disk wait mystery

[Brett Wynkoop]

On Wed, 30 Jan 2013 10:39:37 +0100
"Ronald Klop" <ronald-freebsd8 at klop.yi.org> wrote:

> On Wed, 30 Jan 2013 06:18:49 +0100, Brett Wynkoop <wynkoop at wynn.com>
> wrote:
> 
> > Greeting-
> >
> > Can anyone figure out why a mainly idle bone with only 2 user
> > shells via ssh running would have so much in disk wait?
> >
> > wynkoop at beaglebone:~ % !ps
> > ps ax
> > PID TT  STAT     TIME COMMAND
> >   0  -  DLs   0:00.02 [kernel]
> >   1  -  ILs   0:00.20 /sbin/init --
> >   2  -  DL    0:00.00 [xpt_thrd]
> >   3  -  DL    0:01.92 [task: mmc/sd card]
> >   4  -  DL    0:00.01 [pagedaemon]
> >   5  -  DL    0:00.00 [vmdaemon]
> >   6  -  DL    0:00.00 [pagezero]
> >   7  -  DL    0:00.02 [bufdaemon]
> >   8  -  DL    0:00.02 [vnlru]
> >   9  -  DL    0:00.10 [syncer]
> >  10  -  RL   17:15.90 [idle]
> >  11  -  WL    0:07.91 [intr]
> >  12  -  DL    0:00.17 [geom]
> >  13  -  DL    0:00.21 [yarrow]
> >  14  -  DL    0:00.06 [softdepflush]
> >  15  -  DL    0:00.15 [schedcpu]
> > 106  -  DL    0:00.00 [md0]
> > 410  -  Is    0:00.06 dhclient: cpsw0 [priv] (dhclient)
> > 448  -  Is    0:00.07 dhclient: cpsw0 (dhclient)
> > 449  -  Is    0:00.01 /sbin/devd
> > 634  -  Is    0:00.04 /usr/sbin/sshd
> > 638  -  Is    0:00.55 /usr/sbin/cron -s
> > 682  -  Is    0:00.64 sshd: wynkoop [priv] (sshd)
> > 685  -  S     0:00.29 sshd: wynkoop at pts/0 (sshd)
> > 678 u0  Is+   0:00.19 /usr/libexec/getty std.9600 ttyu0
> > 686  0  Ss    0:00.74 -csh (csh)
> > 831  0  R+    0:00.16 ps ax
> > wynkoop at beaglebone:~ %
> >
> > -Brett
> >
> 
> Hi,
> 
> Maybe I missed a previous email, but you don't provide much
> information for people to think about.
> As a start you might show the 'disk wait' output.
> 
> Ronald.
> 

Ronald-

From the ps man page:
              D       Marks a process in disk (or other short term,
              uninterruptible) wait.


Note all the D entries in the above ps output.

-Brett

_______________________________________________
> freebsd-arm at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-arm
> To unsubscribe, send any mail to "freebsd-arm-unsubscribe at freebsd.org"



-- 

wynkoop at wynn.com               http://prd4.wynn.com/wynkoop/pgp-keys.txt
917-642-6925
718-717-5435

"The strongest reason for the people to retain the right to keep 
and bear arms is, as a last resort, to protect themselves against 
tyranny in government" - Thomas Jefferson.