Re: see higher CPU usage after increase SGA
- From: Jared Still <jkstill@xxxxxxxxxx>
- To: Oracle-L Freelists <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 10 Jun 2004 07:46:09 -0700
On Wed, 2004-06-09 at 23:40, zhu chao wrote:
> 1. Sorry I did not measure the application response time. As there are too
> many connections to the database.
That is the one thing you should measure.
> I *GUESS* there won't be noticable speedup in the program, as database
> layer is just maybe 30-50% of total application response time, and the
> application WAS pretty fast, most of them finished in 0.001-0.05Second.
> 2. What is most important to me is: Scalability, that is, to support more
> user, more transactions. As this is difficult to measure how much more
> business we can support, we use System Resource Usage percent to estimate
> it. So sorry, the answer to your second question is: Ratio. Do you have
> some suggestion about measure capacity other than the resource utilization
> ratio? Thanks.
You don't quite see the flaw in that.
Scalability from an application perspective is just as you stated it,
the measure of how many business transactions the App and HW can
support.
Using a ratio will not provide that measure. Ratios don't provide
an indicator of how many transactions the system can handle, and
don't provide any clues as to how to improve scalability.
Jared
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