600 (MDT) From: "Kenneth D. Merry" <ken@plutotech.com> To: support@idiom.com (David Muir Sharnoff) Cc: n_hibma@FreeBSD.ORG, freebsd-bugs@FreeBSD.ORG Subject: Re: bin/115: systat iostat display doesn't scale high enough Message-ID: <199907161915.NAA52003@panzer.kdm.org> In-Reply-To: <199907161804.LAA74742@idiom.com> from David Muir Sharnoff at "Jul 16, 1999 11:04:57 am"
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David Muir Sharnoff wrote... > * Synopsis: systat iostat display doesn't scale high enough > * > * State-Changed-From-To: suspended->closed > * State-Changed-By: n_hibma > * State-Changed-When: Fri Jul 16 10:15:48 PDT 1999 > * State-Changed-Why: > * Systat has been updated to use Mb/s instead of bps. On a system here it > * kind of represents the right thing at 6Mb/s (as accurate as you get on an > * ASCII display). > * > * For the record, this PR was filed on > * > * Sat Jan 14 03:40:02 1995 > * > * :-) > > I don't think you should close that problem report. > > This snapshot from :iostat taken today. > > /0 /5 /10 /15 /20 /25 /30 /35 /40 /45 /50 > da0 MB/s > tps|XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX51.70 > da1 MB/sX > tps|XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX127.75 > da2 MB/s > tps|XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX [ ... ] > systat still doesn't scale high enough. The problem here is that the scale at the top has to work for three different things -- megabytes per second, transactions per second, and kilobytes per transaction. We could make the scale larger, so that you get a better picture of transactions per second, but then the scale would be off for megabytes per second on most systems. (kilobytes per transaction as well) Really, IMO, the standard systat -iostat display isn't very useful. I think the :numbers version of the display is more useful, and easier to read. The -vmstat display gives you more overall information, and iostat(8) is better for long term statistics gathering. Ken -- Kenneth Merry ken@plutotech.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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