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CPU Utilization Issue

 
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# 1  
Old 10-13-2011
CPU Utilization Issue
Hello everyone.

I have a problem with my HP-UX (UNIX) server Recently my unix shows a high cpu utilization and idle = 0% ,checked using sar command
I need to find what I have to do to solve this problem, in fact, I don't know what is my problem.
Mentioned below is the sar command output.

Code:
11:07:54    %usr    %sys    %wio   %idle
11:07:55      20      80       0       0
11:07:56      18      82       0       0
11:07:57      16      84       0       0
11:07:58      19      81       0       0
11:07:59      18      82       0       0
11:08:00      15      85       0       0
11:08:01      17      83       0       0
11:08:02      13      87       0       0
11:08:03      18      82       0       0
11:08:04      12      88       0       0
Average       17      83       0       0


Please, help me to find what process is consuming too much space
Last edited by pludi; 10-13-2011 at 05:15 AM..
# 2  
Old 10-13-2011
Use "top" or "prstat" command to find the high CPU utilized process ...
Man Page for top (OpenSolaris Section 1) - The UNIX and Linux Forums
Man Page for prstat (OpenSolaris Section 1m) - The UNIX and Linux Forums
This User Gave Thanks to jayan_jay For This Post:
yadvinder
# 3  
Old 10-13-2011
Yes it does look a bit abnormal... what does top show? what OS version? What type of server (model) is it ? (standalone monolithic almost mainframe - RDBMS server - High claculation/statistics etc)
# 4  
Old 10-13-2011
Looks to be mostly system processes that are eating your cpu time.
I'm a Solaris / Linux chap but you could use a combination of ps, glance, vmstat.
The kernel may be pre-emting but it's impossible to say from the above sar output.
Check the r,b and sr (runnable queued, blocked and scan rate) from vmstat.
If this was Solaris I would point you towards dtrace but alas it's not.

Cheers
Steve
# 5  
Old 10-13-2011
If you have glance, use that utility. It is a separately licensed product (or was the last time I used it.)
# 6  
Old 10-19-2011
CPU Utilization Issue
Hi Everyone,

Thax for ur revert

OS I'm using is HP-UX.

Also please find the details in the attachment which contains the
output of top command,sar command and version of the server.

Waiting for ur reply as CPU utilization issue is still creating a problem.
Output_Details.doc (24.5 KB) 
# 7  
Old 10-19-2011
I'm not an HP-UX expert so am not totally familiar with how hp-ux handles top but looking at your output it appears the following are utilising rather high cpu resources
Code:
 0   ?       13598 root     240 20  1732K    32K run   8633:20 75.33 75.20 ps
 1   ?       13623 root     241 20  1764K    32K run   8581:02 72.20 72.07 ps
 0   ?        2334 root     239 20   310M    32K run   9594:23 50.34 50.25 ia64_corehw

It could be related to the hw monitoring of the system?
HP Communities - ia64_corehw using 90-100% of a cpu - Enterprise Business Community | HP Online Forum

Note: After posting the above I noticed the link is rather old (2005) but it does explain how to disable hw monitoring.
It may be worth disabling the HW monitoring temporarily to see if your cpu utilisation improves if it does you know your on the right track.

Regards,
SRG
Last edited by Scott; 11-03-2011 at 06:57 AM.. Reason: Code tags
This User Gave Thanks to Paragon1970 For This Post:
yadvinder
 
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