On Sat, Jun 24, 2006 at 09:52:03PM +0300, Kostik Belousov wrote: > On Sat, Jun 24, 2006 at 02:57:27PM -0300, Marc G. Fournier wrote: > > On Sat, 24 Jun 2006, Kostik Belousov wrote: > > > > >On Sat, Jun 24, 2006 at 11:55:26AM +0400, Dmitry Morozovsky wrote: > > >>On Sat, 24 Jun 2006, Marc G. Fournier wrote: > > >> > > >>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 > > >>probably > > >>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> > > >>MGF> is there a way of finding out what processes are blocked? > > >> > > >>Aren't they in 'D' status by ps? > > >Use ps axlww. In this way, at least actual blocking points are shown. > > > > 'k, stupid question then ... what am I searching for? > > > > # ps axlww | awk '{print $9}' | sort | uniq -c | sort -nr > > 654 select > > 230 lockf > > 166 wait > > 85 - > > 80 piperd > > 71 nanslp > > 33 kserel > > 22 user > > 10 pause > > 9 ttyin > > 5 sbwait > > 3 psleep > > 3 accept > > 2 kqread > > 2 Giant > > 1 vlruwt > > 1 syncer > > 1 sdflus > > 1 ppwait > > 1 ktrace > > 1 MWCHAN > > > > According to vmstat, I'm holding at '4 blocked' for the most part ... > > sbwwait is socket related, not disk ... and none of the others look right > > ... > I would say, using big magic cristall ball, that you problems are > not kernel-related. I see only too suspicious points: > > 1. high number of pipe readers and waiters for file locks. It may be > normal for your load. > > 2. 2 Giant holders/lockers. Is it constant ? Are the processes holding/waiting > for Giant are the same ? > > Anyway, being in your shoes, I would start looking at applications. > > Ah, and does dmesg show anything ?
And another question: what are the processes in the state "user" ? I never see that state. More, search thru the sources does not show what this could be.
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