Re: Blocker did not identified

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>:

> 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>
> 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> 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>
>
>

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