High System CPU Usage

[Maung Nanda Linn Aung]

Maybe this one would help you.
http://www.cyberciti.biz/tips/how-do-i-find-out-linux-cpu-utilization.html



On Wed, Nov 26, 2008 at 2:55 PM, Rangi, Jai <jrangi at automotive.com> wrote:

> In top, I only see java and mysql showing part of user CPU, I need to
> know what application/process is using system cpu.
>
> -Jai
>
> -----Original Message-----
> From: redhat-list-bounces at redhat.com
> [mailto:redhat-list-bounces at redhat.com] On Behalf Of gopanapalli pradeep
> Sent: Tuesday, November 25, 2008 10:19 PM
> To: General Red Hat Linux discussion list
> Subject: Re: High System CPU Usage
>
> I think u can use top
> which will show the processes running on each cpu
>
>
>
>
> ________________________________
> From: "Rangi, Jai" <jrangi at automotive.com>
> To: redhat-list at redhat.com
> Sent: Wednesday, November 26, 2008 11:44:24 AM
> Subject: High System CPU Usage
>
> All,
>
> I have a cluster of 7 servers (ns client) running hava application and 1
> NFS server. Sometime In the top output system CPU is 55%.
>
> Could some give me a clues what might be causing system CPU to be that
> high.
>
> Tried these
>
> Ps -eo pid,user,%cpu,args -sort %cpu the top list was java process and
> mysql using 39% and 4% max.
>
> Checked the output from sar -c, sar -b and at the peak time
>
>
>
> 04:10:02 PM    proc/s
>
> 04:20:01 PM     40.02
>
> 04:30:01 PM     34.65
>
> 04:40:02 PM     35.74
>
> 04:50:01 PM     36.13
>
> 05:00:01 PM     40.61
>
> 05:10:01 PM     38.42
>
> 05:20:01 PM     32.75
>
>
>
> Sar -P all
>
> 04:20:01 PM       CPU     %user     %nice   %system   %iowait     %idle
>
> 04:30:01 PM       all     22.70      0.00     64.87      1.83     10.61
>
> 04:30:01 PM         0     24.14      0.00     63.88      1.69     10.29
>
> 04:30:01 PM         1     21.25      0.00     65.86      1.97     10.92
>
> 04:40:02 PM       all     22.21      0.00     66.27      1.51     10.01
>
> 04:40:02 PM         0     23.53      0.00     65.23      1.53      9.71
>
> 04:40:02 PM         1     20.89      0.00     67.30      1.50     10.31
>
> 04:50:01 PM       all     22.55      0.00     66.49      1.45      9.52
>
>
>
> I can see the high usage by System CPU, but I want to find out what
> might be causing this high so High System CPU. Any lead would be
> appreciated.
>
>
>
> Jai
>
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-- 
Best Regards,

Nanda Linn Aung
http://infomm.com

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