Date: Fri, 17 Apr 1998 16:53:24 +0200 (MET DST) From: Mathias Picker <mathiasp@virtual-earth.de> To: gpalmer@FreeBSD.ORG Cc: freebsd-stable@FreeBSD.ORG Subject: Re: FreeBSD and Sendmail Message-ID: <199804171453.QAA02036@mp.virtual-earth.de> In-Reply-To: <9061.892819234@gjp.erols.com>
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On 17 Apr, Gary Palmer wrote:
> Greg Hormann wrote in message ID
> <Pine.BSI.3.95.980416201320.5907B-100000@wawasee.read.indiana.edu>:
[snip]
> Thanks for the hints (I already know systat :-) ), but the figures don't
> really account for idleness, just busyness. There is no measure of how
> much capacity is left in the drive to do i/o operations. (Believe me, I
> watch systat -v 1 like a hawk during performance tuning)
>
> The vmstat display basically shows the same ammount of info about
> the disks that iostat does, just differently. Stuff not available:
>
> - Number of queued tagged commands (if supported). This could give
> a rough indication of if the drive was busy or not.
>
> - Average seek time. The number of transactions/second (or seeks/sec)
Try using the msps option in systat -i ?? The manpage says:
msps Toggle the display of average seek time (the de-
fault is to not display seek times).
I don't know if it's correct, but it does show some numbers :)
--
Mathias Picker
Social Studies * Information Architecture
Mathias.Picker@virtual-earth.de
+49 172 / 89 19 381
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