Re: Historical Plan & Time
- From: "Shivaswamy Raghunath" <shivaswamykr@xxxxxxxxx>
- To: "Jeremy Paul Schneider" <jeremy.schneider@xxxxxxxxxxxxxx>
- Date: Thu, 14 Jun 2007 16:04:37 -0400
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@xxxxxxxxxxxxxx> 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@xxxxxxxx> 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@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]
> *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
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