Thanks a lot for that info seems now i can get the whole picture
HansF wrote:
> On Tue, 04 Jul 2006 20:20:06 -0700, Dibur wrote:
>
> > What is meant by performance benchmarking, how do we estimate the upper
> > limits for a db created on a specific server enviornment.
>
> 1) Performance benchmarking has many different meanings. And many of the
> meanings are simply not very meaningful.
>
> In general, I think the term is used to mean a time to complete a
> specific action of set of actions.
>
> Benchmarks - the time to complete a specific action, and the conditions
> for the benchmark (hardware, memory, tuning parameters, phase of the moon)
> are usually saved to permit comparisons at a later date or under different
> conditions.
>
> Some organizations, such as the TPC (http://www.tpc.org) have created a
> 'standard set of actions' to be used. This has allowed companies to
> compete for bragging rights to being able to complete the actions in the
> shortest amount of time - using advanced tuning techniques, faster
> hardware, and any number of tricks.
>
> Bottom line with benchmarks is that YOU need to determine a set of actions
> that are meaningful to you. When things change (better or worse doesn't
> matter, just change), you can then attempt to understand the reasons for
> the difference - often in the hope to make things [even] better.
>
> Relying on anyone else's benchmark to make a determination of anything is
> generally useless (which may be the reason why management wants to see the
> benchmarks from others.)
>
> 2) What do you man by 'upper limits of the DB'?
>
> Operating system specific limits, when provided at all, are provided in
> the appendix of the installation manual for the operating system. General
> limits are provided in the Oracle Database Reference manual.
>
> These limits relate to size capabilities, not performance.
>
> Performance limits may be guesstimated by looking at the TPC results.
> However, the TCP results are the result of very specialized tuning by
> professionals for very specific purposes under very specific conditions
> and for vvery specific durations. Deviation from any of the operation
> environment conditions, data set size, or expertise of the tuners will
> cause different results.
>
> --
> Hans Forbrich (mailto: Fuzzy.GreyBeard_at_gmail.com)
> *** Feel free to correct me when I'm wrong!
> *** Top posting [replies] guarantees I won't respond.
Received on Thu Jul 06 2006 - 09:03:01 CDT
