RE: What is the best way to estimate capacity?
- From: Upendra N <nupendra@xxxxxxxxxxx>
- To: <martin.a.berger@xxxxxxxxx>
- Date: Mon, 17 Oct 2011 17:28:33 -0400
Thanks Martin. "CPU Time" is certainly a good place to start...
This box is running 15 database instances (with varying workloads), and a
majority of them are on 8.1.7.4 and the rest are on 9i.
I found that 8.1.7.4 database could be configured to work with 10g Grid
control. I am thinking of registering them in Grid control and gather history
at the database level.. hopefully it provides some useful information.
Thanks a bunch
-Upendra
> From: martin.a.berger@xxxxxxxxx
> Date: Mon, 17 Oct 2011 23:11:21 +0200
> Subject: Re: What is the best way to estimate capacity?
> To: nupendra@xxxxxxxxxxx
> CC: oracle-l@xxxxxxxxxxxxx
>
> Upendra,
>
> you can check for "CPU Time" events in AWR and even in statspack.
> These data might be just imprecise, but at least it's a starting
> point. In recent versions you can also use V$SYSMETRIC_HISTORY or
> DBA_HIST_SYSMETRIC_SUMMARY to compare the number of "CPU Time" to the
> system load.
>
> hopefully this is a start of some breadcrumbs for you,
> Martin
>
> On Thu, Oct 13, 2011 at 23:12, Upendra N <nupendra@xxxxxxxxxxx> wrote:
> >
> >
> >
> >
> > Hello all,
> > If a server is running multiple databases (ranges from 8.1.7.4 to 10.2). Is
> > there a way to estimate the CPU capacity that are used by each of the
> > database which will relate to the OS system load?
> > We do have AWR (tuning/diagnostic packs) for 10.2 databases, but we may
> > have to rely on other methods for 8i databases.
> >
> > I'm trying to arrive at something like this:
> > Database-1 = 30%
> > Database-2 = 20%
> > Database-3 = 10%
> > Database-4 = 40%
> >
> > The hardware platform is Sun Sparc Solaris 9.
> >
> > I'm trying to relocate a few databases to newer platform. With the move I'd
> > like to recoup some of the Oracle licenses by reducing CPU capacity
> > (turning the CPUs off or physically pull them out ) on the legacy servers.
> > Your suggestions are greatly appreciated.
> >
> > Thanks
> > -Upendra
> >
> > --
> > //www.freelists.org/webpage/oracle-l
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