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тАО10-10-2007 05:18 PM
тАО10-10-2007 05:18 PM
thx
Solved! Go to Solution.
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тАО10-10-2007 05:35 PM
тАО10-10-2007 05:35 PM
Re: CPU utilization
Your kernel has a scheduler that hands out tiem slices. A single process gets 90% of CPU because no other processes demand it. In a normal situation where there are a number of processes demanding CPU, no one process will get a high figure.
Limiting a single process to a certain percentage will merely slow down how quickly the system gets work done when its running single threaded.
So its not advisable to do as you suggest.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
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Founder http://newdatacloud.com
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тАО10-10-2007 05:41 PM
тАО10-10-2007 05:41 PM
Re: CPU utilization
If some processes are niced, they may be starved.
ust3 may want to nice that process that is getting 90% and that way the others are sure to get CPU time if they need it.
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тАО10-10-2007 06:31 PM
тАО10-10-2007 06:31 PM
Re: CPU utilization
You can consider using PRM (Performance Resource Manager) which can help you to maintain CPU threshold.
http://h20392.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=B3835DATRY
WK
http://forums1.itrc.hp.com/service/forums/helptips.do?#33
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тАО10-11-2007 12:01 AM
тАО10-11-2007 12:01 AM
Solutionwhile :
do
:
done
If you run this little script, one CPU will jump to 100% CPU usage. Run 10 copies on an 8-CPU system and all your CPUs will be busy BUT you can still login and run vi and database programs will run, etc. This shows that CPU usage is not an important metric by itself for performance tuning.
Now if this little script is changed to perform system calls such as date or a simple filesystem query such as echo *, then the script will have a much bigger impact on performance.
SO while you can purchase PRM and limit CPU usage, I don't think you'll see an improvement in overall performance until you look at disk and network activities. Only the Glance product will give the details that you need.
Bill Hassell, sysadmin