High System CPU Usage

[Rangi, Jai]

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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