Re: sql with SQL_OPCODE=0

  You might want to look at this post I did a while back. http://kerryosborne.oracle-guy.com/2009/04/hidden-sql-why-cant-i-find-my-sql-text/ Dion and I actually had a bit of discussion on that post. Also 27db bit of the table name may be the hex representation of the object_id being accessed (also discussed in that post). Dion, I'd be interested in any other things you've learned on this subject recently as I haven't really thought about it since that post.

Kerry Osborne
Enkitec
blog: kerryosborne.oracle-guy.com

On Nov 30, 2010, at 7:26 PM, Denis wrote:

> Dion,
>
> Thanks! see following, any more insights on how to interpret it and the x$kglob? That table_e_a is certainly not an application object.
>
> select kglnaobj
> from x$kglob
> where kglobt03 = '6s8fdgnw2u49h'
> ;
> 2 3 4
> KGLNAOBJ
> ------------------------------------------------------------------------------------------------------------------------
> table_e_a_27db_7_0_0
> table_e_a_27db_7_0_0
> table_e_a_27db_7_0_0
> table_e_a_27db_7_0_0
>
>
> From: Dion Cho <ukja.dion_at_gmail.com>
> To: denis.sun_at_yahoo.com
> Cc: oracle-l_at_freelists.org
> Sent: Tue, November 30, 2010 8:11:46 PM
> Subject: Re: sql with SQL_OPCODE=0
>
> Instead of V$SQL, search X$KGLOB, which is the mother of V$SQL.
>
> select kglnaobj
> from x$kglob
> where kglobt03 = '6s8fdgnw2u49h'
> ;
>
> ================================
> Dion Cho - Oracle Performance Storyteller
>
> http://dioncho.wordpress.com (english)
> http://ukja.tistory.com (korean)
> http://sites.google.com/site/otpack (tpack)
> ================================
>
>
> 2010/12/1 Denis <denis.sun_at_yahoo.com>
> Hi,
> Yesterday, after adding a datafile to a busy system, performance degraded. Run the ASH report during problem period, noticed a SQL with sql_id=6s8fdgnw2u49h as the top SQL:
>
> -------------------------------------------------------------
> Top SQL Statements DB/Inst: XXXXXX/XXXXX (Nov 29 16:20 to 16:30)
> SQL ID Planhash % Activity Event % Event
> ------------- ----------- ---------- ------------------------------ ----------
> 6s8fdgnw2u49h N/A 69.67 CPU + Wait for CPU 69.11
> ** SQL Text Not Available **
>
> However, I can not find the sql_text anywhere.
> Today, I noticed that many sessions acutually run this sql as routines. for example:
>
> select sample_time, sql_id, sql_opcode, SESSION_TYPE from v$active_session_history where session_id=882;
>
> SAMPLE_TIME SQL_ID SQL_OPCODE SESSION_TY
> --------------------------------- ------------- ---------- ----------
> 30-NOV-10 06.22.02.843 PM abd2dmdpvjvy5 3 FOREGROUND
> 30-NOV-10 06.21.31.493 PM 1azxzyptvjvvs 3 FOREGROUND
> 30-NOV-10 06.21.30.483 PM 54pdffnh5xgb7 3 FOREGROUND
> ....
> 30-NOV-10 06.17.30.468 PM gkuyk6gjc1tn6 3 FOREGROUND
> 30-NOV-10 06.16.58.038 PM 0 FOREGROUND
> 30-NOV-10 06.16.57.028 PM 6s8fdgnw2u49h 0 FOREGROUND ======> sql_id
> 30-NOV-10 06.16.49.951 PM 3kbr7bthvwqkx 3 FOREGROUND
> 30-NOV-10 06.15.26.961 PM cfm8mwq01sg68 3 FOREGROUND
> 30-NOV-10 06.15.18.861 PM 54pdffnh5xgb7 3 FOREGROUND
> 30-NOV-10 06.13.59.864 PM 0 FOREGROUND
> 30-NOV-10 06.13.42.674 PM 0 FOREGROUND
> 30-NOV-10 06.12.24.736 PM 54pdffnh5xgb7 3 FOREGROUND
> .....
> My question is in which situation we have sql_id but don't have sql_text in v$sql or dba_hist_sqltext? what's the meaning of SQL_OPCODE=0 ? Appreciate anyone can shed some lights on this.
>
> Denis
>
>
>
>
>

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