RE: Measure CPU utilization for a database

From: <Joel.Patterson_at_crowley.com>
Date: Wed, 6 Apr 2011 09:42:50 -0400
Message-ID: <C95D75DD2E01DD4D81124D104D317ACA161553DA6F_at_JAXMSG01.crowley.com>

I read the thread backwards, so I figure you are already past this comment. Sorry if this is redundant.

Joel Patterson
Database Administrator
904 727-2546

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From: Patterson, Joel
Sent: Wednesday, April 06, 2011 9:40 AM
To: 'Sreejith.Sreekantan_at_ibsplc.com'; fmhabash Cc: oracle-l_at_freelists.org
Subject: RE: Measure CPU utilization for a database

For a moment in time.

Also the % is an average over the last X minutes, whatever that is. I think you will find that if you add up all the CPU % busy for each instance on the host, the will sum to greater than 100%.

To actually 'average' each instance across 24 hours is much harder in that the CPU for each instance can fluctuate a lot. Batch processing at night is also a facter that will make the CPU fluctuate

Joel Patterson
Database Administrator
904 727-2546

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From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Sreejith S Nair Sent: Wednesday, April 06, 2011 8:44 AM
To: fmhabash
Cc: oracle-l_at_freelists.org
Subject: Re: Measure CPU utilization for a database

Thanks,
Since this figure comes from the snapshot values which my formula was derived from, Can we use the values which are stored in dynamic views as mentioned in my calculation?

With Regards,
Sreejith

--
Sreejith S Nair
Associate Systems Architect | AOS DBA Team



From:        fmhabash <fmhabash_at_gmail.com>
To:        Sreejith.Sreekantan_at_ibsplc.com
Cc:        oracle-l_at_freelists.org
Date:        04/06/2011 06:09 PM
Subject:        Re: Measure CPU utilization for a database


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Go after awr INSTANCE CPU PERCENTAGES: % of busy cpu for instance. This
gives you instance cpu as percent of total host cpu.

Thank you.







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Received on Wed Apr 06 2011 - 08:42:50 CDT