Re: Instrumenting Poor performance

Hi Upendra,

is it always the same SQL_ID?
You an enable sql_trace for this particular SQL: alter system set events 'sql_trace[sql: <SQL_ID>] level=12';

I assume EBS can enable tracing for specific activities, but I'm not close to EBS, but maybe there are better solutions than simple sql_trace.

With the traces of different "good" and "bad" and see where the time is spent.

Do you have proper facility to create a profile based on these sql_trace files?

br,
 berx

Am Do., 13. Sep. 2018 um 21:11 Uhr schrieb Upendra nerilla < nupendra_at_hotmail.com>:

> Hello Team -
> We have an EBS application which is running EBS and several other modules
> (OTC). From time to time I see a particular query giving poor response
> time. Normal response is <4 mins and during the poor execution, it goes
> over an hour.
>
> We have a SQL baseline created for that SQL_ID and forcing the optimal
> plan. We are able to see that optimizer is using the same hash. There
> are no host resource (cpu/memory/io) constraints.. This job runs only a
> couple of times a day, very time sensitive for the business. We are unable
> to reproduce this at lower environments even when we performed refreshes..
>
> We see a pattern that this issue shows up during the first week of the
> month and disappears after a couple of days (not the same exact day).
> Here is what I am thinking of gathering - high level info..
>
> 1. Gather daily row count of all the tables involved in the query..
> 2. Review the jobs and see if there is anything unique..
>
> What else could I gather to troubleshoot this further?
> Appreciate any insights..
>
> Thank you
> -Upendra
>

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