Re: Tuning unknown applications

Was it you that coined the term tim?

There are days when I look at what is running inside the databases here and feel like I need to look at\rewrite everything. Then there are days when I start with...“what needs improving and what doesn't“. Those days end much better.

Chris

• Original Message ----- From: Tim Gorman [mailto:tim_at_evdbt.com] Sent: Wednesday, March 23, 2011 05:19 PM To: oracle-l_at_freelists.org <oracle-l_at_freelists.org> Subject: Re: Tuning unknown applications

Don't bother learning the application, focus on what the users say is hurting them. Step #1) look for the SQL statements taking tons of elapsed-time or response-time, #2) focus on the worst two or three SQL statements, #3) fix them, #4) implement the fix in production, and #5) repeat all over again starting from step #1.

Best to use SQL tracing on specific programs identified by users as performing poorly. Check out white papers on www.method-r.com on tuning methodology and consider buying the book "Optimizing Oracle Performance" by Millsap and Holt (O'Reilly, 2003).

On 3/23/2011 3:44 PM, Ram Raman wrote:
> List,
> When DBAs are put in charge of unknown applications not developed in
> house or put in charge of third party COTS applications, how do we go
> about learning the systems and tune such systems. This is an open
> ended question, but when I am asked to tune things, I am not sure how
> I would start without knowing the processes and data structure.
> Thanks.

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