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Test command

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# 8  
Old 02-26-2010
Quote:
Originally Posted by thillai_selvan
So do u mean that from the top command's output which will list the process about their %CPU occupied level. In that you want to kill that process. Am I correct? Not the process Id greater than 25?
exactly.. but i think it would be better to do it with ps
# 9  
Old 02-26-2010
Loking more closely at your original post and guessing the version of "ps", I think you will find that column 4 of "ps -f" with heading "C" is not true CPU percentage. It is however a figure related to CPU usage and used for scheduling.

When the figure is rising towards 255, unix lowers the priority of the task to stop it hogging a CPU. The number in the "C" column then goes down until the machine is less busy whence unix then ups the priority again.
# 10  
Old 02-27-2010
so.. is there any command that i can kill processes with, that are using more tan 25% of the CPU?
# 11  
Old 02-27-2010
Code:
ps -efopid,pcpu |
while read pid cpu
do
  [ ${cpu%.*} -gt 25 ] && kill "$pid"
done

# 12  
Old 02-28-2010
@dadiT
Please post which Operating System you have and the number of CPUs on you server.

Unless this is coursework it is not sensible to kill a process just because it has a high %cu usage.
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