RE: Estimating User Load on the system

Raj

   I'll second Jared's idea. Don Burleson in his book Oracle9i High-Performance Tuning with STATSPACK makes a strong point that looking at system load must start with the underlying system. Any look at Oracle performance must begin with an understanding of what the system load was at that time. As Jared points out, the three components are CPU, I/O, and memory. For example, you may find that one of these target users is the high CPU consumer from an Oracle perspective at a point in time. Now, if you discovered the system CPUs weren't being taxed at that time your conclusions might be different than if you discovered the system CPUs were pegged at 100% at that time.

Dennis Williams
DBA, 80%OCP, 100% DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com

-----Original Message-----
From: Jared Still [mailto:jkstill_at_cybcon.com] Sent: Monday, July 14, 2003 10:19 AM
To: Multiple recipients of list ORACLE-L Subject: Re: Estimating User Load on the system

Load on a system is in general comprised of three components: CPU, memory and IO.

If you have something in place to track those on a per user basis, then you're doing well. You might consider also tracking other users, so that you have a basis for comparison.

Jared

On Monday 14 July 2003 07:04, Jamadagni, Rajendra wrote:
> I have been asked to compute the load put on the system by a 'select group
> of userids'. I know these users and have put something in place where I
> sample periodically following
>
> 1. session stats
> 2. session io
> 3. system stats
> 4. number of sessions
> 5. v$transaction
>
> Am I missing something? Has anyone done this before? If so, what have you
> computed ?
>
> TIA
> Raj
>

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Author: Jared Still
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