Re: Historical Plan & Time

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

Other related posts: