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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--mP3DRpeJDSE+ciuQ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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 ? >=20 > "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=20 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=20 automate the process of telling you, where you have problems with your machine or what kernel parameters need an update ?? Andreas /// --=20 Andreas Klemm - Powered by FreeBSD 4.7 Need a magic printfilter today ? -> http://www.apsfilter.org/ --mP3DRpeJDSE+ciuQ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (FreeBSD) iD8DBQE+lnkqd3o+lGxvbLoRAjW2AJ91CDUxnFOzbdqqzDLYcBgKH0wcHgCgoFOJ 4tBTMvwt83DcWMOJQu91F+o= =H0/E -----END PGP SIGNATURE----- --mP3DRpeJDSE+ciuQ--
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