Re: STAT of Process

[export@hope.cz]

Stan,
Thank you for your reply.
It is my own daemon( I wrote it by myself) and do not know why it changes the STAT.

I found out that STAT field is
D   for  Uninterruptible sleep (usually IO)
R  for   Running or runnable (on run queue)
S   for  Interruptible sleep (waiting for an event to complete)

but what does Uninterruptible sleep means? And what is it caused by?
Can anyone explain that problem?
(When STAT is D for the  daemon , the daemon does not seem to run )

Thanks
L.


> export@hope.cz put forth on 4/16/2010 5:23 AM:
> > I have a daemon running on my Debian ( Lenny) box.When it is  started ,
> > I check the process state ( by ps -ax command) and I can see in STAT column S 
> > letter and the daemon works as it should.After some time, the STAT is changed to 
> > R but the daemon still works OK.But after few hours the STAT is changed to D 
> > letter and the daemon does not work properly.It seems as if it is stopped 
> > running eventhough it is among the list of processes.
> > Can anyone explain that please?
> 
> Which daemon?
> 
> -- 
> Stan
> 
> 
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