Re: Historical Plan & Time

It's good stuff indeed, though you need to have paid the extra money to Oracle in order to run this query, except in se/se1 where it impossible to legaly run this query. :(

On 6/14/07, Shivaswamy Raghunath <shivaswamykr_at_gmail.com> wrote:
>
> Jeremy,
>
> Thanks. This is a good one.
>
> In order to find out which plan for the given SQL_ID was in effect at what
> time, I added plan_hash_value to your query.
> I think this is exactly what I was looking for:
>
> 16:01:55 Shiva>select distinct plan_hash_value, min(begin_interval_time)
> first,
> 16:02:02 2 max(end_interval_time) last
> 16:02:02 3 from dba_hist_sqlstat natural join dba_hist_snapshot
> 16:02:02 4 where sql_id='druz74ks91v35'
> 16:02:02 5 group by sql_id, plan_hash_value
> 16:02:02 6 order by 3;
> Plan
> Hash
> Value FIRST LAST
> ------------- -------------------------- --------------------------
> 1366996245 22-MAY-07 02.00.52.480 PM 22-MAY-07 03.00.08.009 PM
> 4248165369 25-MAY-07 03.00.46.849 PM 25-MAY-07 04.01.01.358 PM
> 3113788595 30-MAY-07 02.00.42.408 PM 30-MAY-07 03.00.57.097 PM
> 3244881609 30-MAY-07 04.00.11.473 PM 30-MAY-07 05.00.25.653 PM
> 3700884553 31-MAY-07 12.00.05.902 PM 31-MAY-07 01.00.19.467 PM
> 795688398 31-MAY-07 09.00.13.286 PM 31-MAY-07 10.00.27.115 PM
> 2960769051 31-MAY-07 07.00.45.399 PM 01-JUN-07 12.00.11.623 PM
> 853937962 01-JUN-07 01.00.27.646 PM 03-JUN-07 07.00.41.343 PM
> 2354157810 22-MAY-07 09.00.36.037 AM 05-JUN-07 07.00.42.765 AM
> 2424588842 10-JUN-07 05.00.44.530 PM 11-JUN-07 09.00.44.032 AM
>
> I have 10 different plan here and I know exactly which is in effect at
> datte and time! Amazing, is it not?
>
> Thanks, again.
>
> On 6/14/07, Jeremy Paul Schneider <jeremy.schneider_at_ardentperf.com> wrote:
>
> >
> > You can also query the AWR:
> >
> >
> > SQL> select min(snap_id), max(snap_id) from dba_hist_sqlstat where
> > sql_id='1nh4y7yurm73g';
> > MIN(SNAP_ID) MAX(SNAP_ID)
> > ------------ ------------
> > 8301 8414
> >
> > SQL> col first format a35
> > SQL> col last format a35
> > SQL> select min(begin_interval_time) first, max(end_interval_time) last
> > 2 from dba_hist_sqlstat natural join dba_hist_snapshot
> > 3 where sql_id='1nh4y7yurm73g';
> > FIRST LAST
> > ----------------------------------- -----------------------------------
> > 04-JUN-07 05.00.26.802 PM 09-JUN-07 11.00.08.921 AM
> >
> >
> >
> > On 6/11/07, Hallas, John (EXP N-ARM) <john.hallas_at_lmco.com > wrote:
> > >
> > > Can you not write the dbms_xplan.display to an interim table (create
> > > table xx as select * from ...) and then join that with the
> > > last_load_time from v$sql based on the sql_id in both tables
> > >
> > > John
> > >
> > > ------------------------------
> > > *From:* oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org]
> > > *On Behalf Of *Shivaswamy Raghunath
> > > *Sent:* 11 June 2007 14:05
> > > *To:* Oracle-L
> > > *Subject:* Historical Plan & Time
> > >
> > >
> > > Hello.
> > >
> > > I have found that, the following sql is very helpful in finding out
> > > the historical (What is in AWR) plan of a given SQL_ID.
> > >
> > > select * from table (sys.dbms_xplan.display_awr('&Your_SQL_ID')) ;
> > >
> > > But so far I could not figure out, how I can figure out WHEN this plan
> > > was in effect. Is there a way, I can corelate this plan to Sysdate or in
> > > other words, find out when this plan was in effect?
> > >
> > > Thanks for your insight,
> > > Shiva
> > >
> >
> >
> >
> > --
> > Jeremy Schneider
> > Chicago, IL
> > http://www.ardentperf.com/category/technical
>
>
>

-- 
Niall Litchfield
Oracle DBA
http://www.orawin.info

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