Re: measuring TPM

I would say that it depends on the system. If we are talking about a stock trading system, then TPM is very important as is transaction-time-to-completion. For a data warehouse, this may be absolutely meaningless. Of course, does TPM describe the width of the database pipe or it's depth? In the first case, it could process 42 tx/min by doing 42 concurrent tx each a minute in duration. Or it could do 42 tx in serial each lasting 1.42 seconds (yes the math is correct (or almost)...try it yourself by dividing 60/42).

One thing about TPM is that it is objective (if the size and nature of T can be defined). Unfortunately, Response Time Satisfaction is subjective and tougher to measure.

Daniel

"Thater, William" wrote:

> Daniel Fink scribbled on the wall in glitter crayon:
>
> > If that is what this is for, the formula is very simple. TPM = x*42
> > where x is a number sufficient to justify the really cool hardware
> > system you want.
>
> as a serious question, is TPM a valid measurement for a database? or are
> there other measurements that give a more valid picture of performance
> and/or utilization?
>
> --
> Bill "Shrek" Thater ORACLE DBA
> "I'm going to work my ticket if I can..." -- Gilwell song
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