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CPU utilization [message #585593] Tue, 28 May 2013 03:15 Go to next message
vijayjakka99
Messages: 12
Registered: May 2013
Junior Member
Dear friends,

why CPU utilization is high(99%) on one server in 2 node RAC at every time. On the other server it is very low.
please suggest.

Re: CPU utilization [message #585604 is a reply to message #585593] Tue, 28 May 2013 04:36 Go to previous messageGo to next message
Michel Cadot
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Registered: March 2007
Location: Nanterre, France, http://...
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Because someone is using 99% of the CPU.

Regards
Michel
Re: CPU utilization [message #586007 is a reply to message #585604] Sat, 01 June 2013 05:38 Go to previous messageGo to next message
vijayjakka99
Messages: 12
Registered: May 2013
Junior Member
Dear michel,

my question is because it is cluster why it is not sharing. how to control the cpu utilization. And you know what cluster node is rebooting automatically for every one or two days might be because of CPU. It is a producation server i am in serious trouble. Please suggest.

regards,
Vijaykumar.
Re: CPU utilization [message #586008 is a reply to message #586007] Sat, 01 June 2013 05:50 Go to previous messageGo to next message
Michel Cadot
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Location: Nanterre, France, http://...
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If one process is using 99% of the CPU then this process cannot be shared across server, it is a lone one and there is no half-process.

Regards
Michel
Re: CPU utilization [message #586010 is a reply to message #586008] Sat, 01 June 2013 05:53 Go to previous messageGo to next message
vijayjakka99
Messages: 12
Registered: May 2013
Junior Member
its not a single process which is using 99%. its a collection of all processes like oracle. i found many oracle processes are running.

Regards,
vijay.
Re: CPU utilization [message #586011 is a reply to message #586010] Sat, 01 June 2013 06:02 Go to previous messageGo to next message
John Watson
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Registered: January 2010
Location: Global Village
Senior Member
If you are running Enterprise Edition RAC, you can limit CPU with the Resource Manager. It is quite possible that the node evictions are because of CPU usage, so you must do this. Setting the css priority might also help, raise it to the maximum if that has not been done already.
Alternatively, if the CPU usage is high because sessions are not being balanced across both nodes, you will need to investigate the connect time load balancing that you have set up.
Re: CPU utilization [message #586012 is a reply to message #586011] Sat, 01 June 2013 06:06 Go to previous messageGo to next message
vijayjakka99
Messages: 12
Registered: May 2013
Junior Member
ok michel i will follow your suggestions and i will get back to you. Thanks.

Vijay.
Re: CPU utilization [message #586068 is a reply to message #586012] Mon, 03 June 2013 04:47 Go to previous messageGo to next message
vijayjakka99
Messages: 12
Registered: May 2013
Junior Member
Dear Michel,

What is CSS priority? Is CSS Diagwait and CSS priority both are same? If not Could you please help me out how to set the CSS priority?

Regards,
vijay.
Re: CPU utilization [message #586326 is a reply to message #586068] Wed, 05 June 2013 05:21 Go to previous messageGo to next message
vijayjakka99
Messages: 12
Registered: May 2013
Junior Member
Dear Michel,

Is it possible to limit the CPU on AIX6.1 servers.Please suggest.

regards,
Vijay.
Re: CPU utilization [message #586331 is a reply to message #586326] Wed, 05 June 2013 05:28 Go to previous message
Michel Cadot
Messages: 57602
Registered: March 2007
Location: Nanterre, France, http://...
Senior Member
Account Moderator
Note that this is John not me that suggest you that.
I think you can but I advise you to ask your sysadmin.

Regards
Michel
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