Object Id from address SMON trace file

Hi Friends,
We have a block corruption in undo TBS ( I guess as SMON crashes while dp ) in one of our database ,10.2.0.5.0. In the trace file generated, I saw the following lines
Block header dump: 0x0297ce55
Object id on Block? Y
seg/obj: 0x508f3 csc: 0x0f.a306350 itc: 3 flg: E typ: 1 - DATA
     brn: 0 bdba: 0x297ce0a ver: 0x01 opc: 0
     inc: 0 exflg: 0
Itl           Xid                  Uba         Flag Lck        Scn/Fsc
0x01   0x008b.025.000131c8 0x0f81af61.24c6.40 C---    0 scn 0x000f.0a2cfcfa
0x02   0x003a.000.0003f46d 0x0f8bbddb.dc12.32 --U-    2 fsc 0x0000.0a3063e1
0x03   0x0067.019.00020d74 0x0f817878.5823.08 C---    0 scn 0x000f.0a2a30e2How to identify the object id from seg/obj: 0x508f3 , I cannot recollect it now. Thanks in Advance.
SSN

SSNair wrote:
Hi Friends,
We have a block corruption in undo TBS ( I guess as SMON crashes while dp ) in one of our database ,10.2.0.5.0. In the trace file generated, I saw the following lines
seg/obj: 0x508f3 csc: 0x0f.a306350 itc: 3 flg: E typ: 1 - DATAHow to identify the object id from seg/obj: 0x508f3 , I cannot recollect it now. Thanks in Advance.
Bear in mind that this is the "data_object_id", not the "object_id".
examples:
<ul>
Clustered tables have different object ids but the same data object id.
The data object_id for a given object id will change if you truncate or move a (non-clustered) table, or rebuild an index.
</ul>
Regards
Jonathan Lewis

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Get blocker from the (self) deadlock trace file

Hi,
Recently I had an issue on a 10.2.0.4 single instance database where deadlocks were occurring. The following test case reproduces the problem (I create three parent tables, one child table with indexed foreign keys to all three parent tables and a procedure which performs an insert into the child table in an autonomous transaction):
create table parent_1(id number primary key);
create table parent_2(id number primary key);
create table parent_3(id number primary key);
create table child( id_c number primary key,
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                   id_p2 number,
                   id_p3 number,
                   constraint fk_id_p1 foreign key (id_p1) references parent_1(id),
                   constraint fk_id_p2 foreign key (id_p2) references parent_2(id),
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create index i_id_p1 on child(id_p1);
create index i_id_p2 on child(id_p2);
create index i_id_p3 on child(id_p3);
create or replace procedure insert_into_child as
pragma autonomous_transaction;
begin
insert into child(id_c, id_p1, id_p2, id_p3) values(1,1,1,1);
commit;
end;
insert into parent_1 values(1);
insert into parent_2 values(1);
commit;And now the action that causes the deadlock:
SQL> insert into parent_3 values(1);
1 row created.
SQL> exec insert_into_child;
BEGIN insert_into_child; END;
ERROR at line 1:
ORA-00060: deadlock detected while waiting for resource
ORA-06512: at "SCOTT.INSERT_INTO_CHILD", line 4
ORA-06512: at line 1My question is: how can I determine which table the insert into CHILD was waiting on? It could be waiting on PARENT_1, PARENT_2, PARENT_3, a combination of them or even on CHILD if I tried to insert a duplicate primary key in CHILD. Since we have the full testcase we know that it was waiting on PARENT_3 (or better said, it was waiting for the "parent" transaction to perform a commit/rollback), but is it possible to determine that solely from the deadlock trace file? I'm asking that because to pinpoint the problem I had to perform redo log mining, pl/sql tracing with DBMS_TRACE and manual debugging on a clone of the production database which was restored to a SCN just before the deadlock occurred. So, I had to do quite a lot of work to get to the blocker table and if this information is already in the deadlock trace file, it would have saved me a lot of time.
Below is the deadlock trace file. From the "DML LOCK" part I guess that the child table (tab=227042) holds a mode 3 lock (SX), all the other three parent tables have mode 2 locks (SS), but from this extract I can't see that parent_3 (tab=227040) is blocking the insert into child:
Deadlock graph:
                       ---------Blocker(s)-------- ---------Waiter(s)---------
Resource Name          process session holds waits process session holds waits
TX-00070029-00749150        23     476     X             23     476           S
session 476: DID 0001-0017-00000003     session 476: DID 0001-0017-00000003
Rows waited on:
Session 476: obj - rowid = 000376E2 - AAA3biAAEAAA4BwAAA
(dictionary objn - 227042, file - 4, block - 229488, slot - 0)
Information on the OTHER waiting sessions:
End of information on OTHER waiting sessions.
Current SQL statement for this session:
INSERT INTO CHILD(ID_C, ID_P1, ID_P2, ID_P3) VALUES(1,1,1,1)
----- PL/SQL Call Stack -----
object      line object
handle    number name
3989eef50         4 procedure SCOTT.INSERT_INTO_CHILD
391f3d870         1 anonymous block
        SO: 397691978, type: 36, owner: 39686af98, flag: INIT/-/-/0x00
        DML LOCK: tab=227042 flg=11 chi=0
                  his[0]: mod=3 spn=35288
        (enqueue) TM-000376E2-00000000 DID: 0001-0017-00000003
        lv: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 res_flag: 0x6
        res: 0x398341fe8, mode: SX, lock_flag: 0x0
        own: 0x3980df420, sess: 0x3980df420, proc: 0x39859c660, prv: 0x398341ff8
        SO: 397691878, type: 36, owner: 39686af98, flag: INIT/-/-/0x00
        DML LOCK: tab=227040 flg=11 chi=0
                  his[0]: mod=2 spn=35288
        (enqueue) TM-000376E0-00000000 DID: 0001-0017-00000003
        lv: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 res_flag: 0x6
        res: 0x3983386e8, mode: SS, lock_flag: 0x0
        own: 0x3980df420, sess: 0x3980df420, proc: 0x39859c660, prv: 0x3983386f8
        SO: 397691778, type: 36, owner: 39686af98, flag: INIT/-/-/0x00
        DML LOCK: tab=227038 flg=11 chi=0
                  his[0]: mod=2 spn=35288
        (enqueue) TM-000376DE-00000000 DID: 0001-0017-00000003
        lv: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 res_flag: 0x6
        res: 0x398340f58, mode: SS, lock_flag: 0x0
        own: 0x3980df420, sess: 0x3980df420, proc: 0x39859c660, prv: 0x398340f68
        SO: 397691678, type: 36, owner: 39686af98, flag: INIT/-/-/0x00
        DML LOCK: tab=227036 flg=11 chi=0
                  his[0]: mod=2 spn=35288
        (enqueue) TM-000376DC-00000000 DID: 0001-0017-00000003
        lv: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 res_flag: 0x6
        res: 0x39833f358, mode: SS, lock_flag: 0x0
        own: 0x3980df420, sess: 0x3980df420, proc: 0x39859c660, prv: 0x39833f368
      ----------------------------------------Thank you in advance for any comments,
Jure

Hi Jonathan,
thank you very much for your reply which more than answers my question. I think it actually clears a lot of doubts I had about TX locks, since your mentioning of "undo segment header transaction table" pointed me in the right direction for further research on this topic (honestly, I didn't know what's "behind" TX locks). So if I understood correctly, to determine which table is the blocker (in the testcase presented above), you have to have some kind of history of executed SQL statements (e.g. by mining redo logs)?
The statement you wrote:
At this point, and with your example, the waiting session is waiting on a TX (transaction) lock - this means it has not idea (and no interest) in the actual data involved, it is merely waiting for an undo segment header transaction table slot to clear. and the example with the savepoint you gave, made me think of some of the consequences of that behaviour. That is probably the reason why it is not possible to get the "blocker" table from v$lock (although sometimes it's possible to get it from v$session.row_wait_obj#) when a session tries to change a row another session holds in exclusive mode, e.g.:
create table t1 (id number);
insert into t1 values (1);
commit;
Session 126:
SID = 126> update t1 set id=2 where id=1;
1 row updated.
Session 146:
SID = 146> update t1 set id=2 where id=1;
{session hangs}
In a separate session:
SQL> SELECT   CASE
2                  WHEN TYPE = 'TM'
3                     THEN (SELECT object_name
4                             FROM user_objects
5                            WHERE object_id = l.id1)
6               END object_name,
7                  SID, TYPE, id1, id2, lmode, request, BLOCK
8          FROM v$lock l
9         WHERE SID IN (126, 146)
10     ORDER BY SID, TYPE, 1
11 /
OBJECT_NAME    SID TY        ID1        ID2      LMODE    REQUEST      BLOCK
T1             126 TM      68447          0          3          0          0
               126 TX     262153       4669          6          0          1
T1             146 TM      68447          0          3          0          0
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Since I'd like to get a better understanding on the mechanics behind this (e.g. why the blocked session can't know the segment that is waiting for, since it has to go to the same segment's data block to find the address of the undo segment header transaction table slot? ; can we get the content/structure of the transaction table in the data block - probably by making a block dump?), do you have any source where a more in depth explanation what happens "behind the scenes" is available (perhaps in Oracle Core?)? Some time ago I found a link on your blog http://jonathanlewis.wordpress.com/2010/06/21/locks/ which points to Franck Pachot's article where he nicely explains the various locking modes: http://knol.google.com/k/oracle-table-lock-modes#. There I also found Kyle Hailey's presentation about locks http://www.perfvision.com/papers/09_enqueues.ppt where slide 23 nicely depicts what's going on when acquiring TX locks. Of course I'll try to search on my own, but any other source (especially from an authority like you) is more than welcome.
Thank you again and regards,
Jure

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thanks
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nspsend: 4F 43 4F 4C 3D 74 63 70 |OCOL=tcp|
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Thank you
Message was edited by: tdjohnson7700

SQL Query taking longer time as seen from Trace file

Below Query Execution timings:
Any help will be benefitial as its affecting business needs.
SELECT MATERIAL_DETAIL_ID
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Thanks Buddy.
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Does the use of CONNECT BY Clause degrades performance?
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can u please help me to analyze where i m wrong?
Thanks.

First of all, you should best avoid using the explain= clause on the tkprof command line.
This will run explain plan on the statement in the trace file, and that explain plan can even be wrong, as there is no information on datatypes in the trace file.
The real explain plan data is flushed to the trace file, when the program issues commit or rollback. Oracle always issues an implicit commit when the program disconnects, so when you run the program to completion you should have explain plan output in your trace files.
You won't get explain plan output if you don't have access to the objects in the SQL statement. Also recursive SQL won't produce explain plan result.
One would need to see part of your trace file to verify your assertion the explain clause doesn't always work.
Sybrand Bakker
Senior Oracle DBA

Name of trace file from trace enabled concurrent program

Hi all,
I am looking for a sql script or method to find the name of a trace file in udump for trace enabled concurrent programs. I know the trace files show 11i logon (user_name from fnd_user) in the name of the trace file but I am looking for a sql that would give the exact name of the raw trace file with request id as input.
I have 11.5.10.2.
Any help?
Thanks,

Please see these docs.
11i-How to find the Trace file generated for a concurrent program [ID 270446.1]
How to find the Trace file generated for a concurrent program? [ID 967966.1]
FAQ: Common Tracing Techniques within the Oracle Applications 11i/R12 [ID 296559.1]
Thanks,
Hussein

Any way to generate trace report from the TKPROF formatted trace file?

As titled.
Is there any automatically way to make a report on SQL tuning report from the TKPROF formatted trace file(or from the dynamic performance views)
Paul

Dave,
That's what report queries are for, take a look at shared components. Walk through the create report query wizard, and on the final page, you'll get a URL that you can use to integrate this with your page. You'll find the same URL when editing your report query afterwards.
Alternatively, suppose you already have you report page, but don't want to always go there, you can just copy that report region print link (reference my answer to your previous question), and make that the target of a branch or from another page.
Regards,
Marc

Why doesn't "include/object/text from file" work?

I want to include (link) text from other Word documents to a main Word document and I use "include/object/text from file" (Word function)
It works fine when I do so in "H:", but doing exactly the same in the Sharepoint environement result in "nothing" (nothing happens)
It DOES work if I link from a document saved in Sharepoint to a "H:" - document, but that is of no use since I need all the documents to be stored in Sharepoint.
Guess it has to do with the set up och Sharepoint.
Greatful for any tips!

Hi,
Did you mean insert a object in the documents?
Did you open the file with the local application or office web application?
In the office web application, it doesn’t have the function to insert a object in the browser.
I had tested with some word files in the library, open the word files with the local application, then insert file using the insert object function.
It worked without any issue.
What’s more, I had tested with Office 2010 and Office 2013, they all worked.
Did the issue occur in other libraries? You can create a new library to check whether it works.
You can also download a copy for the issued file, then open it in the local machine to check whether it works in the local machine.
Thanks & Regards,
Jason
Jason Guo
TechNet Community Support

Object Id from address SMON trace file

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