CentOS - Aug 2005 - My CentOs 4.1 desktop starts to freez ( non-responsive) with 100% cpu usage

It starts to become a non-responsive from time to time
with 100% cpu usage eventhough there is no
applications running except a browser. I have been
running centos 4 for the past 6 months without any
problem with regular update. Now, I have to reboot
whenever it shows signs of a non-response.  It starts
to exhibit this behaviour a cople of days ago. I could
not figure it out the reason and need help.

Is there any tools to troubleshoot this ? I have tried
top, system monitor..

I have attache screen shoot of system monitor if it
helps.

Mohamed Yusuf


	

	
		
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mohamed yusuf <myusuf32 at yahoo.ca> wrote:
> Is there any tools to troubleshoot this ? I have tried
> top, system monitor..
And you're seeing no CPU?

What about vmstat and iostat?
Especially vmstat, unless you're doing audio, network and/or
disk, then iostat.

It's hard to pin-point I/O usage in Linux, but even desktops
today can literally feel the pinch of I/O.
> I have attache screen shoot of system monitor if it
> helps.
Well, _regardless_, I would run something like this:

  while true; do
    date >> /tmp/mystat.log 2>&1
    for i in `seq 1 100`; do
      vmstat 1 1 >> /tmp/mystat.log 2>&1
      iostat -d 1 1 >> /tmp/mystat.log 2>&1
      sleep 3 
    done
  done
>From a script, and call it in the background.

-- 
Bryan J. Smith                | Sent from Yahoo Mail
mailto:b.j.smith at ieee.org     |  (please excuse any
http://thebs413.blogspot.com/ |   missing headers)

Hello Mohamed,

I can only guess what is happening exactly, but i suspect some process
is running wild. I have encountered such a problem with Firefox and the
Flash- or Java-plugin.

It will help to know the process which uses up all CPU. Try using top.
It shows much more information than the Gnome System Monitor and you'll
find the process quite soon.

Regards,
Andreas
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Thanks Andreas,

I think you are right. The culprit appears to be
firefox browser which took about 180 meg of ram. I
don't know why ? 
Anyway, I swiched to opera browser and it's ok now

Mohamed 

   
--- Andreas Rogge <arogge at gmx.de> wrote:
> Hello Mohamed,
> 
> I can only guess what is happening exactly, but i
> suspect some process
> is running wild. I have encountered such a problem
> with Firefox and the
> Flash- or Java-plugin.
> 
> It will help to know the process which uses up all
> CPU. Try using top.
> It shows much more information than the Gnome System
> Monitor and you'll
> find the process quite soon.
> 
> Regards,
> Andreas
> > _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
> 

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