Date: Fri, 11 Apr 2003 10:13:30 +0200 From: Andreas Klemm <andreas@freebsd.org> To: Peter Jeremy <peterjeremy@optushome.com.au> Cc: freebsd-hackers@freebsd.org Subject: Re: Solaris 2.x compat. system accounting, sarcheck for fbsd (commercial) Message-ID: <20030411081330.GA918@titan.klemm.apsfilter.org> In-Reply-To: <20030411080102.GC47320@cirb503493.alcatel.com.au> References: <20030411060823.GA27575@titan.klemm.apsfilter.org> <20030411080102.GC47320@cirb503493.alcatel.com.au>
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[-- Attachment #1 --] On Fri, Apr 11, 2003 at 06:01:03PM +1000, Peter Jeremy wrote: > On Fri, Apr 11, 2003 at 08:08:23AM +0200, Andreas Klemm wrote: > >I wrote some performance monitoring utilities and need for > >example a parameter wait for I/O, that I didn't find in our > >tools, did I overlook something ? > > "wait for I/O" is a System-V state that BSD doesn't measure. > One of the grey[er] beards may be able to answer why SysV does > and BSD doesn't consider "wait for I/O" a state worth measuring. Would be interested to hear why, since I think its an interesting parameter. At least I know of some sun consultants who are the opineon, that this is an important parameter. If I understood the parameter right it should bring you a value, who measures how often (in percentage) the CPU had to wait for I/O operations. Not only disk, additionally network I/O as well (from hearsay) but Im not 100% sure about it. So theoretically it should bring to you a value, if you are I/O bound. Togehter with other values (disk I/O and Network stats it should be easy to see, if you have a problem with your disks or with your network). BTW, are there some automatic tools around for BSD, that automate the process of telling you, where you have problems with your machine or what kernel parameters need an update ?? Andreas /// -- Andreas Klemm - Powered by FreeBSD 4.7 Need a magic printfilter today ? -> http://www.apsfilter.org/ [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (FreeBSD) iD8DBQE+lnkqd3o+lGxvbLoRAjW2AJ91CDUxnFOzbdqqzDLYcBgKH0wcHgCgoFOJ 4tBTMvwt83DcWMOJQu91F+o= =H0/E -----END PGP SIGNATURE-----help
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