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Date:      Sat, 24 Jun 2006 12:06:56 +0300
From:      Kostik Belousov <kostikbel@gmail.com>
To:        Dmitry Morozovsky <marck@rinet.ru>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: vmstat 'b' (disk busy?) field keeps climbing ...
Message-ID:  <20060624090656.GB79678@deviant.kiev.zoral.com.ua>
In-Reply-To: <20060624115505.E14669@woozle.rinet.ru>
References:  <20060623172557.H1114@ganymede.hub.org> <261AD16B-C3FE-4671-996E-563053508CE8@mac.com> <20060624022227.X1114@ganymede.hub.org> <20060624115505.E14669@woozle.rinet.ru>

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On Sat, Jun 24, 2006 at 11:55:26AM +0400, Dmitry Morozovsky wrote:
> On Sat, 24 Jun 2006, Marc G. Fournier wrote:
>=20
> MGF> > 'b' stands for "blocked", not "busy".  Judging by your page fault =
rate
> MGF> > and the high number of frees and pages being scanned, you're proba=
bly
> MGF> > swapping tasks in and out and are waiting on disk.  Take a look at
> MGF> > "vmstat -s", and consider adding more RAM if this is correct...
> MGF>=20
> MGF> is there a way of finding out what processes are blocked?
>=20
> Aren't they in 'D' status by ps?
Use ps axlww. In this way, at least actual blocking points are shown.

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