Re: oracle sql developer tool - Execution time

On Oct 13, 9:07 pm, "fitzjarr..._at_cox.net" <orat..._at_msn.com> wrote:
> Comments embedded.
> On Oct 13, 8:35 am, raja <dextersu..._at_gmail.com> wrote:
>
> > Hi,
>
> > Anyone who has used oracle sql developer tool, please answer my
> > question :
>
> > How can view the execution time ?
>
> It's usually displayed atop the Script Runner window.
>
> > The execution time that i getting seems to be wrong.
>
> Define 'wrong'.  Simply because it isn't what you expect doesn't make
> it 'wrong'.
>
> > How can i find the correct execution time of a query....
>
> Use the SQL*Plus functionality by typing:
>
> set timing on
>
> in the query text window.  You'll then see output after your query
> results indicating the elapsed time for that query.  Yes, this may
> differ from what SQL Developer reports in its default timing display,
> but no one said that the time displayed in that 'window' is the actual
> query time.  It's likely the overall time required to send the query,
> return the results and then display that information across the
> network to your PC.  Both values are 'correct', even though they don't
> match, as the criteria for determining each is different.
>
> A proper frame of reference, which doesn't include assumptions, is
> necessary.
>
>
>
> > Any other features, that can help in performance tuning. If possible,
> > Please explain them too.
>
> The usual array of functions is available:
>
> Explain Plan
> Autotrace
> set timing on
>
> All contribute to understanding what Oracle is doing to return your
> results.  In addition you can set the following events and generate
> trace files:
>
> 10046 (captures session statistics for all queries executed after the
> event is set)
> 10053 (reports what the CBO is doing to determine the query plan)
> 10032 (reports on sort operations and whether or not any go to disk)
>
> To explain these would take a book, and you can buy your own copy of
> "Cost-Based Oracle Fundamentals", by Jonathan Lewis and read up on
> these events and what they do.  You should also purchase a copy of
> Cary Millsap's fine text "Optimizing Oracle Performance".
>
> To assist you in locating these excellent references:
>
> Publisher
> Title                                                             ISBN
>
> Apress                          "Cost-Based Oracle
> Fundamentals"                1-59059-636-6
> O'Reilly Press                "Optimizing Oracle
> Performance"                    0-596-00527-X
>
>
>
> > Thanks in Advance.
> > With Regards,
> > Raja.
>
> David Fitzjarrell

Hi,

Thanks a lot for the detailed explanation.

With Regards,
Raja. Received on Tue Oct 14 2008 - 08:20:48 CEST