Date: Sat, 24 Jun 2006 15:27:24 -0300 (ADT) From: "Marc G. Fournier" <scrappy@hub.org> To: Dmitry Morozovsky <marck@rinet.ru> Cc: Kostik Belousov <kostikbel@gmail.com>, freebsd-stable@freebsd.org Subject: Re: vmstat 'b' (disk busy?) field keeps climbing ... Message-ID: <20060624152525.D1114@ganymede.hub.org> In-Reply-To: <20060624221556.O30039@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> <20060624090656.GB79678@deviant.kiev.zoral.com.ua> <20060624145432.A1114@ganymede.hub.org> <20060624221556.O30039@woozle.rinet.ru>
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On Sat, 24 Jun 2006, Dmitry Morozovsky wrote:
> On Sat, 24 Jun 2006, Marc G. Fournier wrote:
>
> MGF> > > MGF> is there a way of finding out what processes are blocked?
> MGF> > >
> MGF> > > Aren't they in 'D' status by ps?
> MGF> > Use ps axlww. In this way, at least actual blocking points are shown.
> MGF>
> MGF> 'k, stupid question then ... what am I searching for?
> MGF>
> MGF> # ps axlww | awk '{print $9}' | sort | uniq -c | sort -nr
>
> Well, try
>
> ps axlww | awk '$10 ~ /^D[^L]/'
>
> which should give you a list of blocked-in-uninterruptible-syscall processes
> excluding kernel threads...
Nadda:
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto#
yet vmstat shows 4:
0 4 0 7248532 229668 545 0 0 0 735 0 5 0 365 3308 1529 15 8 78
0 4 0 7239388 222364 127 8 2 0 158 0 27 0 412 2324 1075 8 5 87
if I do it repeatedly, fairly often, I can occasionally get one or two:
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
0 18886 1 0 96 0 10316 5968 proctr DsJ ?? 0:02.81 /usr/local/sbin/httpd
0 19673 1 0 96 0 13776 6688 proctr DsJ ?? 0:02.88 /usr/local/sbin/httpd -DSSL
0 46540 46538 1 8 0 5020 2396 ppwait Ds p4 0:00.07 -csh (csh)
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
0 55163 55160 6 96 0 0 8 proctr DE ?? 0:00.00 uptime
0 46540 46538 1 96 0 5020 2396 proctr Ds p4 0:00.07 -csh (csh)
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
0 46540 46538 40 8 0 5020 2396 ppwait Ds p4 0:00.08 -csh (csh)
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
But its definitely not 'a consistent 4' ...
----
Marc G. Fournier Hub.Org Networking Services (http://www.hub.org)
Email . scrappy@hub.org MSN . scrappy@hub.org
Yahoo . yscrappy Skype: hub.org ICQ . 7615664
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