Re: Blocker did not identified

Part of a possible answer...
https://github.com/dombrooks/Oracle-Monitoring-Scripts/blob/master/transactions.sql

Sent from my iPhone

On 30 Dec 2017, at 22:32, Eriovaldo Andrietta <ecandrietta_at_gmail.com<mailto:ecandrietta_at_gmail.com>> wrote:

Tks Dominic,

This is exactly I am looking for:
What is the way to check lock that is not identified by v$session and v$lock and v$transactions ..

Regards
Eriovaldo

2017-12-30 9:22 GMT-02:00 Dominic Brooks <dombrooks_at_hotmail.com<mailto:dombrooks_at_hotmail.com>>: Also... technically it’s transactions not sessions which hold locks. In some niche circumstances, that can make a difference in how to identify.

Sent from my iPhone

On 30 Dec 2017, at 11:02, Niall Litchfield <niall.litchfield_at_gmail.com<mailto:niall.litchfield_at_gmail.com>> wrote:

Is this a RAC database? You'll need to look also at the instance and blocking_status columns in v$session to rely on the blocking_session column in v$session. https://docs.oracle.com/database/121/REFRN/GUID-28E2DC75-E157-4C0A-94AB-117C205789B9.htm#REFRN30223<https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.oracle.com%2Fdatabase%2F121%2FREFRN%2FGUID-28E2DC75-E157-4C0A-94AB-117C205789B9.htm%23REFRN30223&data=02%7C01%7C%7Ce5abce7a2d1649633ac408d54f74d750%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636502285600939613&sdata=YN6Yr5ej5RLhXTthDuzXIHv%2BTq2KGXX%2FFTJsFT93Rjc%3D&reserved=0> IIRC EM12c also is not RAC aware in its blocking sessions page.

On Sat, Dec 30, 2017 at 3:07 AM, Eriovaldo Andrietta <ecandrietta_at_gmail.com<mailto:ecandrietta_at_gmail.com>> wrote: ​​​Hello,

I got an issue related to lock.
Now the daabase was re-started and the issue is solved. But during investigation I did not get sucess to identify who were locking a table.

A table is used like this:

SELECT ID FROM TABLE_BLA
where id = :1
for upate;

The query did not return the result and looking for lock using this query :

 select s.sid, s.blocking_session, do.object_name,

    row_wait_obj#, row_wait_file#, row_wait_block#, row_wait_row#,     dbms_rowid.rowid_create ( 1, ROW_WAIT_OBJ#, ROW_WAIT_FILE#, ROW_WAIT_BLOCK#, ROW_WAIT_ROW# )     from v$session s, dba_objects do
    where s.ROW_WAIT_OBJ# = do.OBJECT_ID

I saw the row_wait_obj#, ROW_WAIT_FILE#, ROW_WAIT_BLOCK# and ROW_WAIT_ROW# values.

In this situation how can I find the blocker? or
I used a lot of queries that show blocker and locked but without sucess to see the blocker.

Regards
Eriovaldo

--

Niall Litchfield
Oracle DBA
http://www.orawin.info<https://eur02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.orawin.info&data=02%7C01%7C%7Ce5abce7a2d1649633ac408d54f74d750%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636502285600939613&sdata=mftmtNck9%2B16o4DQ2s0i3IDbgJgmSbOyXrzJtazs5B4%3D&reserved=0>

--

http://www.freelists.org/webpage/oracle-l Received on Sat Dec 30 2017 - 23:35:59 CET